CN210155570U - Automatic amplitude stabilizing circuit with temperature compensation - Google Patents
Automatic amplitude stabilizing circuit with temperature compensation Download PDFInfo
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- CN210155570U CN210155570U CN201921127928.0U CN201921127928U CN210155570U CN 210155570 U CN210155570 U CN 210155570U CN 201921127928 U CN201921127928 U CN 201921127928U CN 210155570 U CN210155570 U CN 210155570U
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Abstract
The utility model discloses an automatic amplitude stabilizing circuit with temperature compensation, which comprises a signal link module, a temperature compensation module, a control signal link module and a control signal output module, wherein the signal link module is used for receiving an input signal, attenuating the input signal according to the control signal to adjust the signal amplitude, amplifying the adjusted input signal to be used as a link output signal, coupling partial output signal, outputting a coupled radio frequency power signal, compensating a preset voltage reference value according to the detected temperature, outputting a voltage signal after compensation, converting the coupled radio frequency power signal into a direct current detection voltage signal, outputting the control signal according to the difference between the direct current detection voltage signal and the compensated voltage signal, controlling the gain of the signal link module according to the control signal, preventing the signal link module from changing due to the temperature change, and the gain of the signal link module is constant, the output power is unchanged, and the amplitude of the direct current detection voltage signal is consistent with that of the compensated voltage signal.
Description
Technical Field
The utility model relates to a steady width of cloth circuit technical field especially relates to a take temperature compensation's automatic steady width of cloth circuit.
Background
The transmitting equipment in communication system converts the non-electric original information (information source) sent by information sender, such as speech, text and image, etc. into electric signal, then the signal is processed into signal form suitable for channel transmission, and sent to channel. Generally, as the temperature of the communication transmitting circuit changes, the total link gain changes, and finally, the power value of the output signal transmitted through the link changes. In some high-demand occasions, the output power of the circuit is required to be kept stable and does not change along with the temperature. Therefore, an auto-amplitude stabilization circuit is needed to keep the link output power stable.
The existing circuit considers the use of temperature compensation steadily, and referring to fig. 1, fig. 1 is a general circuit of the existing temperature compensation, and a main chain is composed of a digital attenuator and an amplifier. Before temperature compensation is carried out, the difference value between the set power and the actual output power is measured in all temperature ranges in advance, namely the difference value between the set power and the actual output power corresponding to the temperature value is measured at a certain temperature value, the difference value and the temperature value output by the corresponding temperature sensor are stored in a microcontroller, an algorithm in the microcontroller analyzes the difference value and the temperature value, and the attenuation quantity which needs to be compensated at the temperature is determined. The temperature sensor is used for monitoring the temperature of the amplifier, the ADC (analog-to-digital converter) converts analog voltage signals output by the temperature sensor into digital signals, the microcontroller receives the digital signals and analyzes the digital signals to obtain a current temperature value, and then a pre-prepared compensation value is used for controlling the digital attenuator to attenuate through a data line, so that the output amplitude of the main link at different temperatures is kept unchanged.
When the inventor implements the automatic amplitude stabilizing circuit with the temperature compensation, the inventor finds that the technical scheme needs to spend huge workload in advance to perform a large amount of data tests, record output power corresponding to all temperature points, need a software algorithm and hardware to cooperate with each other to realize the amplitude stabilizing characteristic, acquire the output power by an analog-to-digital converter (ADC), and need to spend long time when a microcontroller performs operation and controls digital attenuation through data lines, so that the algorithm is complex and the real-time controllability is poor.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a take temperature compensation's automatic steady width of cloth circuit can mend the compensation in real time, and circuit structure is simple, need not complicated algorithm, reduces the operation.
In order to achieve the above object, an embodiment of the present invention provides an automatic amplitude stabilizing circuit with temperature compensation, including a signal link module, configured to receive an input signal, attenuate the input signal according to a control signal to adjust the amplitude of the input signal, amplify the adjusted input signal, output the amplified input signal as a link output signal, couple a part of the output signal, and output a coupled radio frequency power signal;
the temperature compensation module is used for compensating a preset voltage reference value according to the detected temperature and outputting a compensated voltage signal;
and the error control module is used for converting the coupled radio-frequency power signal into a direct-current detection voltage signal and outputting the control signal according to the difference value between the direct-current detection voltage signal and the compensated voltage signal so as to enable the amplitude of the direct-current detection voltage signal to be consistent with that of the compensated voltage signal.
In one embodiment, the temperature compensation module comprises:
the temperature sensing circuit is used for outputting a corresponding voltage value according to the ambient temperature;
the adjusting circuit is used for adjusting the voltage value output by the temperature sensing circuit according to the slope value of the voltage value output by the temperature sensing circuit along with the temperature change speed and the intercept value output by the temperature sensing circuit when the voltage value is at zero centigrade to output the adjusted voltage value;
the voltage reference circuit is used for outputting a preset voltage reference value;
and the first adder is used for adding the adjusted voltage value and a preset voltage reference value and outputting the compensated voltage signal.
In one embodiment, the error control module comprises:
the detector is used for receiving the coupled radio frequency power signal and converting the coupled radio frequency power signal into a direct current detection voltage signal;
the differential amplifier is used for carrying out differential amplification on the direct current detection voltage signal and the compensated voltage signal and outputting a differential amplification signal;
and the integrator is used for performing integration operation on the differential amplification signal and outputting a control signal.
In one embodiment, the detectors are disposed at the periphery of the temperature sensing circuit for thermal coupling.
In one embodiment, the adjusting circuit includes:
the first amplifying circuit is used for multiplying the slope value by the voltage value output by the temperature sensing circuit to obtain a slope voltage adjusting value;
the reference voltage division circuit is used for outputting the intercept value;
and the second adder is used for adding the slope voltage adjustment value and the intercept value and outputting the adjusted voltage value.
In one embodiment, the signal link module includes:
the voltage-controlled attenuator is used for receiving an input signal and attenuating the input signal according to the control signal so as to adjust the amplitude of the input signal;
a first amplifier for amplifying the attenuated signal;
and the directional coupler is used for receiving the amplified signals, coupling part of the amplified signals to output coupled radio frequency power signals, and outputting the other part of the amplified signals as link output signals.
In one embodiment, the voltage reference circuit includes:
the chip is used for outputting a preset voltage reference value, wherein the preset voltage reference value does not change along with the temperature.
In one embodiment, the reference voltage divider circuit includes:
the fixed voltage circuit is used for providing a preset fixed voltage signal;
and the resistance voltage division circuit is used for dividing the preset fixed voltage signal and outputting the intercept value.
The implementation of the embodiment has the following outstanding characteristics:
an automatic amplitude stabilizing circuit with temperature compensation comprises a signal link module, a temperature compensation module, an error control module and a control signal, wherein the signal link module is used for receiving an input signal, attenuating the input signal according to a control signal to adjust the amplitude of the input signal, amplifying the adjusted input signal to be output as a link output signal, coupling part of output signals to output a coupled radio frequency power signal, compensating a preset voltage reference value according to the detected temperature to output a compensated voltage signal, converting the coupled radio frequency power signal into a direct current detection voltage signal, outputting the control signal according to the difference between the direct current detection voltage signal and the compensated voltage signal, controlling the gain of a signal link according to the control signal and preventing the signal link gain change caused by the temperature change, and the signal link gain is constant, the output power is unchanged, and the loop enters a stable state, so that the amplitude of the direct current detection voltage signal is consistent with that of the compensated voltage signal. The circuit is in a closed-loop negative feedback state by adopting a pure hardware control mode, can compensate in real time, and has a simple circuit structure without a complex compensation algorithm.
Drawings
Fig. 1 is a schematic structural diagram of an automatic amplitude stabilizing circuit with temperature compensation in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an adjusting circuit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, the embodiment of the utility model provides a take temperature compensation's automatic steady amplitude circuit, including signal link module 01, temperature compensation module 02 and error control module 03, take temperature compensation's automatic steady amplitude circuit can use among all signal amplification circuit, like television signal amplification circuit, wifi amplified signal circuit, cell-phone signal amplification circuit etc.. Any place where signal amplification is performed while the output of the amplification chain is sensitive to temperature may be used. This will be explained in detail below.
The signal link module 01 is configured to receive an input signal, attenuate the input signal according to a control signal to adjust an amplitude of the input signal, amplify the adjusted input signal to output the amplified input signal as a link output signal, couple a part of the output signal, and output a coupled radio frequency power signal.
In one embodiment, the signal link module 01 includes a voltage-controlled attenuator 11, a first amplifier 12, and a directional coupler 13, which will be described in detail below.
The voltage-controlled attenuator 11 is configured to receive an input signal, and attenuate the input signal according to the control signal to adjust the amplitude of the input signal.
In this embodiment, the voltage-controlled attenuator 11 receives an input signal, which may be an analog signal, and the voltage-controlled attenuator 11 is used to attenuate the signal amplitude.
The first amplifier 12 is used for amplifying the attenuated signal.
In this embodiment, the first amplifier 12 may be used to amplify a radio frequency signal.
The directional coupler 13 is configured to receive the amplified signal, couple a part of the amplified signal out to couple a radio frequency power signal, and output another part of the amplified signal as a link output signal.
In this embodiment, the directional coupler 13 has two channels, one channel is used to transmit most, for example, 95%, of the output signal power of the first amplifier 12 and is used as the output of the main link, and the other channel is used to couple a small part, for example, 5%, of the output signal of the first amplifier 12. The coupling amount is determined according to the characteristics of the directional coupler 13 itself, and can be selected according to actual requirements. By measuring the power of the coupled-out signal, the output power can be deduced in a reverse manner, which enables the power measurement to be carried out without disturbing the output.
In this embodiment, the signal link module 01 controls the signal link gain to amplify the input analog signal, the gain of the first amplifier 12 is generally fixed, the attenuation of the voltage-controlled attenuator 11 is controllable, and the voltage-controlled attenuator 11 is placed before the first amplifier 12 to achieve the total gain equal to the absolute attenuation of the first amplifier 12 gain-voltage-controlled attenuator 11, so that the signal link can output the maximum power of the amplifier while the signal link gain is controlled.
The temperature compensation module 02 is configured to compensate a preset voltage reference value according to the detected temperature, and output a compensated voltage signal.
In one embodiment, the temperature compensation module 02 includes a temperature sensing circuit 21, an adjusting circuit 22, a voltage reference circuit 23, and a first adder 24, which will be described in detail below.
The temperature sensing circuit 21 is used for outputting a corresponding voltage value according to the ambient temperature.
In the present embodiment, the temperature sensing circuit 21 refers to a circuit having a function of a temperature sensor, or a circuit with a temperature sensor, and the temperature sensor refers to a sensor that can sense temperature and convert into a usable output signal, such as a semiconductor temperature sensor.
The adjusting circuit 22 is configured to adjust the voltage value output by the temperature sensing circuit 21 according to a slope value of a voltage value output by the temperature sensing circuit 21 along with a degree of temperature change and an intercept value output by the temperature sensing circuit 21 when the voltage value is at zero degrees centigrade, so as to output the adjusted voltage value.
In the present embodiment, the adjusting circuit 22, i.e. the slope and intercept adjuster circuit, is used to adjust the speed of the output value of the temperature sensing circuit 21 changing with the temperature and the initial value of the output voltage at 0 ℃.
In the present embodiment, the output of the temperature sensing circuit 21 is adjusted by the adjusting circuit 22 and enters the first adder 24 together with the voltage reference signal output by the voltage reference circuit 23 for addition operation, and the output of the first adder 24 is connected to the other input terminal of the differential amplifier 32. The output of the temperature sensing circuit 21 has a substantially linear relationship with the temperature, assuming that the output of the temperature sensing circuit 21 is Y and the temperature is X. Then Y ═ a × X + B. A and B are constants. A is the slope and B is the intercept. However, a and B are not always required values and need to be changed to C and D, i.e. Y ═ C × X + D. The function of the adjustment circuit 22 is to convert A, B to C, D. C and D are constants when determined. Assuming that the voltage reference signal output is E, it is also a constant. The final output of the temperature compensation module 02 is Y ═ C × X + D + E. C. D, E is constant, X is temperature, and Y is fixed at constant temperature. D and E can be mathematically combined, but are separated because the voltage reference is typically a relatively large and fixed value, allowing fine tuning of D, and more flexible operation.
In one embodiment, referring to fig. 2, the adjusting circuit 22 includes a first amplifying circuit 221, a reference voltage dividing circuit 222, a fixed voltage circuit 223, a resistance voltage dividing circuit 224, and a second adder 225, which will be described in detail below.
The first amplifying circuit 221 is configured to multiply the slope value by the voltage value output by the temperature sensing circuit 21 to obtain a slope voltage adjustment value.
The reference voltage divider circuit 222 is used to output the intercept value.
In one embodiment, the reference voltage divider circuit 222 includes a fixed voltage circuit 223 and a resistance voltage divider circuit 224, which will be described in detail below.
The fixed voltage circuit 223 is used to provide a predetermined fixed voltage signal.
The resistance voltage divider 224 is configured to divide the preset fixed voltage signal and output the intercept value.
The error control module 03 is configured to convert the coupled rf power signal into a dc detection voltage signal, and output the control signal according to a difference between the dc detection voltage signal and the compensated voltage signal, so that the coupled rf power signal output by the signal link module 01 and the compensated voltage signal have the same amplitude. The control signal controls the gain of the signal link and prevents the signal link from changing due to temperature change, so that the gain of the signal link is constant, the output power is unchanged, and the loop enters a stable state. At this time, the amplitude of the dc detection voltage signal is consistent with that of the compensated voltage signal.
The second adder 225 is configured to add the slope voltage adjustment value and the intercept value, and output the adjusted voltage value.
In fig. 2, the first amplifying circuit 221 may be an amplifier, the amplification factor of the amplifier is slope a, the voltage X output by the temperature sensing circuit 21 is adjusted by the first amplifying circuit 221 to be Y ' ═ a × X, the reference voltage dividing circuit 222 is a resistor voltage divider, a fixed voltage signal B ' can be obtained by the voltage reference circuit 23 or the power supply, the intercept B can be output by adjusting the resistor voltage divider by the reference voltage dividing circuit 222, and the adjusted voltage value can be obtained by adding Y ' ═ a × X and B by the second adder 225. The slope of the first amplifying circuit 221, i.e. the amplification factor, and the intercept of the reference voltage divider circuit 222 need to be selected according to the temperature characteristic of the detector 31, and the temperature compensation module 02 actually adjusts the voltage output by the temperature sensing circuit 21, so that the relationship between the voltage output by the temperature compensation circuit and the temperature is basically consistent with the relationship between the output of the detector 31 and the temperature under a certain set output power condition. For example, at the same output power, the detector 31 outputs a voltage Y' ═ a × X + B; it is only necessary to make the output voltage Y of the temperature compensation module 02 be a × X + B, and make the value of Y' be relatively close to that of Y, wherein the value of the output voltage A, B of the detector 31 can be obtained by measurement, and after the value of A, B is obtained, the specific parameters of the amplification factor of the first amplification circuit 221 and the intercept of the dc offset can be obtained. There may also be relevant data for the value of the output voltage A, B of the detector 31 that may be in the device manual. The fixed voltage value is adjusted according to the value of the reference voltage value obtained from the reference voltage value chip.
The voltage reference circuit 23 is configured to output a preset voltage reference value.
The first adder 24 is configured to add the adjusted voltage value to a preset voltage reference value, and output the compensated voltage signal.
In this embodiment, the first adder 24 outputs a preset fixed value, where the preset fixed value is obtained by adding the adjusted voltage value and a preset voltage reference value, and is used for the error control module 03 to adjust the amplitude of the input signal of the signal link module 01 according to the preset fixed value and the coupled rf power signal output by the detector 31.
In one embodiment, the voltage reference circuit 23 includes:
the chip is used for outputting a preset voltage reference value, wherein the preset voltage reference value does not change along with the temperature.
In this embodiment, the voltage reference circuit is an integrated chip, and the output voltage value is not changed with temperature and is very stable.
In one embodiment, the error control module 03 includes a detector 31, a differential amplifier 32, and an integrator 33, which will be described in detail below.
The detector 31 is configured to receive the coupled rf power signal and convert the coupled rf power signal into a dc detection voltage signal.
The differential amplifier 32 is configured to differentially amplify the dc detection voltage signal and the compensated voltage signal, and output a differentially amplified signal.
The integrator 33 is configured to perform an integration operation on the differential amplified signal, and output a control signal.
In this embodiment, the detector 31 converts the signal energy coupled by the directional coupler 13 into a dc voltage, the differential amplifier 32 compares and amplifies the voltage output by the detector 31 and the voltage output by the temperature compensation module 02, and outputs a control voltage through the integrator 33 to control the attenuation of the voltage-controlled attenuator 11, so as to control the total gain of the main link.
In one embodiment, the detector 31 is disposed at the periphery of the temperature sensing circuit 21 for thermal coupling.
In this embodiment, the temperature sensing circuit 21 and the detector 31 are placed close to each other and thermally coupled to each other, so that the temperature of the detector and the temperature sensing circuit 21 are the same, the output voltage of the detector 31 changes at different environmental temperatures, and the detector 31 itself is affected by the temperature, so that the temperature sensing circuit 21 placed close to each other can monitor the change of the environment around the detector in real time.
In this embodiment, the amplitude of the main link signal output of the signal link module 01 will change with the change of the ambient temperature, the detector 31 will detect the change, and the detector 31 itself will be affected by the temperature, therefore, under different ambient temperatures, the output voltage value of the detector 31 will change, the output voltage value of the temperature compensation module 02 will enter the error control link with the output of the detector 31, the error control circuit will perform error amplification on the two voltage values, the integrator 33 will integrate the error signal, the output voltage value of the integrator 33 will change continuously from low to high or from high to low, the integrator 33 will output a corresponding control signal to control the attenuation value of the voltage-controlled attenuator 11 to increase or decrease continuously, the gain change direction of the main link of the signal link module 01 controlled by the error control module 03 is exactly opposite to the change direction of the main link gain of the signal link module 01 under the influence of the temperature, that the final compensation condition of the temperature compensation module 02 and the detector 31 output voltage value of the temperature are not equal, that the output of the main link module X + the temperature is equal to the power of the voltage value of the voltage detector 31, the voltage of the main link module X + of the voltage detector 31, the voltage of the voltage control of the voltage control of the voltage control of the voltage control of the voltage control of the voltage of the.
It should be noted that the temperature sensing circuit, the voltage reference circuit, the adder, the amplifier, the integrator, the detector, the differential amplifier, the voltage-controlled attenuator, the directional coupler and the voltage reference circuit related to the embodiments of the present invention can be implemented by using the existing circuit structure as long as they can perform corresponding functions, that is, the temperature sensing circuit can output a corresponding voltage value by detecting the temperature, and the specific implementation manners of the temperature sensing circuit, the voltage reference circuit, the adder, the amplifier, the integrator, the detector, the differential amplifier, the voltage-controlled attenuator, the directional coupler and the voltage reference circuit related thereto are not specifically limited.
The implementation of the embodiment has the following outstanding characteristics:
an automatic amplitude stabilizing circuit with temperature compensation comprises a signal link module 01 for receiving input signals, and attenuates the input signal according to a control signal to adjust the amplitude of the input signal, amplifies the adjusted input signal and outputs the amplified input signal as a link output signal, and part of the output signals are coupled, the coupled radio frequency power signals are output, the temperature compensation module 02, for compensating a preset voltage reference value according to the detected temperature, outputting a compensated voltage signal, an error control module 03, for converting the coupled RF power signal into a DC detection voltage signal and outputting the control signal according to a difference between the DC detection voltage signal and the compensated voltage signal, so that the amplitudes of the coupled rf power signal and the compensated voltage signal output by the signal link module 01 are consistent. The temperature compensation module 02 outputs a fixed voltage value, so that the error control module 03 adjusts the coupled radio frequency power signal output by the signal link module 01 according to the fixed voltage value, i.e., the compensated voltage signal, the control signal controls the gain of the signal link, and prevents the signal link from changing in gain due to temperature change, so that the signal link gain is constant, the output power is constant, and the loop enters a stable state. So that the amplitude of the DC detection voltage signal is consistent with that of the compensated voltage signal. The circuit is in a closed-loop negative feedback state by adopting a pure hardware control mode, can compensate in real time, and has a simple circuit structure without a complex compensation algorithm.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.
Claims (8)
1. An automatic amplitude stabilizing circuit with temperature compensation, comprising:
the signal link module is used for receiving an input signal, attenuating the input signal according to a control signal to adjust the amplitude of the input signal, amplifying the adjusted input signal to serve as a link output signal to be output, coupling part of the output signal, and outputting a coupled radio frequency power signal;
the temperature compensation module is used for compensating a preset voltage reference value according to the detected temperature and outputting a compensated voltage signal;
and the error control module is used for converting the coupled radio-frequency power signal into a direct-current detection voltage signal and outputting the control signal according to the difference value between the direct-current detection voltage signal and the compensated voltage signal so as to enable the amplitude of the direct-current detection voltage signal to be consistent with that of the compensated voltage signal.
2. The automatic amplitude stabilizing circuit with temperature compensation of claim 1, wherein the temperature compensation module comprises:
the temperature sensing circuit is used for outputting a corresponding voltage value according to the ambient temperature;
the adjusting circuit is used for adjusting the voltage value output by the temperature sensing circuit according to the slope value of the voltage value output by the temperature sensing circuit along with the temperature change speed and the intercept value output by the temperature sensing circuit when the voltage value is at zero centigrade to output the adjusted voltage value;
the voltage reference circuit is used for outputting a preset voltage reference value;
and the first adder is used for adding the adjusted voltage value and a preset voltage reference value and outputting the compensated voltage signal.
3. The temperature compensated auto-amplitude stabilization circuit of claim 1 or 2, wherein the error control module comprises:
the detector is used for receiving the coupled radio frequency power signal and converting the coupled radio frequency power signal into a direct current detection voltage signal;
the differential amplifier is used for carrying out differential amplification on the direct current detection voltage signal and the compensated voltage signal and outputting a differential amplification signal;
and the integrator is used for performing integration operation on the differential amplification signal and outputting a control signal.
4. The temperature compensated auto-amplitude stabilization circuit of claim 3, wherein the detectors are disposed at a periphery of the temperature sensing circuit for thermal coupling.
5. The temperature compensated auto-amplitude stabilization circuit of claim 2, wherein the adjustment circuit comprises:
the first amplifying circuit is used for multiplying the slope value by the voltage value output by the temperature sensing circuit to obtain a slope voltage adjusting value;
the reference voltage division circuit is used for outputting the intercept value;
and the second adder is used for adding the slope voltage adjustment value and the intercept value and outputting the adjusted voltage value.
6. The automatic amplitude stabilization circuit with temperature compensation of claim 1, 2, 4 or 5, wherein the signal link module comprises:
the voltage-controlled attenuator is used for receiving an input signal and attenuating the input signal according to the control signal so as to adjust the amplitude of the input signal;
a first amplifier for amplifying the attenuated signal;
and the directional coupler is used for receiving the amplified signals, coupling part of the amplified signals to output coupled radio frequency power signals, and outputting the other part of the amplified signals as link output signals.
7. The temperature compensated auto-amplitude stabilization circuit of claim 2, 4 or 5, wherein the voltage reference circuit comprises:
the chip is used for outputting a preset voltage reference value, wherein the preset voltage reference value does not change along with the temperature.
8. The temperature compensated auto-amplitude stabilization circuit of claim 5, wherein the reference voltage divider circuit comprises:
the fixed voltage circuit is used for providing a preset fixed voltage signal;
and the resistance voltage division circuit is used for dividing the preset fixed voltage signal and outputting the intercept value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921127928.0U CN210155570U (en) | 2019-07-17 | 2019-07-17 | Automatic amplitude stabilizing circuit with temperature compensation |
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| CN201921127928.0U CN210155570U (en) | 2019-07-17 | 2019-07-17 | Automatic amplitude stabilizing circuit with temperature compensation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946337A (en) * | 2021-05-13 | 2021-06-11 | 深圳市鼎阳科技股份有限公司 | High-precision signal measuring method and digital oscilloscope |
| CN115133939A (en) * | 2021-03-24 | 2022-09-30 | 海能达通信股份有限公司 | Transmitter and communication device |
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2019
- 2019-07-17 CN CN201921127928.0U patent/CN210155570U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115133939A (en) * | 2021-03-24 | 2022-09-30 | 海能达通信股份有限公司 | Transmitter and communication device |
| CN115133939B (en) * | 2021-03-24 | 2023-12-12 | 海能达通信股份有限公司 | Transmitter and communication device |
| CN112946337A (en) * | 2021-05-13 | 2021-06-11 | 深圳市鼎阳科技股份有限公司 | High-precision signal measuring method and digital oscilloscope |
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