CN220985668U - Broadband frequency modulation communication system - Google Patents
Broadband frequency modulation communication system Download PDFInfo
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- CN220985668U CN220985668U CN202322706150.1U CN202322706150U CN220985668U CN 220985668 U CN220985668 U CN 220985668U CN 202322706150 U CN202322706150 U CN 202322706150U CN 220985668 U CN220985668 U CN 220985668U
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- 230000005236 sound signal Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
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- 238000005192 partition Methods 0.000 description 1
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Abstract
The utility model relates to a broadband frequency modulation communication system, comprising: the explanation module and receiving module, the explanation module includes: the wireless communication device comprises a microphone, a first Bluetooth chip, a first VCO circuit, a power amplifier, a first filter and a first antenna, wherein an interphone chip is arranged in the first VCO circuit; the receiving module comprises: the wireless communication device comprises a loudspeaker, a second Bluetooth chip, an FM modulation circuit, a second VCO circuit, a low-noise amplifier, a second filter and a second antenna, wherein an interphone chip is arranged in the second VCO circuit. The integrated interphone baseband IC BK4802 is adopted as the VCO local oscillator to replace the VCO circuit of the traditional discrete component, so that the utility model has few peripheral elements, simple and stable debugging and reduced production cost; FM radio IC is used for receiving, the modulation scheme of NFM civil interphone is replaced, and WFM modulation tone quality is good; and the Bluetooth IC BK3288BLE is used for connecting the mobile phone with the broadband frequency modulation communication module to obtain the geographic position, so that the position sharing and the fixed-point playing of SD card contents are realized.
Description
Technical Field
The utility model relates to the technical field of long-distance wireless explanation communication, in particular to a broadband frequency modulation communication system.
Background
The explanation ware scheme that prior art provided is to tone quality requirement better be adopting schemes such as bluetooth, WIFI, wireless miaow microphone, but this kind of communication mode effective distance is short, turns round or the partition wall just can not effective communication. The other type uses civil interphone open frequency and digital modulation mode, but the type is NFM modulation mode, and the tone quality is poor, the cost is high, and the function is single.
Disclosure of utility model
The present utility model provides a method for producing a semiconductor device,
In order to achieve the above object, the present utility model provides the following technical solutions:
A wideband frequency modulated communication system comprising: the explanation module and receiving module, the explanation module includes: the wireless communication device comprises a microphone, a first Bluetooth chip, a first VCO circuit, a power amplifier, a first filter and a first antenna, wherein an interphone chip is arranged in the first VCO circuit;
The microphone, the first Bluetooth chip, the first VCO circuit, the power amplifier, the first filter and the first antenna are sequentially connected;
The receiving module comprises: the wireless communication device comprises a loudspeaker, a second Bluetooth chip, an FM modulation circuit, a second VCO circuit, a low-noise amplifier, a second filter and a second antenna, wherein an interphone chip is arranged in the second VCO circuit;
The loudspeaker, the second Bluetooth chip, the FM modulation circuit, the second VCO circuit, the low-noise amplifier, the second filter and the second antenna are sequentially connected.
Preferably, the interphone chip is an integrated interphone baseband BK4802 chip.
Preferably, the first bluetooth chip and the second bluetooth chip are both BK3288 BLE.
Preferably, the explanation module further comprises a first main control chip, a first key switch and a first display screen, wherein the first main control chip is connected with the first Bluetooth chip, and the first key switch and the first display screen are connected with the first main control chip.
Preferably, the first bluetooth chip is used for being connected with a mobile phone or/and an SD card.
Preferably, the receiving module further comprises a second main control chip, a second key switch and a second display screen, wherein the second main control chip is connected with the second Bluetooth chip, and the second key switch and the second display screen are both connected with the second main control chip.
Preferably, the second bluetooth chip is used for being connected with a mobile phone or/and an SD card.
Through implementing above technical scheme, have following technical effect: the utility model provides a broadband frequency modulation communication system: 1. the integrated interphone baseband IC BK4802 is adopted as the VCO local oscillator to replace the traditional VCO circuit of discrete components, so that the number of peripheral elements is small, the debugging is simple and stable, and the production cost is reduced; 2. FM radio IC is used for receiving, the modulation scheme of NFM civil interphone is replaced, and WFM modulation tone quality is good; 3. the Bluetooth IC BK3288 BLE is used for connecting the mobile phone with the broadband frequency modulation communication module to obtain the geographic position, so that position sharing and fixed-point playing of SD card contents are realized; 4. the broadband frequency modulation communication module outputs power with additional PA, and the power is adjustable, so that different user groups can be practically used.
Drawings
Fig. 1 is a schematic diagram of a wideband fm communication system according to the present utility model.
Detailed Description
For a better understanding of the technical solution of the present utility model, the embodiments provided by the present utility model are described in detail below with reference to the accompanying drawings.
As shown in fig. 1, it can be understood that the wideband fm communication system provided in this embodiment includes: the explanation module and receiving module, the explanation module includes: the wireless communication device comprises a microphone, a first Bluetooth chip, a first VCO circuit, a power amplifier, a first filter and a first antenna, wherein an interphone chip is arranged in the first VCO circuit; the microphone, the first Bluetooth chip, the first VCO circuit, the power amplifier, the first filter and the first antenna are sequentially connected; the receiving module comprises: the wireless communication device comprises a loudspeaker, a second Bluetooth chip, an FM modulation circuit, a second VCO circuit, a low-noise amplifier, a second filter and a second antenna, wherein an interphone chip is arranged in the second VCO circuit; the loudspeaker, the second Bluetooth chip, the FM modulation circuit, the second VCO circuit, the low-noise amplifier, the second filter and the second antenna are sequentially connected.
In this embodiment, the explanation module is used with the receiving module pair, and the explanation module is used for gathering and transmitting information such as voice call, information identification, position sharing, and the receiving module is used for receiving the above information, achieves the purpose of information receiving and transmitting, and is applied to long-distance high-quality-guaranteeing low-cost receiving and transmitting equipment such as tour guide, teaching, fixed-point broadcasting, and the like. Specifically, when a voice call information control mode is selected, voice information is input to a first Bluetooth chip through a microphone, and is subjected to voice noise reduction treatment (surrounding noise is filtered, human voice is reserved) and then mixed and remodulated through a first VCO (voltage controlled oscillator) circuit; the power amplifier performs power amplification and the first filter performs filtering, so that a useful signal is generated and transmitted to the receiving module through the first antenna.
The receiving module receives an external wireless signal from the second antenna, extracts a useful signal through frequency selection of the second filter, amplifies the signal of the low-noise amplifier, enters the second VCO circuit to carry out local oscillation signal mixing, and the obtained signal enters the FM modulating circuit to be demodulated, and the demodulated audio signal enters the second Bluetooth chip to be processed and then outputs audio through the loudspeaker.
In this embodiment, the interphone chip is an integrated interphone baseband BK4802 chip. In the first VCO circuit and the second VCO circuit, signals are mixed with BK4802 local oscillation signals to replace the traditional VCO circuit with discrete components, so that the number of peripheral elements is small, the debugging is simple and stable, and the production cost is reduced.
And the first Bluetooth chip and the second Bluetooth chip are BK3288 BLE. The Bluetooth IC BK3288 BLE is used for connecting the mobile phone with the broadband frequency modulation communication module to obtain the geographic position, so that ultra-low power consumption performance, excellent Bluetooth connection and advanced audio processing capability can be provided.
Further, the explanation module further comprises a first main control chip, a first key switch and a first display screen, wherein the first main control chip is connected with the first Bluetooth chip, and the first key switch and the first display screen are connected with the first main control chip. The first Bluetooth chip is used for being connected with a mobile phone or/and an SD card.
In the explanation module, when a key control mode is selected, the mobile phone is connected with Bluetooth through BLE to obtain a geographic position, positioning information or fixed-point playing SD card information is encoded and processed by a first main control chip through first key switch operation, ASK (inquiry) information is modulated, power amplified and filtered after being mixed and processed by an integrated interphone baseband BK4802 chip, and useful signals are transmitted to the receiving module through a first antenna.
Correspondingly, the receiving module further comprises a second main control chip, a second key switch and a second display screen, wherein the second main control chip is connected with the second Bluetooth chip, and the second key switch and the second display screen are both connected with the second main control chip. The second Bluetooth chip is used for being connected with the mobile phone or/and the SD card.
When the receiving module is operated by keys, an external wireless signal is received from a second antenna, a useful signal is extracted through frequency selection of a second filter, signal amplification is carried out on a low-noise amplifier, the signal enters a second VCO circuit to be mixed with BK4802 local oscillation signals, the obtained signal enters an FM modulating circuit to be demodulated, the demodulated audio signal enters a second Bluetooth chip to extract ASK information, positioning information is analyzed or SD card information is played at fixed points, and the second main control chip is notified through serial port communication to display the positioning information or the SD card information is played at fixed points.
While the wideband fm communication system provided by the embodiments of the present utility model has been described in detail, those skilled in the art should not understand the present utility model as being limited to the specific embodiments and application ranges according to the concepts of the embodiments of the present utility model.
Claims (7)
1. A wideband frequency modulated communication system comprising: explanation module and receiving module, its characterized in that, the explanation module includes: the wireless communication device comprises a microphone, a first Bluetooth chip, a first VCO circuit, a power amplifier, a first filter and a first antenna, wherein an interphone chip is arranged in the first VCO circuit;
The microphone, the first Bluetooth chip, the first VCO circuit, the power amplifier, the first filter and the first antenna are sequentially connected;
The receiving module comprises: the wireless communication device comprises a loudspeaker, a second Bluetooth chip, an FM modulation circuit, a second VCO circuit, a low-noise amplifier, a second filter and a second antenna, wherein an interphone chip is arranged in the second VCO circuit;
The loudspeaker, the second Bluetooth chip, the FM modulation circuit, the second VCO circuit, the low-noise amplifier, the second filter and the second antenna are sequentially connected.
2. The wideband fm communication system of claim 1, wherein the intercom chip is an integrated intercom baseband BK4802 chip.
3. The wideband fm communication system of claim 1, wherein the first bluetooth chip and the second bluetooth chip are each BK3288 BLE.
4. The broadband fm communication system according to claim 1, wherein the explanation module further comprises a first main control chip, a first keyswitch and a first display screen, wherein the first main control chip is connected with the first bluetooth chip, and the first keyswitch and the first display screen are both connected with the first main control chip.
5. The broadband fm communication system according to claim 4, wherein said first bluetooth chip is configured to connect to a cell phone or/and an SD card.
6. The broadband fm communication system according to claim 1, wherein the receiving module further comprises a second main control chip, a second keyswitch and a second display screen, wherein the second main control chip is connected with the second bluetooth chip, and the second keyswitch and the second display screen are both connected with the second main control chip.
7. The broadband fm communication system according to claim 1, wherein the second bluetooth chip is configured to connect to a cell phone or/and an SD card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322706150.1U CN220985668U (en) | 2023-10-10 | 2023-10-10 | Broadband frequency modulation communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322706150.1U CN220985668U (en) | 2023-10-10 | 2023-10-10 | Broadband frequency modulation communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220985668U true CN220985668U (en) | 2024-05-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322706150.1U Active CN220985668U (en) | 2023-10-10 | 2023-10-10 | Broadband frequency modulation communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220985668U (en) |
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2023
- 2023-10-10 CN CN202322706150.1U patent/CN220985668U/en active Active
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