WO2024217169A1

WO2024217169A1 - Usb isolation circuit, chip and apparatus, and usb device

Info

Publication number: WO2024217169A1
Application number: PCT/CN2024/080282
Authority: WO
Inventors: 李成; 金文学
Original assignee: 德氪微电子(深圳)有限公司
Priority date: 2023-04-21
Filing date: 2024-03-06
Publication date: 2024-10-24
Also published as: FR3148327A3

Abstract

Disclosed are a USB isolation circuit, chip and apparatus, and a USB device. The USB isolation circuit comprises a first millimeter wave transceiver module, a second millimeter wave transceiver module, an upstream side and a downstream side, wherein the upstream side comprises an upstream side detection and control module and an upstream differential module; the downstream side comprises a downstream side detection and control module and a downstream differential module; the first millimeter wave transceiver module is separately connected to the upstream side detection and control module and the downstream side detection and control module; and the second millimeter wave transceiver module is separately connected to the upstream differential module and the downstream differential module. According to the present invention, millimeter wave isolation technology is introduced to implement an isolation transmission function, and thus key isolation indicators such as withstand voltage, CMTI and bandwidth can be greatly increased.

Description

USB isolation circuit, chip, device and USB equipment

This application claims priority to the Chinese patent applications filed with the China Patent Office on April 21, 2023, with application number 202320975511.X, application name “USB isolation circuit, chip, device and USB device” and application number 202320990406.3, application name “USB isolation circuit, chip, device and USB device”, the entire contents of which are incorporated by reference in this application.

Technical Field

The present disclosure relates to the field of isolation technology, and in particular to a USB isolation circuit, chip, device and USB equipment.

Background Art

Isolation technology is needed in many places in the field of electronic technology, especially in scenarios where high-voltage equipment needs to be connected to low-voltage equipment, such as chargers, power adapters, device debuggers, battery management, etc. By equipping it with a USB isolation chip, it can isolate the high voltage to prevent the high voltage of the device from hitting people or low-voltage equipment, thereby protecting personal safety and protecting the equipment from damage.

The existing isolation technologies are mainly magnetic inductive isolation (magnetic coupling) and capacitive coupling isolation (capacitive coupling). Since both magnetic coupling and capacitive coupling need to be charged and discharged, and charging and discharging require a process, it is difficult to improve the speed; in addition, the larger the volume, the slower the speed. If it is placed in a chip, the volume must be very small, and it is difficult to make the withstand voltage very high; in addition, the CMTI index refers to the degree of influence of the speed of change of the "ground" at both ends of the isolation on the operation of the isolator, and magnetic coupling and capacitive coupling are sensitive to the change of the "ground" at both ends of the isolation, so the CMTI index is also difficult to improve.

Therefore, it is difficult for existing isolation technologies to make significant breakthroughs in key isolation indicators such as withstand voltage, CMTI and bandwidth.

Summary of the invention

The technical problem to be solved by the present disclosure is to provide a USB isolation circuit, a chip, a device and a USB device, which can significantly improve key isolation indicators such as withstand voltage, CMTI and bandwidth.

In order to solve the above technical problems, the first technical solution adopted by the present disclosure is:

The USB isolation circuit includes: a first millimeter wave transceiver module, a second millimeter wave transceiver module, an upstream side and a downstream side;

The uplink side includes an uplink detection and control module and an uplink differential module; the downlink side includes a downlink detection and control module and a downlink differential module;

The first millimeter wave transceiver module is respectively connected to the uplink detection and control module and the downlink detection and control module; the second millimeter wave transceiver module is respectively connected to the uplink differential module and the downlink differential module.

Optionally, the first millimeter wave transceiver module includes a first millimeter wave transceiver module a and a first millimeter wave transceiver module b; the first millimeter wave transceiver module a is arranged in the downlink side, and the first millimeter wave transceiver module b is arranged in the uplink side;

The second millimeter wave transceiver module includes a second millimeter wave transceiver module a and a second millimeter wave transceiver module b; the second millimeter wave transceiver module a is arranged in the downlink side, and the second millimeter wave transceiver module b is arranged in the uplink side.

Optionally, the uplink differential module includes an uplink differential output module and an uplink differential input module; the downlink differential module includes a downlink differential output module and a downlink differential input module;

The uplink differential output module is respectively connected to the second millimeter wave transceiver module b and the uplink side detection and control module;

The uplink differential input module is respectively connected to the second millimeter wave transceiver module b and the uplink side detection and control module;

The downlink differential output module is respectively connected to the second millimeter wave transceiver module a and the downlink side detection and control module;

The downlink differential input module is respectively connected to the second millimeter wave transceiver module a and the downlink side detection and control module.

Optionally, the uplink side further includes an uplink PU/PD module and an uplink interface; the downlink side further includes a downlink PU/PD module and a downlink interface;

The uplink PU/PD module is respectively connected to the uplink detection and control module, the uplink differential input module, the uplink differential output module and the uplink interface; the downlink PU/PD module is respectively connected to the downlink detection and control module, the downlink differential input module, the downlink differential output module and the uplink interface. module and the downstream interface.

Optionally, the uplink interface includes multiple;

The number of the second millimeter wave transceiver module, the uplink differential input module, the uplink differential output module, the downlink differential input module, the downlink differential output module and the downlink interface respectively corresponds to the number of the uplink interface;

The second millimeter wave transceiver module is connected to the corresponding uplink interface through the corresponding uplink differential input module and the uplink differential output module respectively;

The second millimeter wave transceiver module is connected to the corresponding downlink interface through the corresponding downlink differential input module and the downlink differential output module respectively.

Optionally, the second millimeter wave transceiver module is replaced by an uplink differential switch module located on the uplink side and a downlink differential switch module located on the downlink side;

The first millimeter wave transceiver module is respectively connected to the uplink detection and control module and the uplink differential module via the uplink differential switch module, and is respectively connected to the downlink detection and control module and the downlink differential module via the downlink differential switch module.

The first millimeter wave transceiver module a is connected to the downlink differential switch module; the first millimeter wave transceiver module b is connected to the uplink differential switch module.

Optionally, the uplink differential switch module includes an uplink Mux module and an uplink De-Mux module; the downlink differential switch module includes a downlink Mux module and a downlink De-Mux module;

The uplink Mux module and the uplink De-Mux module are respectively connected to the first millimeter wave transceiver module b; the uplink Mux module and the uplink De-Mux module are both connected to the uplink side detection and control module and the uplink differential module;

The downlink Mux module and the downlink De-Mux module are respectively connected to the first millimeter wave transceiver module a; the downlink Mux module and the downlink De-Mux module are both connected to the downlink side detection and control module and the downlink differential module.

Optionally, the uplink differential module includes an uplink differential output module and an uplink differential input module; The downlink differential module includes a downlink differential output module and a downlink differential input module; the uplink side also includes an uplink interface; the downlink side also includes a downlink interface;

The uplink differential input module is respectively connected to the uplink Mux module, the uplink interface and the uplink detection and control module; the uplink differential output module is respectively connected to the uplink De-Mux module, the uplink interface and the uplink detection and control module;

The downstream differential input module is respectively connected to the downstream Mux module, the downstream interface and the downstream side detection and control module; the downstream differential output module is respectively connected to the downstream De-Mux module, the downstream interface and the downstream side detection and control module.

Optionally, the uplink interface includes multiple;

The number of the upstream differential input modules, the upstream differential output modules, the downstream differential input modules, the downstream differential output modules and the downstream interfaces respectively corresponds to the number of the upstream interfaces;

The uplink differential input module and the uplink differential output module are respectively connected to the corresponding uplink interfaces;

The downstream differential input module and the downstream differential output module are respectively connected to corresponding downstream interfaces.

Optionally, the uplink side further includes an uplink PU/PD module; the downlink side further includes a downlink PU/PD module;

The uplink PU/PD module is respectively connected to the uplink detection and control module and the uplink differential module; the downlink PU/PD module is respectively connected to the downlink detection and control module and the downlink differential module.

Optionally, the uplink detection and control module is connected to the uplink differential module; the downlink detection and control module is connected to the downlink differential module.

The second technical solution adopted in this disclosure is:

The USB isolation chip integrates the above-mentioned USB isolation circuit.

The third technical solution adopted in this disclosure is:

A USB isolation device comprises the above-mentioned USB isolation circuit.

The fourth technical solution adopted by the present disclosure is:

A USB device comprises the above-mentioned USB isolation circuit.

Furthermore, when the USB isolation circuit includes only one interface, the interface is a USB2.0 interface or a USB1.x interface; when the USB isolation circuit includes two interfaces, one of the interfaces is a USB2.0 interface or a USB1.x interface, and the other interface is a USB3.0 interface.

The beneficial effects of the present disclosure are: Different from the existing isolation technology using magnetic induction isolation and capacitive coupling isolation, which is difficult to achieve major breakthroughs in key indicators such as withstand voltage, CMTI and bandwidth, the present disclosure introduces millimeter wave isolation technology to achieve isolated transmission function, based on the fact that millimeter waves are insensitive to changes in the "ground" at both ends of the isolation, so the CMTI indicator can be greatly improved; based on the fact that the millimeter wave transceiver module does not require a charging and discharging process and the volume can be very small, it can also be significantly improved in speed, withstand voltage and bandwidth. Therefore, the USB isolation circuit, chip, device and USB device provided by the present disclosure can greatly improve key isolation indicators such as withstand voltage, CMTI and bandwidth.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram 1 of a USB isolation circuit according to an embodiment of the present disclosure;

FIG2 is a second schematic diagram of a USB isolation circuit according to an embodiment of the present disclosure;

FIG3 is a third schematic diagram of a USB isolation circuit according to an embodiment of the present disclosure;

FIG4 is a schematic diagram 1 of a USB isolation circuit according to another embodiment of the present disclosure;

FIG5 is a second schematic diagram of a USB isolation circuit according to another embodiment of the present disclosure;

FIG6 is a third schematic diagram of a USB isolation circuit according to another embodiment of the present disclosure;

FIG7 is a fourth schematic diagram of a USB isolation circuit according to another embodiment of the present disclosure;

FIG8 is a schematic diagram of a USB isolation circuit according to another embodiment of the present disclosure;

FIG. 9 is a schematic diagram of a USB isolation circuit according to another embodiment of the present disclosure.

Description of labels:
1. The first millimeter wave transceiver module; 2. The second millimeter wave transceiver module;
3. Downward side; 4. Upward side;
31. Downstream detection and control module; 32. Downstream differential module;
41. Uplink detection and control module; 42. Uplink differential module;
32-1, downstream differential output module; 32-2, downstream differential input module;
42-1, uplink differential output module; 42-2, uplink differential input module;
43. Uplink PU/PD module;
33. Downlink PU/PD module;
46. Uplink differential switch module;
46-1, uplink Mux module; 46-2, uplink De-Mux module;
36. Downstream differential switch module;
36-1, downstream Mux module; 36-2, downstream De-Mux module;
5. Interface.

DETAILED DESCRIPTION

In order to explain the technical content, achieved objectives and effects of the present disclosure in detail, the following is an explanation in conjunction with the embodiments and the accompanying drawings.

Referring to FIG. 1 , an embodiment of the present disclosure provides a USB isolation circuit, comprising: a first millimeter wave transceiver module 1, a second millimeter wave transceiver module 2, an upstream side 4 and a downstream side 3; the upstream side 4 comprises an upstream side detection and control module 41 and an upstream differential module 42; the downstream side 3 comprises a downstream side detection and control module 31 and a downstream differential module 32;

The first millimeter wave transceiver module 1 is respectively connected to the uplink detection and control module 41 and the downlink detection and control module 31; the second millimeter wave transceiver module 2 is respectively connected to the uplink differential module 42 and the downlink differential module 32.

The working principle of the above embodiment is as follows:

The downstream detection and control module detects the input status of the downstream differential module in real time. If no device is connected, the system is in an unconnected state.

When a device is connected, the downlink detection and control module transmits the status to the uplink detection and control module through the first millimeter-wave transceiver module. The uplink detection and control module then feeds back the connection status to the host through the uplink differential module and waits for the reset signal from the host. The host's reset signal is then transmitted to the downlink detection and control module through the first millimeter-wave transceiver module. The downlink detection and control module sends the reset signal to the connected device through the downlink differential module, thereby completing the device connection process.

After the connection state is established, the downlink detection and control module and the uplink detection and control module continue to implement The interface signals of the differential modules connected to each other are detected at the same time, and the transmission direction of the communication data is determined by which side leaves the IDLE state first.

Assuming that the downlink detection and control module first detects that the interface of the differential module has left the IDLE state, it will first transmit this status information to the uplink detection and control module through the first millimeter-wave transceiver module, and enable the data transmission function of the downlink differential module input to the second millimeter-wave transceiver module. After receiving the status information, the uplink detection and control module enables the data transmission function from the second millimeter-wave transceiver module to the output of the uplink differential module, thereby establishing a data transmission path from the downlink side to the uplink side; when the downlink detection and control module detects that the data transmission is completed, it transmits this status information to the uplink detection and control module, the uplink detection and control module turns off the output of the uplink differential module, and sets the interface of the uplink differential module to the IDLE state, and both sides begin to prepare for the next transmission.

If the downlink detection and control module detects that the downlink differential module input is in an unconnected state, this state will be transmitted to the uplink detection and control module through the first millimeter wave transceiver module. The uplink detection and control module will set the uplink differential module to an unconnected state, and the system will return to the device unconnected state.

It can be understood that this embodiment is based on the existing USB isolation circuit, and the magnetic inductive isolator or capacitive isolator therein is replaced by two millimeter wave transceiver modules, namely the first millimeter wave transceiver module 1 and the second millimeter wave transceiver module 2, and the isolation transmission function of the high and low voltage ends is realized based on the millimeter wave wireless communication technology. The specific communication control and transmission methods do not need to be changed, and can be directly based on the existing USB communication protocol.

Different from the existing transmission isolation achieved by magnetic inductive isolators or capacitive isolators, millimeter waves are insensitive to changes in the "ground" at both ends of the isolation, so the CMTI index can be greatly improved; the millimeter wave transceiver module does not require charging and discharging and the volume can be very small, so the speed, voltage resistance and bandwidth can also be significantly improved.

In this embodiment, two millimeter wave transceiver modules are provided to be responsible for the transmission of detection/control signals and the transmission of communication data, respectively, so as to ensure the normal use of the USB transmission function. Specifically, the detection and control modules on the upstream side and the downstream side are used to detect the plugging and unplugging and transmission direction and control the opening of the corresponding channel (the communication transmission channel from the upstream side to the downstream side or the communication transmission channel from the downstream side to the upstream side); and the first millimeter wave transceiver module 1 is provided to connect the detection and control modules on the upstream side and the downstream side respectively to realize the transmission of detection/control signals; and the second millimeter wave transceiver module 2 is provided to connect the differential modules on the upstream side and the downstream side respectively to realize the transmission of communication data.

As shown in FIG. 1 , the upstream detection and control module 41 will be connected to the upstream differential module 42 ; the downstream detection and control module 31 will be connected to the downstream differential module 32 , so as to realize the control of the differential module by the detection and control module.

Please refer to Figure 2. In some specific embodiments, each millimeter wave transceiver module includes a millimeter wave receiving module and a millimeter wave transmitting module. Accordingly, the first millimeter wave transceiver module 1 is specifically composed of a first millimeter wave transceiver module a (corresponding to the first millimeter wave transceiver module 1a shown in Figure 2) and a first millimeter wave transceiver module b (corresponding to the first millimeter wave transceiver module 1b shown in Figure 2), and are respectively arranged in the downlink side and the uplink side, and the first millimeter wave transceiver module a and the first millimeter wave transceiver module b are based on millimeter wave wireless communication; the second millimeter wave transceiver module b is composed of a second millimeter wave transceiver module a (corresponding to the second millimeter wave transceiver module 2a shown in Figure 2) and a second millimeter wave transceiver module b (corresponding to the second millimeter wave transceiver module 2b shown in Figure 2), and are respectively arranged in the downlink side and the uplink side, and the second millimeter wave transceiver module a and the second millimeter wave transceiver module b are based on millimeter wave wireless communication. It can be understood that the above-mentioned first millimeter wave transceiver module a and the second millimeter wave transceiver module a can be millimeter wave receiving modules or millimeter wave sending modules; accordingly, the first millimeter wave transceiver module b and the second millimeter wave transceiver module b are millimeter wave sending modules/millimeter wave receiving modules.

Please refer to FIG. 3. In some other specific implementations based on the above specific implementations, the uplink differential module 42 specifically includes an uplink differential output module 42-1 and an uplink differential input module 42-2; the downlink differential module 32 specifically includes a downlink differential output module 32-1 and a downlink differential input module 32-2; the uplink differential output module 42-1 is respectively connected to the second millimeter wave transceiver module b (corresponding to the second millimeter wave transceiver module 2b shown in FIG. 3) and the uplink side detection and control module 41; the uplink differential input module 42 -2 are respectively connected to the second millimeter wave transceiver module b (corresponding to the second millimeter wave transceiver module 2b shown in Figure 3) and the uplink side detection and control module 41; the downlink differential output module 32-1 is respectively connected to the second millimeter wave transceiver module a (corresponding to the second millimeter wave transceiver module 2a shown in Figure 3) and the downlink side detection and control module 31; the downlink differential input module 32-2 is respectively connected to the second millimeter wave transceiver module a (corresponding to the second millimeter wave transceiver module 2a shown in Figure 3) and the downlink side detection and control module 31.

Furthermore, the upstream side 4 further includes an upstream PU/PD module 43 and an upstream interface (corresponding to UD+/UD- in FIG. 3 ); the downstream side 3 further includes a downstream PU/PD module 33 and a downstream interface (corresponding to FIG. 3 The upstream interface UD+/UD- is connected to the USB2.0/1.xHost; the downstream interface DD+/DD- is connected to the USB2.0/1.xDevice.

The uplink PU/PD module 43 is respectively connected to the uplink side detection and control module 41, the uplink differential input module 42-2, the uplink differential output module 42-1 and the uplink interface UD+/UD-; the downlink PU/PD module 33 is respectively connected to the downlink side detection and control module 31, the downlink differential input module 32-2, the downlink differential output module 32-1 and the downlink interface DD+/DD-.

The following is a functional description of the modules involved in the embodiments of the present invention.

The uplink PU/PD module/the downlink PU/PD module is used to control the pull-up or pull-down of the differential interface according to the received control signal (from the uplink detection and control module/the downlink detection and control module);

The uplink differential input module/downlink differential input module is used to convert the interface differential signal into a single-ended signal;

The uplink differential output module/downlink differential output module is used to convert the single-ended signal into a differential signal or output a high-impedance state according to the received signal;

The downstream detection and control module is used to detect the plugging and unplugging and transmission direction according to the status of the downstream interface DD+/DD- and the status information of the upstream side, and generate corresponding control signals to control the plugging and unplugging and transmission direction, and transmit the generated status signal to the upstream side through the first millimeter wave transceiver module;

The uplink detection and control module is used to detect the plugging and unplugging and transmission direction according to the status of the uplink interface UD+/UD- and the status information of the downlink side, and generate corresponding control signals to control the plugging and unplugging and transmission direction, and transmit the generated status signal to the downlink side through the first millimeter wave transceiver module;

The first millimeter wave transceiver module is used for transmitting control signals and status information through a wireless isolation channel;

The second millimeter wave transceiver module is used for transmitting the wireless isolation channel of communication data.

Accordingly, the working principle of the embodiment of the present invention is as follows:

When no device is connected, the DD+ and DD- in the downstream interface are pulled down to 0 by the PU/PD module using a 15kΩ resistor;

When a device is connected, the downstream interface DD+ or DD- will be pulled up to 1 by the 1.5kΩ resistor of the connected device. (DD- is pulled up to 1 to indicate that the connected device is a low-speed device, and DD+ is pulled up to 1 to indicate that the connected device is a full-speed or high-speed device);

The downlink detection and control module transmits the status information of DD+ and DD- to the uplink detection and control module through the first millimeter wave transceiver module; the uplink detection and control module pulls up the corresponding UD+ or UD- in the uplink interface to 1 using a 1.5kΩ resistor through the uplink PU/PD module based on the received status information;

The upstream detection and control module waits for the reset signal from the host (UD+ and UD- are both pulled down to 0), and then transmits the reset signal to the downstream detection and control module through the first millimeter wave transceiver module. The downstream detection and control module pulls down the DD+ and DD- of the downstream interface to 0 through the downstream PU/PD module, thereby generating a reset signal for the connected device, thereby completing the identification handshake process.

If the connected device is a high-speed device, similar to the above steps, according to the high-speed handshake process specified in the USB2.0 protocol, the status information of DD+ and DD- of the downstream interface is passed to UD+ and UD- of the upstream interface, or the status information of UD+ and UD- of the upstream interface is passed to DD+ and DD- of the downstream interface, thereby completing the high-speed identification handshake process.

After the above steps, the connection status and speed mode have been determined and remain unchanged. Next, the downlink detection and control module and the uplink detection and control module detect the status of their respective interfaces D+/D- in real time, and the transmission direction of the communication data is determined by which side first detects that D+/D- has left the IDLE state.

Assuming that the downstream detection and control module first detects that D+/D- has left the IDLE state, it will first transmit this state information to the upstream detection and control module. After receiving the state information, the upstream detection and control module enables the upstream differential output module, thereby establishing data transmission in the direction of DD+/DD- to UD+/UD-, that is, the data transmission path from the downstream interface to the upstream interface; when the downstream detection and control module detects that the data transmission is completed, it transmits this state information to the upstream detection and control module. The upstream detection and control module turns off the upstream differential output module and sets the upstream interface UD+/UD- to the IDLE state, and both sides begin to prepare for the next transmission.

In low-speed or full-speed mode, if the downstream interface DD+ and DD- are detected to be 0 and exceed 2us, the device is considered to be disconnected; in high-speed mode, if the differential voltage of the downstream interface DD+/DD- is greater than 625mV, the device is considered to be disconnected; after detecting that the device is disconnected, the downstream interface DD+/DD- is pulled down to 0 through 15kΩ, and the pull-up resistor on the upstream interface UD+/UD- is removed, returning to the device unconnected state.

In another optional embodiment, as shown in FIG8 , the uplink interface includes a plurality of;

The second millimeter wave transceiver module is connected to the corresponding downlink interface through the corresponding downlink differential input module and the downlink differential output module respectively;

In this embodiment, the upstream interface includes two, and the upstream interface and its corresponding downstream interface constitute an interface 5; one of the interfaces 5 is a USB2.0 interface or a USB1.x interface, and the other interface 5 is a USB3.0 interface;

In the downstream side, as shown in FIG8 , the interfaces 5 from top to bottom can be represented as DD+/DD- and DSSTX+/DSSTX-/DSSRX+/DSSRX- respectively;

In the upstream side, as shown in FIG8 , the interfaces 5 from top to bottom can be represented as UD+/UD- and USSTX+/USSTX-/USSRX+/USSRX- respectively;

Then DD+/DD- and DSSTX+/DSSTX-/DSSRX+/DSSRX- (downstream ports) are connected to USB3.0/2.0/1.xDevice, and UD+/UD- and USSTX+/USSTX-/USSRX+/USSRX- (upstream ports) are connected to USB3.0/2.0/1.xHost;

The attack capabilities of each module in Figure 8 are described as follows:

1. 33-downlink PU/PD module, 43-uplink PU/PD module:

According to the input control signal, the differential interface DD+/DD- or UD+/UD- is pulled up or down;

2. 32-2-downstream differential input module, 42-2-upstream differential input module (the first one from top to bottom in Figure 8):

Receive USB2.0/1.x signals on the D+/D- interface and convert them into internal signals;

3. 32-1- Downstream differential output module, 42-1- Upstream differential input module (the first one from top to bottom in Figure 8):

Convert internal signals into USB2.0/1.x signals and output them to the D+/D- interface;

4. 32-2-downward differential input module, 42-2-upward differential input module (the second one from top to bottom in Figure 8):

Receive USB3.0 signals on the SSRX+/SSRX- interface and convert them into internal signals;

5. 32-1- Downstream differential output module, 42-1- Upstream differential input module (the second one from top to bottom in Figure 8):

Convert the internal signal into USB3.0 signal and output it to SSTX+/SSTX- interface;

6. 31- Downstream detection and control module:

According to the status of the downstream ports DD+/DD- and DSSTX+/DSSTX-/DSSRX+/DSSRX- and the status information of the upstream side, the plug-in and unplugging and transmission direction detection are performed, and corresponding control signals are generated to perform plug-in control. At the same time, the generated status signals are transmitted to the upstream side via millimeter waves;

7. 41- Uplink detection and control module:

According to the status of the upstream ports UD+/UD- and USSTX+/USSTX-/USSRX+/USSRX- and the status information of the upstream side, the plugging and unplugging and transmission direction detection are performed, and corresponding control signals are generated to perform plugging and unplugging control. At the same time, the generated status signals are transmitted to the downstream side via millimeter waves;

8. 1-The first millimeter wave transceiver module:

Used for transmission control and status wireless isolation channel;

9. 2- The second millimeter wave transceiver module (the first one from top to bottom in Figure 8):

Wireless isolation channel for transmitting USB2.0/1.x data;

10. 2- The second millimeter wave transceiver module (the second one from top to bottom in Figure 8):

Wireless isolation channel for transmitting USB3.0 data;

The working process of this embodiment is as follows:

1. When no device is connected, DD+ and DD- are pulled down to 0 by the PU/PD module using a 15kΩ resistor; no termination resistor is detected on DSSTX+/DSSTX-;

2. When a USB3.0 device is connected, the termination resistor will be detected on DSSTX+/DSSTX-; when a USB2.0/1.x device is connected, DD+ or DD- will be pulled up to 1 by the device's 1.5kΩ resistor (DD- is pulled up to 1 to indicate that the connected device is a low-speed device, and DD+ is pulled up to 1 to indicate that the connected device is a full-speed or high-speed device);

3. The downlink detection and control module will transmit the status information of DD+/DD- and DSSTX+/DSSTX- to the uplink detection and control module through the first millimeter wave transceiver module 1a on the downlink side and the first millimeter wave transceiver module 1b on the uplink side. The uplink detection and control module will connect a terminal on USSRX+/USSRX- Resistor, or pull the corresponding UD+ or UD- up to 1 using a 1.5kΩ resistor through the PU/PD module;

4. If the connected device is a USB3.0 device, the upstream side and the downstream side respectively enable the second second millimeter wave transceiver module from top to bottom in Figure 8, that is, the DSSRX+/DSSRX- on the downstream side is directly connected to the USSTX+/USSTX- on the upstream side through the above second millimeter wave transceiver module, and the USSRX+/USSRX- on the upstream side is directly connected to the DSSTX+/DSSTX- on the downstream side through the above second millimeter wave transceiver module. At this time, USB3.0 overspeed mode communication can be performed until the termination resistor is not detected on the DSSTX+/DSSTX- on the downstream side, and the upstream side and the downstream side return to the state where the device is not connected;

5. If the connected device is a USB2.0/1.x device, the upstream detection and control module waits for the reset signal from the host (UD+ and UD- are both pulled down to 0), and then transmits the reset signal to the downstream detection and control module through the first millimeter wave transceiver module 1a on the upstream side and the first millimeter wave transceiver module 1b on the downstream side. The downstream detection and control module pulls DD+ and DD- down to 0 through the PU/PD module, thereby generating a reset signal for the connected device;

6. If the connected device is a high-speed device, similar to steps 3 and 4, according to the high-speed handshake process specified in the USB2.0 protocol, the status of DD+ and DD- is transferred to UD+ and UD-, or the status of UD+ and UD- is transferred to DD+ and DD-, thereby completing the high-speed identification handshake process;

After the above steps, the connection status and speed mode have been determined and remain unchanged;

Next, the downlink detection and control module and the uplink detection and control module detect the states of their respective D+/D- in real time. The data transmission direction is determined by which side first detects that D+/D- changes from the IDLE state to the data transmission state. If the downlink detection and control module first detects that D+/D- leaves the IDLE state, it first transmits this information to the uplink detection and control module. After receiving the information, the uplink detection and control module enables the differential output module, thereby establishing data transmission in the direction of DD+/DD- to UD+/UD-. When the downlink detection and control module detects that the data transmission is completed, it transmits this information to the uplink detection and control module. The uplink detection and control module turns off the differential output and sets UD+/UD- to the IDLE state. Both sides begin to prepare for the next transmission.

In low-speed or full-speed mode, if DD+ and DD- are detected to be 0 and exceed 2us, the device is considered disconnected. In high-speed mode, if the differential voltage of DD+/DD- is greater than 625mV, the device is considered disconnected. After detecting that the device is disconnected, DD+/DD- is pulled down to 0 through 15kΩ, and the pull-up resistor on UD+/UD- is removed, returning to the state where the device is not connected.

This implementation can achieve isolated transmission of USB3.0/2.0/1.x via millimeter waves.

In another optional implementation, the second millimeter wave transceiver module is replaced by an uplink differential switch module located on the uplink side and a downlink differential switch module located on the downlink side;

The first millimeter wave transceiver module is respectively connected to the uplink detection and control module and the uplink differential module via the uplink differential switch module, and is respectively connected to the downlink detection and control module and the downlink differential module via the downlink differential switch module;

Specifically, referring to FIG. 4 , an embodiment of the present disclosure provides a USB isolation circuit, comprising: a first millimeter wave transceiver module 1, an upstream side 4 and a downstream side 3; the upstream side 4 comprises an upstream differential switch module 46, an upstream side detection and control module 41 and an upstream differential module 42; the downstream side 3 comprises a downstream differential switch module 36, a downstream side detection and control module 31 and a downstream differential module 32;

The first millimeter wave transceiver module 1 is respectively connected to the uplink detection and control module 41 and the uplink differential module 42 via the uplink differential switch module 46 , and is respectively connected to the downlink detection and control module 31 and the downlink differential module 32 via the downlink differential switch module 36 .

It can be understood that the uplink detection and control module 41 will be connected to the uplink differential module 42; the downlink detection and control module 31 will be connected to the downlink differential module 32, so as to realize the detection and control module to detect and control the differential module.

In this embodiment, the detection and control modules on the uplink side and the downlink side are used to generate corresponding control information to the differential switch module based on the received status information, so as to control the plug-in and transmission direction, and at the same time transmit the generated status information to the opposite side through millimeter waves; and by setting the first millimeter wave transceiver module 1 to be respectively connected to the detection and control modules on the uplink side and the downlink side, the transmission of detection/control signals is realized; the differential switch modules on the uplink side and the downlink side are used to select the signal from the differential module or from the detection and control module to transmit to the first millimeter wave transceiver module to the opposite side according to the signal input by the detection and control module, and output the signal from the first millimeter wave transceiver module to the differential module or the detection and control module.

The working principle of the above embodiment is as follows:

When a device is connected, the downlink detection and control module transmits the status to the uplink detection and control module through the downlink differential switch module, the first millimeter wave transceiver module and the uplink differential switch module. The side detection and control module then feeds back the connection status to the host through the uplink differential module and waits for the reset signal from the host; then the reset signal of the host is transmitted to the downlink side detection and control module through the uplink differential switch module, the first millimeter-wave transceiver module and the downlink differential switch module. The downlink side detection and control module sends the reset signal to the connected device through the downlink differential module, thereby completing the device connection process.

After the connection state is established, the downstream detection and control module and the upstream detection and control module continue to detect the interface signals of the differential modules connected to them in real time, and the transmission direction of the communication data is determined by which side leaves the IDLE state first.

Assuming that the downlink detection and control module first detects that the interface of the differential module has left the IDLE state, the status information is first transmitted to the uplink detection and control module through the downlink differential switch module, the first millimeter wave transceiver module and the uplink differential switch module, and the downlink differential switch module is selected to the downlink differential module. After receiving the status information, the uplink detection and control module enables the output function of the uplink differential module, thereby establishing a data transmission path from the downlink side to the uplink side; when the downlink detection and control module detects that the data transmission is completed, the downlink differential switch module is selected to the downlink detection and control module, and the status information is transmitted to the uplink detection and control module. The uplink detection and control module turns off the output of the uplink differential module, and sets the interface of the uplink differential module to the IDLE state, and both sides begin to prepare for the next transmission.

If the downlink detection and control module detects that the downlink differential module input is in an unconnected state, this state is transmitted to the uplink detection and control module through the downlink differential switch module, the first millimeter-wave transceiver module and the uplink differential switch module. The uplink detection and control module sets the uplink differential module to an unconnected state, and the system returns to the device unconnected state.

It can be understood that this embodiment is based on the existing USB isolation circuit, and the magnetic inductive isolator or capacitive isolator therein is replaced by a group of millimeter wave transceiver modules, namely, the first millimeter wave transceiver module; at the same time, differential switch modules are respectively arranged on the upstream side and the downstream side to play a role in selecting channel conduction, thereby realizing the isolation transmission function of the high and low voltage ends based on the millimeter wave wireless communication technology, and the specific communication control and transmission mode do not need to be changed, and can be directly based on the existing USB communication protocol.

Different from the existing transmission isolation realized by magnetic inductive isolators or capacitive isolators, millimeter waves are insensitive to the changes of the "ground" at both ends of the isolation, so the CMTI index can be greatly improved; The millimeter wave transceiver module does not require a charging and discharging process and can be made very small, so it can also be significantly improved in speed, voltage resistance and bandwidth. In particular, this embodiment is provided with an uplink differential switch module and a downlink differential switch module on the uplink side and the downlink side respectively to play a role in selecting channel conduction, thereby realizing the millimeter wave isolation transmission function that can only be achieved by multiple groups of millimeter wave transceiver modules by only one group of millimeter wave transceiver modules, thereby effectively solving the crosstalk problem that may be caused by multiple groups of millimeter wave transceiver modules.

In this embodiment, a group of millimeter-wave transceiver modules are provided to be responsible for the transmission of detection/control signals and communication data, thereby ensuring the normal use of the USB transmission function; and an upstream differential switch module and a downstream differential switch module are provided to play the role of selecting channel conduction, thereby achieving the millimeter-wave isolation transmission function that could only be achieved by multiple groups of millimeter-wave transceiver modules. Only one group of millimeter-wave transceiver modules can be used to achieve the function, thereby effectively solving the crosstalk problem that may be caused by multiple groups of millimeter-wave transceiver modules.

Please refer to Figure 5. In some specific embodiments, the first millimeter wave transceiver module 1 includes a millimeter wave receiving module and a millimeter wave sending module. Accordingly, the first millimeter wave transceiver module 1 is specifically composed of a millimeter wave transceiver module a (corresponding to the millimeter wave transceiver module 1a shown in Figure 5) and a millimeter wave transceiver module b (corresponding to the millimeter wave transceiver module 1b shown in Figure 5), and is respectively arranged in the downlink side and the uplink side. The millimeter wave transceiver module a is connected to the downlink differential switch module 36; the millimeter wave transceiver module b is connected to the uplink differential switch module 46. The millimeter wave transceiver module a and the millimeter wave transceiver module b communicate wirelessly based on millimeter waves. It can be understood that the above-mentioned millimeter wave transceiver module a can be a millimeter wave receiving module or a millimeter wave sending module; accordingly, the millimeter wave transceiver module b is a millimeter wave sending module/millimeter wave receiving module.

Please refer to Figure 6. In some specific embodiments, the uplink differential switch module 46 includes an uplink Mux module 46-1 and an uplink De-Mux module 46-2; the downlink differential switch module 36 includes a downlink Mux module 36-1 and a downlink De-Mux module 36-2; the uplink Mux module 46-1 and the uplink De-Mux module 46-2 are respectively connected to the millimeter wave transceiver module b (corresponding to the millimeter wave transceiver module 1b shown in Figure 6); the uplink Mux module 46-1 and the uplink De-Mux module 46-2 are both connected to the uplink side detection and control module 41 and the uplink differential module 42; the downlink Mux module 36-1 and the downlink De-Mux module 36-2 are respectively connected to the millimeter wave transceiver module a (corresponding to the millimeter wave transceiver module 1a shown in Figure 6); the downlink Mux module 36-1 and the downlink De-Mux module 36-2 are both connected To the downstream detection and control module 31 and the downstream differential module 32.

The working principle of the above specific implementation is as follows:

When a device is connected, the downstream detection and control module transmits the status to the upstream detection and control module through the downstream Mux module, the first millimeter-wave transceiver module and the upstream De-Mux module. The upstream detection and control module then feeds back the connection status to the host through the upstream differential module and waits for the reset signal from the host; then the reset signal of the host is transmitted to the downstream detection and control module through the upstream Mux module, the first millimeter-wave transceiver module and the downstream De-Mux module. The downstream detection and control module sends the reset signal to the connected device through the downstream differential module, thereby completing the device connection process.

Assuming that the downlink detection and control module first detects that the interface of the differential module has left the IDLE state, the status information is first transmitted to the uplink detection and control module through the downlink Mux module, the first millimeter wave transceiver module and the uplink De-Mux module, and the downlink Mux module is selected to the downlink differential module. After receiving the status information, the uplink detection and control module enables the output function of the uplink differential module, thereby establishing a data transmission path from the downlink side to the uplink side; when the downlink detection and control module detects that the data transmission is completed, the downlink Mux module is selected to the downlink detection and control module, and the status information is transmitted to the uplink detection and control module. The uplink detection and control module turns off the output of the uplink differential module, and sets the interface of the uplink differential module to the IDLE state, and both sides begin to prepare for the next transmission.

If the downlink side detection and control module detects that the downlink differential module input is in an unconnected state, this state is transmitted to the uplink side detection and control module through the downlink Mux module, the first millimeter wave transceiver module and the uplink De-Mux module. The uplink side detection and control module sets the uplink differential module to an unconnected state, and the system returns to the device unconnected state.

Further, referring to FIG. 7 , in some other specific implementations based on the above specific implementations, the uplink differential module 42 specifically includes an uplink differential output module 42-1 and an uplink differential input module 42-2; the downlink differential module 32 specifically includes a downlink differential output module 32-1 and a downlink differential input module 42-2. Module 32-2; the uplink differential output module 42-1 is respectively connected to the uplink De-Mux module 46-2, the uplink interface and the uplink side detection and control module 41; the uplink differential input module 42-2 is respectively connected to the uplink Mux module 46-1, the uplink interface and the uplink side detection and control module 41; the downlink differential input module 32-2 is respectively connected to the downlink Mux module 36-1, the downlink interface and the downlink side detection and control module 31; the downlink differential output module 32-1 is respectively connected to the downlink De-Mux module 36-2, the downlink interface and the downlink side detection and control module 31.

Furthermore, the upstream side 4 further includes an upstream PU/PD module 43 and an upstream interface (corresponding to UD+/UD- in FIG. 7 ); the downstream side 3 further includes a downstream PU/PD module 33 and a downstream interface (corresponding to DD+/DD- in FIG. 7 ). The upstream interface UD+/UD- is connected to the USB2.0/1.xHost; the downstream interface DD+/DD- is connected to the USB2.0/1.xDevice.

The uplink Mux module/downlink Mux module is used to select a signal from the corresponding differential input or detection and control module to the first millimeter wave transceiver module according to the selection signal output by the corresponding detection and control module;

The uplink De-Mux module/downlink De-Mux module is used to output the signal of the first millimeter wave transceiver module to the corresponding detection and control module or differential output module according to the special identifier in the output signal of the first millimeter wave transceiver module, wherein the special identifier can be a special waveform that does not appear in normal data, For example, narrow pulses, etc.

The first millimeter wave transceiver module is used for transmitting control signals, status information and a wireless isolation channel for communication data.

When a device is connected, the downstream interface DD+ or DD- will be pulled up to 1 by the 1.5kΩ resistor of the connected device (DD- is pulled up to 1 to indicate that the connected device is a low-speed device, and DD+ is pulled up to 1 to indicate that the connected device is a full-speed or high-speed device);

The downlink detection and control module transmits the status information of DD+ and DD- to the uplink De-Mux module through the downlink Mux module and the first millimeter wave transceiver module in sequence, and then outputs the received status signal to the uplink detection and control module; the uplink detection and control module pulls up the corresponding UD+ or UD- in the uplink interface to 1 using a 1.5kΩ resistor through the uplink PU/PD module based on the received status information;

The upstream detection and control module waits for the reset signal from the host (UD+ and UD- are both pulled down to 0), and then transmits the reset signal to the downstream De-Mux module through the upstream Mux module and the first millimeter-wave transceiver module in sequence, which then transmits the reset signal to the downstream detection and control module. The downstream detection and control module pulls down the DD+ and DD- of the downstream interface to 0 through the downstream PU/PD module, thereby generating a reset signal for the connected device, thereby completing the identification handshake process.

If the connected device is a high-speed device, similar to the above steps, according to the high-speed handshake process specified in the USB2.0 protocol, the status information of DD+ and DD- of the downstream interface is passed to UD+ and UD- of the upstream interface. Or the status information of UD+ and UD- of the upstream interface is transmitted to DD+ and DD- of the downstream interface, thereby completing the high-speed identification handshake process.

After the above steps, the connection status and speed mode have been determined and remain unchanged. Next, the downlink detection and control module and the uplink detection and control module will detect the status of their respective interfaces D+/D- in real time, and the transmission direction of the communication data is determined by which side first detects that D+/D- has left the IDLE state.

Assuming that the downstream detection and control module first detects that D+/D- has left the IDLE state, it first transmits this state information to the upstream detection and control module, and then selects the downstream Mux module to the downstream differential input module. The upstream detection and control module enables the upstream differential output module based on the state information received from the upstream detection and control module, thereby establishing data transmission in the direction of DD+/DD- to UD+/UD-, that is, the data transmission path from the downstream interface to the upstream interface; when the downstream detection and control module detects that the data transmission is completed, it transmits this state information to the upstream detection and control module, and the upstream detection and control module turns off the upstream differential output module and sets the upstream interface UD+/UD- to the IDLE state, and both sides begin to prepare for the next transmission.

In another optional embodiment, as shown in FIG9 , the uplink interface includes a plurality of;

In the downstream side, as shown in FIG9 , the interfaces 5 from top to bottom can be represented as DD+/DD- and DSSTX+/DSSTX-/DSSRX+/DSSRX- respectively;

In the upstream side, as shown in FIG9 , the interfaces 5 from top to bottom can be represented as UD+/UD- and USSTX+/USSTX-/USSRX+/USSRX- respectively;

The attack capabilities of each module in Figure 9 are described as follows:

1. 33-downlink PU/PD module, 43-uplink PU/PD module:

2. 32-2-downward differential input module, 42-2-upward differential input module (the first one from top to bottom in Figure 9):

3. 32-1- Downstream differential output module, 42-1- Upstream differential input module (the first one from top to bottom in Figure 9):

4. 32-2-downward differential input module, 42-2-upward differential input module (the second one from top to bottom in Figure 9):

Receive USB3.0 signals on SSRX+/SSRX- interface and convert them into internal signals

5. 32-1- Downstream differential output module, 42-1- Upstream differential input module (the second one from top to bottom in Figure 9):

Convert the internal signal into USB3.0 signal and output it to SSTX+/SSTX- interface

6. Mux module:

According to the selection signal, a signal from a differential input or control module is selected to the millimeter wave transceiver module;

7. De-Mux module:

Output the signal of the millimeter wave transceiver module to the detection and control module or the differential output module;

8. Downstream detection and control module:

According to the status of the downstream ports DD+/DD- and DSSTX+/DSSTX-/DSSRX+/DSSRX- and the status of the upstream side Status information, detect plug-in and unplug and transmission direction, and generate corresponding control signals to control plug-in and unplug. At the same time, the generated status signal is transmitted to the uplink side via millimeter wave;

9. Uplink detection and control module:

According to the status of the upstream ports UD+/UD- and USSTX+/USSTX-/USSRX+/USSRX- and the status information of the upstream side, the plugging and unplugging and transmission direction are detected, and the corresponding control signals are generated to control the plugging and unplugging. At the same time, the generated status signals are transmitted to the downstream side via millimeter waves.

The working process of this embodiment is as follows:

1. When no device is connected, DD+ and DD- are pulled down to 0 by the PU/PD module using a 15kΩ resistor, and no termination resistor is detected on DSSTX+/DSSTX-;

3. The downlink detection and control module transmits the status information of DD+/DD- and DSSTX+/DSSTX- to the uplink detection and control module through the Mux and the first millimeter-wave transceiver module 1a on the downlink side and the first millimeter-wave transceiver module 1b and De-Mux on the uplink side. The uplink detection and control module connects a termination resistor to USSRX+/USSRX-, or pulls the corresponding UD+ or UD- up to 1 using a 1.5kΩ resistor through the PU/PD module;

4. If the connected device is a USB3.0 device, the Mux and De-Mux modules on the upstream and downstream sides both select the second differential input and the second differential output from top to bottom in Figure 9, that is, the DSSRX+/DSSRX- on the downstream side is directly connected to the USSTX+/USSTX- on the upstream side through the first millimeter-wave transceiver module, and the USSRX+/USSRX- on the upstream side is directly connected to the DSSTX+/DSSTX- on the downstream side through the first millimeter-wave transceiver module. At this time, USB3.0 overspeed mode communication can be performed until the termination resistor is no longer detected on the DSSTX+/DSSTX- on the downstream side, and the upstream and downstream sides return to the state where the device is not connected;

5. If the connected device is a USB2.0/1.x device, the upstream detection and control module waits for the reset signal from the host (UD+ and UD- are both pulled down to 0), and then transmits the reset signal to the downstream detection and control module through the upstream Mux and the first millimeter wave transceiver module 1b and the downstream first millimeter wave transceiver module 1a and De-Mux. The downstream detection and control module pulls DD+ and DD- down to 0 through the PU/PD module. That is, a reset signal is generated for the connected device;

After the above steps, the connection status and speed mode have been determined and remain unchanged; next, the downstream detection and control module and the upstream detection and control module detect the status of their respective D+/D- in real time, and the data transmission direction is determined by which side first detects that D+/D- changes from the IDLE state to the data transmission state. If the downstream detection and control module first detects that D+/D- leaves the IDLE state, it first transmits this information to the upstream detection and control module, and then selects the Mux to the differential input module. After receiving the information, the upstream detection and control module enables the differential output module, thereby establishing data transmission in the direction of DD+/DD- to UD+/UD-. When the downstream detection and control module detects that the data transmission is completed, it transmits this information to the upstream detection and control module, and the upstream detection and control module turns off the differential output and sets UD+/UD- to the IDLE state, and both sides begin to prepare for the next transmission;

The embodiment of the present disclosure also provides a USB isolation chip, on which the USB isolation circuit described in the above embodiment is integrated. The specific structure and composition of the USB isolation circuit will not be repeated here, and please refer to the description of the above embodiment for details.

The embodiments of the present disclosure also provide a USB isolation device, which includes the USB isolation circuit described in the above embodiments or the USB isolation chip described in the above embodiments. The specific structure of the USB isolation circuit is not repeated here, please refer to the description of the above embodiments for details.

The embodiments of the present disclosure also provide a USB device, which includes the USB isolation circuit or the USB isolation chip described in the above embodiments. The specific structure of the USB isolation circuit is not repeated here, please refer to the description of the above embodiments for details.

In some specific implementations, when the number of interfaces of a USB device is 1, the USB device The interface is a USB2.0 interface to achieve isolated transmission of USB2.0 (compatible with USB1.X) through millimeter wave technology;

When the USB device has two interfaces, one of the interfaces is a USB 2.0 interface or a USB 1.x interface, and the other interface is a USB 3.0 interface.

In summary, the USB isolation circuit, chip, device and USB equipment provided by the present disclosure can significantly improve key isolation indicators such as withstand voltage, CMTI and bandwidth.

The above descriptions are merely embodiments of the present disclosure and are not intended to limit the patent scope of the present disclosure. Any equivalent transformations made using the contents of the present disclosure and the drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present disclosure.

Claims

The USB isolation circuit is characterized by comprising: a first millimeter wave transceiver module, a second millimeter wave transceiver module, an upstream side and a downstream side;

The uplink side includes an uplink detection and control module and an uplink differential module; the downlink side includes a downlink detection and control module and a downlink differential module;

The first millimeter wave transceiver module is respectively connected to the uplink detection and control module and the downlink detection and control module; the second millimeter wave transceiver module is respectively connected to the uplink differential module and the downlink differential module.
The USB isolation circuit according to claim 1, characterized in that the first millimeter wave transceiver module includes a first millimeter wave transceiver module a and a first millimeter wave transceiver module b; the first millimeter wave transceiver module a is arranged in the downstream side, and the first millimeter wave transceiver module b is arranged in the upstream side;

The second millimeter wave transceiver module includes a second millimeter wave transceiver module a and a second millimeter wave transceiver module b; the second millimeter wave transceiver module a is arranged in the downlink side, and the second millimeter wave transceiver module b is arranged in the uplink side.
The USB isolation circuit according to claim 2, characterized in that the upstream differential module includes an upstream differential output module and an upstream differential input module; the downstream differential module includes a downstream differential output module and a downstream differential input module;

The uplink differential output module is respectively connected to the second millimeter wave transceiver module b and the uplink side detection and control module;

The uplink differential input module is respectively connected to the second millimeter wave transceiver module b and the uplink side detection and control module;

The downlink differential output module is respectively connected to the second millimeter wave transceiver module a and the downlink side detection and control module;

The downlink differential input module is respectively connected to the second millimeter wave transceiver module a and the downlink side detection and control module.
The USB isolation circuit according to claim 3, characterized in that the upstream side further includes an upstream PU/PD module and an upstream interface; the downstream side further includes a downstream PU/PD module and a downstream interface;

The uplink PU/PD module is respectively connected to the uplink detection and control module, the uplink differential input module, the uplink differential output module and the uplink interface; the downlink PU/PD module is respectively The downstream detection and control module, the downstream differential input module, the downstream differential output module and the downstream interface are connected.
The USB isolation circuit according to claim 4, wherein the upstream interface comprises a plurality of;

The number of the second millimeter wave transceiver module, the uplink differential input module, the uplink differential output module, the downlink differential input module, the downlink differential output module and the downlink interface respectively corresponds to the number of the uplink interface;

The second millimeter wave transceiver module is connected to the corresponding uplink interface through the corresponding uplink differential input module and the uplink differential output module respectively;

The second millimeter wave transceiver module is connected to the corresponding downlink interface through the corresponding downlink differential input module and the downlink differential output module respectively.
The USB isolation circuit according to claim 1, characterized in that the second millimeter wave transceiver module is replaced by an upstream differential switch module located on the upstream side and a downstream differential switch module located on the downstream side;

The first millimeter wave transceiver module is respectively connected to the uplink detection and control module and the uplink differential module via the uplink differential switch module, and is respectively connected to the downlink detection and control module and the downlink differential module via the downlink differential switch module.
The USB isolation circuit according to claim 6, characterized in that the first millimeter wave transceiver module includes a first millimeter wave transceiver module a and a first millimeter wave transceiver module b; the first millimeter wave transceiver module a is arranged in the downstream side, and the first millimeter wave transceiver module b is arranged in the upstream side;

The first millimeter wave transceiver module a is connected to the downlink differential switch module; the first millimeter wave transceiver module b is connected to the uplink differential switch module.
The USB isolation circuit according to claim 7, characterized in that the upstream differential switch module includes an upstream Mux module and an upstream De-Mux module; the downstream differential switch module includes a downstream Mux module and a downstream De-Mux module;

The uplink Mux module and the uplink De-Mux module are respectively connected to the first millimeter wave transceiver module b; the uplink Mux module and the uplink De-Mux module are both connected to the uplink side detection and control module and the uplink differential module;

The downlink Mux module and the downlink De-Mux module are respectively connected to the first millimeter wave transceiver Module a; the downlink Mux module and the downlink De-Mux module are both connected to the downlink side detection and control module and the downlink differential module.
The USB isolation circuit according to claim 8, characterized in that the upstream differential module includes an upstream differential output module and an upstream differential input module; the downstream differential module includes a downstream differential output module and a downstream differential input module; the upstream side also includes an upstream interface; the downstream side also includes a downstream interface;

The uplink differential input module is respectively connected to the uplink Mux module, the uplink interface and the uplink detection and control module; the uplink differential output module is respectively connected to the uplink De-Mux module, the uplink interface and the uplink detection and control module;

The downstream differential input module is respectively connected to the downstream Mux module, the downstream interface and the downstream side detection and control module; the downstream differential output module is respectively connected to the downstream De-Mux module, the downstream interface and the downstream side detection and control module.
The USB isolation circuit according to claim 9, wherein the upstream interface comprises a plurality of;

The number of the upstream differential input modules, the upstream differential output modules, the downstream differential input modules, the downstream differential output modules and the downstream interfaces respectively corresponds to the number of the upstream interfaces;

The uplink differential input module and the uplink differential output module are respectively connected to the corresponding uplink interfaces;

The downstream differential input module and the downstream differential output module are respectively connected to corresponding downstream interfaces.
The USB isolation circuit according to claim 6, characterized in that the upstream side further includes an upstream PU/PD module; the downstream side further includes a downstream PU/PD module;

The uplink PU/PD module is respectively connected to the uplink detection and control module and the uplink differential module; the downlink PU/PD module is respectively connected to the downlink detection and control module and the downlink differential module.
The USB isolation circuit according to claim 1 or 6, characterized in that the upstream detection and control module is connected to the upstream differential module; the downstream detection and control module is connected to the downstream differential module Differential module.
A USB isolation chip, characterized in that the USB isolation circuit according to any one of claims 1 to 12 is integrated thereon.
A USB isolation device, characterized in that it comprises the USB isolation circuit described in any one of claims 1 to 12 above.
A USB device, characterized in that it comprises the USB isolation circuit described in any one of claims 1 to 12 above.
The USB device according to claim 14, characterized in that when it includes the USB isolation circuit according to any one of claims 1 to 4, 6 to 9 and 11 to 12, its interface is a USB 2.0 interface or a USB 1.x interface;

When it includes the USB isolation circuit described in claim 5 or 10, the upstream interface includes two, one of which and its corresponding downstream interface are USB2.0 interfaces or USB1.x interfaces, and the other upstream interface and its corresponding downstream interface are USB3.0 interfaces.