Temperature compensation system for broadband frequency modulation circuit

Abstract

The invention discloses a temperature compensation system for a broadband frequency modulation circuit, and relates to the technical field of integrated circuits, and the system comprises a temperature change characteristic testing module which is used for testing the tuning voltage temperature change characteristic of a voltage-controlled oscillator. And the thermistor configuration module is used for selecting a thermosensitive compensation resistor according to the tuning voltage temperature change characteristic. And the comprehensive simulation calculation module is used for performing a simulation test based on the tuning voltage temperature change characteristic and the thermosensitive compensation resistor to obtain a bias resistor set. And the compensation configuration module constructs a temperature compensation circuit according to the thermosensitive compensation resistor and the bias resistor data set. And the voltage compensation and synthesis module activates a temperature compensation circuit, performs temperature compensation of the initial frequency and the frequency modulation bandwidth, transmits a compensation result to the summator, and obtains a compensation voltage signal. And the compensation output module transmits the compensation voltage signal to the voltage-controlled oscillator for broadband frequency modulation. Therefore, the technical effects of online monitoring, complete monitoring and good early warning capability are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of integrated circuits, and in particular to a temperature compensation system for a broadband frequency modulation circuit. Background Art

[0002] In broadband frequency modulation circuits, temperature changes can affect the circuit's operating performance, especially the center frequency and frequency modulation bandwidth. Existing temperature compensation methods, such as temperature-compensated crystal oscillators, mainly compensate for the output frequency, but their operating bandwidth is a fixed frequency mode and cannot take into account the temperature changes of the center frequency and frequency modulation bandwidth at the same time. There are technical problems such as high compensation difficulty and low compensation accuracy. Summary of the invention

[0003] The present invention provides a temperature compensation system for a broadband frequency modulation circuit to solve the technical problems of great compensation difficulty and low compensation accuracy in the prior art, and achieve the technical effect of improving compensation accuracy and reducing compensation difficulty.

[0004] The present invention provides a temperature compensation system for a broadband frequency modulation circuit, comprising:

[0005] A temperature variation characteristic test module, the temperature variation characteristic test module is used to test and obtain the temperature variation characteristic of the tuning voltage of the voltage-controlled oscillator; a thermistor configuration module, the thermistor configuration module is used to select a thermistor compensation resistor according to the temperature variation characteristic of the tuning voltage; a comprehensive simulation calculation module, the comprehensive simulation calculation module is used to perform simulation testing based on the temperature variation characteristic of the tuning voltage and the thermistor compensation resistor to obtain a bias resistor set, wherein the bias resistor set includes a frequency compensation resistor set and a bandwidth compensation resistor set; a compensation configuration module, the compensation configuration module is used to construct a temperature compensation circuit according to the thermistor compensation resistor and the bias resistor data set, wherein the temperature compensation circuit includes a starting frequency compensation circuit and a frequency modulation bandwidth compensation circuit; a voltage compensation and synthesis module, the voltage compensation and synthesis module is used to activate the temperature compensation circuit, perform temperature compensation of the starting frequency and the frequency modulation bandwidth, and transmit the compensation result to the adder to obtain a compensation voltage signal; a compensation output module, the compensation output module is used to transmit the compensation voltage signal to the voltage-controlled oscillator for broadband frequency modulation.

[0006] The present invention discloses a temperature compensation system for a broadband frequency modulation circuit, including: a temperature variation characteristic test module: testing the temperature variation characteristic of the tuning voltage of a voltage-controlled oscillator. A thermistor configuration module: selecting a suitable thermistor according to the temperature variation characteristic of the tuning voltage. A comprehensive simulation calculation module: performing simulation tests based on the temperature variation characteristic of the tuning voltage and the thermistor to obtain a bias resistor set, including a frequency compensation resistor set and a bandwidth compensation resistor set. A compensation configuration module: constructing a temperature compensation circuit according to the thermistor and the bias resistor data sets, including a starting frequency compensation circuit and a frequency modulation bandwidth compensation circuit. A voltage compensation and synthesis module: activating the temperature compensation circuit, performing temperature compensation of the starting frequency and the frequency modulation bandwidth, and obtaining a compensation voltage signal through an adder. A compensation output module: transmitting the compensation voltage signal to the voltage-controlled oscillator to realize broadband frequency modulation. The temperature compensation system for a broadband frequency modulation circuit disclosed by the present invention solves the technical problems of high compensation difficulty and low compensation accuracy, and achieves the technical effects of improving compensation accuracy and reducing compensation difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural schematic diagram of a temperature compensation system for a broadband frequency modulation circuit according to the present invention;

[0008] Figure 2 A schematic diagram of a flow chart of obtaining temperature variation characteristics of a tuning voltage in a temperature compensation system for a broadband frequency modulation circuit according to the present invention;

[0009] Figure 3 The present invention is a temperature compensation circuit schematic diagram of a temperature compensation system for a broadband frequency modulation circuit.

[0010] Explanation of the accompanying drawings: temperature variation characteristic test module 11, thermistor configuration module 12, comprehensive simulation calculation module 13, compensation configuration module 14, voltage compensation and synthesis module 15, compensation output module 16, thermistor compensation resistor RT, bias resistor R1, bias resistor R2, bias resistor R3. DETAILED DESCRIPTION

[0011] The technical solution provided in the embodiments of the present invention is to solve the technical problems of great compensation difficulty and low compensation accuracy in the prior art. The overall idea adopted is as follows:

[0012] First, the temperature variation characteristic test module tests and obtains the temperature variation characteristic of the tuning voltage of the voltage-controlled oscillator. Then, the thermistor configuration module selects the thermistor compensation resistor according to the temperature variation characteristic of the tuning voltage. Then, the comprehensive simulation calculation module performs simulation testing based on the temperature variation characteristic of the tuning voltage and the thermistor compensation resistor to obtain a bias resistor set, wherein the bias resistor set includes a frequency compensation resistor set and a bandwidth compensation resistor set. Next, the compensation configuration module constructs a temperature compensation circuit according to the thermistor compensation resistor and the bias resistor data set, wherein the temperature compensation circuit includes a starting frequency compensation circuit and a frequency modulation bandwidth compensation circuit. Furthermore, the voltage compensation and synthesis module activates the temperature compensation circuit, performs temperature compensation for the starting frequency and the frequency modulation bandwidth, and transmits the compensation result to the adder to obtain a compensation voltage signal. Finally, the compensation output module is used to transmit the compensation voltage signal to the voltage-controlled oscillator for broadband frequency modulation.

[0013] The above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods of the specification to better understand the above technical solution. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments of the present invention. It should be understood that the present invention is not limited to the example embodiments used only to explain the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In addition, it should be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings, rather than all of them.

[0014] Embodiment 1

[0015] Figure 1 The present invention is a schematic diagram of a temperature compensation system for a broadband frequency modulation circuit, wherein the system comprises:

[0016] The temperature variation characteristic testing module 11 is used to test and obtain the temperature variation characteristic of the tuning voltage of the voltage controlled oscillator.

[0017] Specifically, testing and obtaining the temperature variation characteristics of the tuning voltage of a voltage-controlled oscillator (VCO) is to understand the frequency stability and response characteristics of the VCO under different temperature conditions, which is part of evaluating the performance of the VCO in practical applications.

[0018] Specifically, the test content includes the starting frequency variation range and frequency modulation bandwidth variation range of the VCO under high and low temperature conditions, so as to determine whether the voltage-controlled oscillator meets the requirements of the target scenario.

[0019] In some embodiments, the test is performed to obtain the temperature variation characteristics of the tuning voltage of the voltage controlled oscillator, and the execution steps include:

[0020] Based on the target working scenario of the voltage-controlled oscillator, the scenario temperature domain is extracted;

[0021] According to the preset compensation control granularity and in combination with the scene temperature domain, a calibration temperature sequence is obtained;

[0022] According to the calibration temperature sequence, a variable temperature test is performed on the voltage controlled oscillator to obtain the temperature variation characteristics of the tuning voltage, wherein the temperature variation characteristics of the tuning voltage include a starting frequency tuning voltage sequence, an end frequency tuning voltage sequence, and a tuning voltage difference sequence.

[0023] Specifically, first, determine the actual working scenario of the VCO, and based on the target working scenario, define the lowest and highest temperatures that may be encountered to form a temperature domain. For example, some application scenarios may require operation within a temperature range of -40°C to 85°C. Then, according to the sensitivity of the application scenario to temperature changes, set the degree of precision of temperature control. For example, set measurements at temperature points every 5°C to obtain detailed temperature dependency data. Furthermore, combining the scenario temperature domain and compensation control granularity, generate a series of calibration temperature points, such as: [-40°C, -35°C, -30°C, ..., 80°C, 85°C].

[0024] Specifically, the voltage-controlled oscillator is subjected to a variable temperature test. First, the test equipment is prepared, including a voltage-controlled oscillator (VCO), a temperature control box for accurately controlling and adjusting the temperature, a precision voltage source, a tuning voltage, a frequency meter or a spectrum analyzer for measuring the output frequency, and a temperature sensor to monitor and record the temperature around the VCO. Then, at each calibration temperature point in the calibration temperature sequence, a starting tuning voltage is applied and the starting frequency of the VCO is recorded. A starting frequency tuning voltage sequence is formed. Furthermore, based on the starting frequency tuning voltage sequence, the tuning voltage is gradually increased to a maximum value, and the frequency of the VCO is synchronously recorded. An end frequency tuning voltage sequence is formed. Finally, for each temperature point, the tuning voltage difference between the starting frequency and the end frequency is calculated and recorded as a tuning voltage difference sequence.

[0025] Specifically, the starting frequency tuning voltage sequence, the end frequency tuning voltage sequence and the tuning voltage difference sequence at all calibration temperature points are summarized to obtain the tuning voltage temperature variation characteristic.

[0026] In some implementations, such as Figure 2 As shown, according to the calibration temperature sequence, a variable temperature test is performed on the voltage controlled oscillator to obtain the temperature variation characteristics of the tuning voltage, and the execution steps include:

[0027] According to the calibration temperature sequence, setting a variable temperature test environment;

[0028] activating a voltage-controlled oscillator in the variable temperature test environment, continuously adjusting a tuning voltage, and monitoring and recording tuning response data, wherein the tuning response data includes a tuning voltage and a corresponding output frequency;

[0029] Traversing the calibration temperature sequence, obtaining the tuning response data at multiple temperatures, and obtaining a tuning response data set;

[0030] Taking the starting frequency of the voltage-controlled oscillator as an index constraint, extracting the starting frequency tuning voltage sequence from the tuning response data set, and taking the ending frequency of the voltage-controlled oscillator as an index constraint, extracting the ending frequency tuning voltage sequence from the tuning response data set;

[0031] A tuning voltage difference sequence is calculated and acquired according to the starting frequency tuning voltage sequence and the ending frequency tuning voltage sequence.

[0032] Specifically, first, use a temperature control box and other equipment to set the temperature of the test environment to ensure that the ambient temperature can cover all temperature points in the calibration temperature sequence, and the temperature at each temperature point is stable, reducing the impact of environmental fluctuations on the test results. Then, at each temperature point, gradually adjust the tuning voltage from the lowest to the highest voltage range, and record the response of the VCO (that is, the corresponding output frequency). Exemplarily, use a spectrum analyzer and other equipment to monitor the output frequency, record the tuning voltage and the corresponding output frequency data, save the tuning response data at each temperature point, and form a data set. Then, perform the above steps for each temperature point until the entire calibration temperature sequence is covered. Ensure that the tuning voltage and frequency data at different temperatures are complete.

[0033] Specifically, in the tuning response data set, the starting frequency of the VCO is used as an index to extract the corresponding tuning voltage data to form a starting frequency tuning voltage sequence. The starting frequency tuning voltage sequence reflects the tuning voltage required to achieve a given starting frequency under different ambient temperatures. Similarly, the end frequency of the VCO is used as an index to extract the corresponding tuning voltage data to form an end frequency tuning voltage sequence.

[0034] Specifically, according to the starting frequency tuning voltage and the end frequency tuning voltage at different temperature points, the corresponding tuning voltage difference is calculated, and the tuning voltage difference at each temperature point is recorded to form a tuning voltage difference sequence.

[0035] Through the above steps, the temperature variation characteristic data of the tuning voltage of the VCO at different temperatures can be obtained, which provides necessary reference for designing temperature compensation circuits, optimizing system performance, and predicting the working state of the VCO.

[0036] The thermistor configuration module 12 is used to select a thermistor compensation resistor according to the temperature variation characteristics of the tuning voltage.

[0037] In some embodiments, according to the temperature variation characteristics of the tuning voltage, a thermistor compensation resistor is selected, and the execution steps include:

[0038] Determining a first thermistor according to the starting frequency tuning voltage sequence;

[0039] According to the tuned voltage difference sequence, a pressure difference fluctuation sequence is calculated and obtained, and based on the pressure difference fluctuation sequence, a second thermistor is determined;

[0040] The first thermistor and the second thermistor are output as the thermistor compensation resistor.

[0041] Specifically, the tuning voltage changes corresponding to the starting frequency at different temperatures are analyzed to determine the trend and amplitude of the voltage change with temperature. Then, based on the above analysis results, a thermistor with a corresponding temperature coefficient is selected to provide compensation when the voltage changes with temperature. The main purpose of selecting the first thermistor is to stabilize the starting frequency so that it remains relatively stable when the temperature changes.

[0042] Specifically, the pressure difference fluctuation sequence is calculated based on the tuning voltage difference sequence at different temperatures. This sequence reflects how the amplitude of the tuning voltage changes with temperature. In other words, the pressure difference fluctuation sequence reflects the change in the voltage adjustment interval corresponding to the starting frequency and the end frequency at different temperatures. Then, the changing trend of the pressure difference fluctuation is analyzed to determine the impact of temperature change on the voltage difference, and a thermistor with an appropriate temperature coefficient is selected to compensate for the temperature dependence of the voltage difference. The role of the second thermistor is to adjust the stability of the frequency range so that the tuning range remains as consistent as possible at different temperatures.

[0043] Through the above steps, a suitable thermistor compensation resistor RT can be selected, which helps the voltage-controlled oscillator maintain a stable starting frequency and tuning range when the temperature changes. The first thermistor is mainly used for temperature compensation of the starting frequency, and the second thermistor is used for compensation of the tuning range. The two work together to effectively reduce the impact of temperature on VCO performance.

[0044] In some embodiments, after selecting the thermistor compensation resistor according to the temperature variation characteristic of the tuning voltage, the execution step further includes:

[0045] Obtaining temperature-resistance characteristic curves of the first thermistor and the second thermistor, and outputting the curves as a thermistor characteristic set;

[0046] Based on the thermal characteristic set, extracting a first thermal resistance value sequence and a second thermal resistance value sequence;

[0047] Establishing an association relationship between the first thermistor resistance sequence, the second thermistor resistance sequence and the thermistor compensation resistor.

[0048] Specifically, the resistance values ​​of the first thermistor at different temperatures are measured and recorded to generate a corresponding temperature-resistance characteristic curve, and the resistance values ​​of the second thermistor at different temperatures are measured and recorded to generate a corresponding temperature-resistance characteristic curve.

[0049] Specifically, according to the temperature-resistance characteristic curve of the first thermistor, a resistance sequence at a specific temperature point is extracted. This sequence reflects the influence of temperature change on the resistance of the first thermistor. According to the temperature-resistance characteristic curve of the second thermistor, a resistance sequence at a specific temperature point is extracted. This sequence reflects the influence of temperature change on the resistance of the second thermistor.

[0050] Furthermore, the thermistor is a thermistor with a negative temperature coefficient.

[0051] Specifically, a negative temperature coefficient (NTC) thermistor is used to compensate for the frequency drift of the voltage-controlled oscillator when the temperature changes. When the temperature decreases, the output frequency of the VCO will increase. At this time, the resistance of the NTC thermistor increases, resulting in a decrease in the bias voltage. This in turn leads to a decrease in the tuning voltage, which causes the output frequency of the VCO to decrease relatively, thereby compensating for the frequency increase caused by low temperature and maintaining frequency stability. When the temperature rises, the output frequency of the VCO will decrease. At this time, the resistance of the NTC thermistor decreases, causing the bias voltage to increase. This increase in tuning voltage will cause the output frequency of the VCO to increase relatively, thereby compensating for the frequency decrease caused by high temperature and maintaining the stability of the output frequency.

[0052] The comprehensive simulation calculation module 13 is used to perform simulation test based on the temperature variation characteristics of the tuning voltage and the thermistor compensation resistor to obtain a bias resistor set, wherein the bias resistor set includes a frequency compensation resistor set and a bandwidth compensation resistor set.

[0053] Specifically, in order to ensure the stability of the bias voltage of the voltage-controlled oscillator (VCO) at different temperatures and achieve effective frequency and bandwidth compensation, a suitable bias resistor set is selected through simulation testing. The bias resistor set includes a frequency compensation resistor set and a bandwidth compensation resistor set, which are respectively used to compensate for the voltage difference between the tuning voltage of the starting frequency and the frequency modulation bandwidth.

[0054] In some embodiments, Figure 3 As shown, based on the temperature variation characteristics of the tuning voltage and the thermistor compensation resistor, a simulation test is performed to obtain a bias resistor set, and the execution steps include:

[0055] Based on the temperature compensation circuit, construct a simulation test environment;

[0056] Initializing the simulation test environment according to the temperature variation characteristic of the tuning voltage and the first thermistor resistance sequence, and performing simulation calculation to obtain the frequency compensation resistor set;

[0057] Initializing the simulation test environment according to the tuning voltage temperature variation characteristic and the second thermistor resistance sequence, performing simulation calculation, and obtaining the bandwidth compensation resistor set;

[0058] The frequency compensation resistor set and the bandwidth compensation resistor set are output as the bias resistor set.

[0059] Specifically, first, a complete simulation test environment is built based on the temperature compensation circuit of the voltage-controlled oscillator (VCO). This includes building a complete circuit model, including the circuit models of thermistor (RT) and fixed resistors (R1, R2, R3), setting the power supply voltage and other necessary circuit components. Then, based on the tuning voltage temperature variation characteristic curve, the temperature-resistance relationship of the first thermistor is extracted. Initialize the thermistor model in the simulation environment so that it has this characteristic. Next, run the simulation, adjust the resistance values ​​of R1, R2, and R3, and observe the frequency changes at different temperatures. Record the frequency compensation effect corresponding to each resistance combination, and finally obtain the frequency compensation resistor set.

[0060] Similarly, based on the tuning voltage difference sequence, the temperature-resistance relationship of the second thermistor is extracted, and the thermistor model in the simulation environment is updated. The simulation is run, the resistance values ​​of R1, R2, and R3 are adjusted, and the bandwidth changes at different temperatures are observed. The bandwidth compensation effect corresponding to each resistance combination is recorded, and finally a bandwidth compensation resistor set is obtained.

[0061] Finally, the frequency compensation resistor set and the bandwidth compensation resistor set are combined to output the final bias resistor set to ensure that the circuit can operate stably in all operating temperature ranges and compensate for the frequency and bandwidth drift caused by temperature changes.

[0062] The compensation configuration module 14 is used to construct a temperature compensation circuit according to the thermistor compensation resistor and the bias resistor data set, wherein the temperature compensation circuit includes a starting frequency compensation circuit and a frequency modulation bandwidth compensation circuit.

[0063] Specifically, the temperature compensation circuit includes a starting frequency compensation circuit and a frequency modulation bandwidth compensation circuit, which are respectively used to compensate for a starting tuning voltage and a tuning voltage difference of a voltage controlled oscillator (VCO).

[0064] Specifically, the starting frequency compensation circuit and the frequency modulation bandwidth compensation circuit are two independent circuits in parallel, and the outputs of the starting frequency compensation circuit and the frequency modulation bandwidth compensation circuit are superimposed through an adder to obtain a final tuning voltage output.

[0065] Specifically, the initial frequency compensation circuit and the frequency modulation bandwidth compensation circuit have the same structure, and both include a bias resistor R2 connected in parallel with the thermistor RT, and bias resistors R1 and R3 connected in series with the thermistor RT.

[0066] The voltage compensation and synthesis module 15 is used to activate the temperature compensation circuit, perform temperature compensation of the starting frequency and the frequency modulation bandwidth, and transmit the compensation result to the adder to obtain a compensation voltage signal.

[0067] Specifically, the compensation results of the temperature compensation of the starting frequency and the frequency modulation bandwidth will be converted into a voltage signal and transmitted to the adder. The function of the adder is to synthesize the compensation voltage signals from different sources to generate a comprehensive compensation voltage signal. This compensation voltage signal can be used to adjust the frequency of the voltage-controlled oscillator to further optimize the performance of the device.

[0068] Exemplarily, the adder includes four resistors and an op amp, including two input resistors and two output resistors, and the resistance values ​​of the four resistors are the same. At this time, when the signal is synthesized through the two input resistors, the voltage will be reduced to half of the original. Then, the two output resistors and the op amp form a common-phase amplifier circuit with a gain of 2, so that the original voltage value can be restored. In other words, the total gain of the entire adder circuit is designed to be 1, and the input voltage signal will be transmitted to the output at the original value.

[0069] In some embodiments, before transmitting the compensation result to the adder to obtain the compensation voltage signal, the execution step further includes:

[0070] Constructing an emitter-follower conversion module, wherein the emitter-follower conversion module comprises a first emitter-follower conversion circuit and a second emitter-follower conversion circuit;

[0071] connecting the input end of the first emitter-follower conversion circuit and the output end of the starting frequency compensation circuit, and the output end of the first emitter-follower conversion circuit and the input end of the adder;

[0072] An input end of the second radio-follower conversion circuit is connected to an output end of the frequency modulation bandwidth compensation circuit, and an output end of the second radio-follower conversion circuit is connected to an input end of the adder.

[0073] Specifically, since the compensation voltage output by the starting frequency compensation circuit and the frequency modulation bandwidth compensation circuit is generated by a resistor voltage divider circuit with high impedance, load changes will have a greater impact on the compensation voltage, resulting in an increase in compensation error. Therefore, it is processed by an emitter-follower circuit composed of an operational amplifier and converted into a low-impedance circuit. In other words, the emitter-follower circuit acts as a load of the resistor voltage divider compensation circuit, and the impact on the output voltage of the compensation circuit is minimized.

[0074] The compensation output module 16 is used to transmit the compensation voltage signal to a voltage-controlled oscillator for broadband frequency modulation.

[0075] Finally, the compensation voltage signal is transmitted to the tuning end of the voltage controlled oscillator to adjust the frequency of the VCO, thereby frequency modulating the broadband. In the above manner, the frequency of the VCO is automatically adjusted according to the change of the ambient temperature to maintain the performance and stability of the equipment and improve the quality and reliability of the signal.

[0076] In summary, the temperature compensation system for a broadband frequency modulation circuit provided by the present invention has the following technical effects:

[0077] Temperature variation characteristic test module: Test the temperature variation characteristic of the tuning voltage of the voltage-controlled oscillator. Thermistor configuration module: Select a suitable thermistor compensation resistor according to the temperature variation characteristic of the tuning voltage. Comprehensive simulation calculation module: Perform simulation tests based on the temperature variation characteristic of the tuning voltage and thermistor compensation resistor to obtain a bias resistor set, including a frequency compensation resistor set and a bandwidth compensation resistor set. Compensation configuration module: Construct a temperature compensation circuit based on the thermistor compensation resistor and bias resistor data sets, including a starting frequency compensation circuit and a frequency modulation bandwidth compensation circuit. Voltage compensation and synthesis module: Activate the temperature compensation circuit, perform temperature compensation for the starting frequency and frequency modulation bandwidth, and obtain the compensation voltage signal through the adder. Compensation output module: Transmit the compensation voltage signal to the voltage-controlled oscillator to achieve broadband frequency modulation. Thereby achieving the technical effect of improving compensation accuracy and reducing compensation difficulty.

[0078] It should be understood that the embodiments disclosed in the present invention and the above description can enable those skilled in the art to use the present invention to implement the present invention. At the same time, the present invention is not limited to the above-mentioned embodiments. It should be understood that those skilled in the art can still modify the technical solutions recorded in the above-mentioned embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. A temperature compensation system for a broadband frequency modulation circuit, characterized in that: The system is applied to a temperature compensation circuit for a broadband frequency modulation circuit, and the system comprises: A temperature variation characteristic test module, wherein the temperature variation characteristic test module is used to test and obtain the temperature variation characteristic of the tuning voltage of the voltage controlled oscillator; A thermistor configuration module, the thermistor configuration module is used to select a thermistor compensation resistor according to the temperature variation characteristics of the tuning voltage; A comprehensive simulation calculation module, the comprehensive simulation calculation module is used to perform simulation test based on the temperature variation characteristics of the tuning voltage and the thermistor compensation resistor to obtain a bias resistor set, wherein the bias resistor set includes a frequency compensation resistor set and a bandwidth compensation resistor set; A compensation configuration module, the compensation configuration module is used to construct a temperature compensation circuit according to the thermistor compensation resistor and the bias resistor data set, wherein the temperature compensation circuit includes a starting frequency compensation circuit and a frequency modulation bandwidth compensation circuit; A voltage compensation and synthesis module, which is used to activate the temperature compensation circuit, perform temperature compensation of the starting frequency and the frequency modulation bandwidth, and transmit the compensation result to the adder to obtain a compensation voltage signal; A compensation output module is used to transmit the compensation voltage signal to a voltage-controlled oscillator for broadband frequency modulation.

2. A temperature compensation system for a broadband frequency modulation circuit as claimed in claim 1, characterized in that: The test obtains the temperature variation characteristics of the tuning voltage of the voltage controlled oscillator, and the execution steps include: Based on the target working scenario of the voltage-controlled oscillator, the scenario temperature domain is extracted; According to the preset compensation control granularity and in combination with the scene temperature domain, a calibration temperature sequence is obtained; According to the calibration temperature sequence, a variable temperature test is performed on the voltage controlled oscillator to obtain the temperature variation characteristics of the tuning voltage, wherein the temperature variation characteristics of the tuning voltage include a starting frequency tuning voltage sequence, an end frequency tuning voltage sequence, and a tuning voltage difference sequence.

3. A temperature compensation system for a broadband frequency modulation circuit as claimed in claim 2, characterized in that: According to the calibration temperature sequence, a variable temperature test is performed on the voltage controlled oscillator to obtain the temperature variation characteristics of the tuning voltage, and the execution steps include: According to the calibration temperature sequence, setting a variable temperature test environment; activating a voltage-controlled oscillator in the variable temperature test environment, continuously adjusting a tuning voltage, and monitoring and recording tuning response data, wherein the tuning response data includes a tuning voltage and a corresponding output frequency; Traversing the calibration temperature sequence, obtaining the tuning response data at multiple temperatures, and obtaining a tuning response data set; Taking the starting frequency of the voltage-controlled oscillator as an index constraint, extracting the starting frequency tuning voltage sequence from the tuning response data set, and taking the ending frequency of the voltage-controlled oscillator as an index constraint, extracting the ending frequency tuning voltage sequence from the tuning response data set; A tuning voltage difference sequence is calculated and acquired according to the starting frequency tuning voltage sequence and the ending frequency tuning voltage sequence.

4. A temperature compensation system for a broadband frequency modulation circuit as claimed in claim 3, characterized in that: According to the temperature variation characteristics of the tuning voltage, a thermistor compensation resistor is selected, and the execution steps include: Determining a first thermistor according to the starting frequency tuning voltage sequence; According to the tuned voltage difference sequence, a pressure difference fluctuation sequence is calculated and obtained, and based on the pressure difference fluctuation sequence, a second thermistor is determined; The first thermistor and the second thermistor are output as the thermistor compensation resistor.

5. A temperature compensation system for a broadband frequency modulation circuit as claimed in claim 4, characterized in that: After selecting the thermistor compensation resistor according to the temperature variation characteristic of the tuning voltage, the execution step further includes: Obtaining temperature-resistance characteristic curves of the first thermistor and the second thermistor, and outputting the curves as a thermistor characteristic set; Based on the thermal characteristic set, extracting a first thermal resistance value sequence and a second thermal resistance value sequence; An association relationship between the first thermistor resistance sequence, the second thermistor resistance sequence and the thermistor compensation resistor is established.

6. A temperature compensation system for a broadband frequency modulation circuit as claimed in claim 5, characterized in that: Based on the temperature variation characteristics of the tuning voltage and the thermistor compensation resistor, a simulation test is performed to obtain a bias resistor set, and the execution steps include: Based on the temperature compensation circuit, construct a simulation test environment; Initializing the simulation test environment according to the temperature variation characteristic of the tuning voltage and the first thermistor resistance sequence, and performing simulation calculation to obtain the frequency compensation resistor set; Initializing the simulation test environment according to the tuning voltage temperature variation characteristic and the second thermistor resistance sequence, performing simulation calculation, and obtaining the bandwidth compensation resistor set; The frequency compensation resistor set and the bandwidth compensation resistor set are output as the bias resistor set.

7. A temperature compensation system for a broadband frequency modulation circuit as claimed in claim 6, characterized in that: Before transmitting the compensation result to the adder to obtain the compensation voltage signal, the execution steps also include: Constructing an emitter-follower conversion module, wherein the emitter-follower conversion module comprises a first emitter-follower conversion circuit and a second emitter-follower conversion circuit; connecting the input end of the first emitter-follower conversion circuit and the output end of the starting frequency compensation circuit, and the output end of the first emitter-follower conversion circuit and the input end of the adder; An input end of the second radio-follower conversion circuit is connected to an output end of the frequency modulation bandwidth compensation circuit, and an output end of the second radio-follower conversion circuit is connected to an input end of the adder.

8. A temperature compensation system for a broadband frequency modulation circuit as claimed in claim 1, characterized in that: The thermistor is a thermistor with a negative temperature coefficient.

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