A temperature compensation system for broadband frequency modulation circuits

Abstract

The present invention discloses a temperature compensation system for a broadband frequency modulation circuit, which relates to the field of integrated circuit technology. The system includes: a temperature variation characteristic test module for testing the temperature variation characteristic of the tuning voltage of a voltage-controlled oscillator; a thermistor configuration module for selecting a thermistor compensation resistor based on the temperature variation characteristic of the tuning voltage; a comprehensive simulation calculation module for performing simulation tests based on the temperature variation characteristic of the tuning voltage and the thermistor compensation resistor to obtain a bias resistor set; a compensation configuration module for constructing a temperature compensation circuit based on the thermistor compensation resistor and bias resistor data sets; a voltage compensation and synthesis module for activating the temperature compensation circuit, performing temperature compensation for the starting frequency and the frequency modulation bandwidth, transmitting the compensation result to an adder, and obtaining a compensation voltage signal; and a compensation output module for transmitting the compensation voltage signal to the voltage-controlled oscillator for broadband frequency modulation. Thus, the technical effects of online monitoring, complete monitoring, and good early warning capabilities 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 variations can affect circuit performance, particularly the center frequency and frequency modulation bandwidth. Existing temperature compensation methods, such as temperature-compensated crystal oscillators, primarily compensate for output frequency. However, these methods operate in a fixed-frequency mode and cannot account for temperature variations in both the center frequency and frequency modulation bandwidth. This results in technical challenges 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 high compensation difficulty and low compensation accuracy in the prior art, thereby achieving the technical effects 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 based on the bias resistor data set of the thermistor compensation resistor, 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 for 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, comprising: 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 compensation resistor 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 compensation resistor, and obtaining 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 compensation resistor and 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 for 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 effect of improving compensation accuracy and reducing compensation difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic structural 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 principle diagram of a temperature compensation system for a broadband frequency modulation circuit.

[0010] Explanation of the accompanying symbols: temperature change 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 high compensation difficulty and low compensation accuracy in the prior art. The overall idea adopted is as follows:

[0012] First, the temperature variation characteristics testing module tests and obtains the temperature variation characteristics of the tuning voltage of the voltage-controlled oscillator. Then, the thermistor configuration module selects a thermistor compensation resistor based on the temperature variation characteristics of the tuning voltage. Then, the comprehensive simulation calculation module performs simulation testing based on the temperature variation characteristics of the tuning voltage and the thermistor compensation resistor to obtain a bias resistor set, where 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 based on the thermistor compensation resistor and the bias resistor data set, where 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 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 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, rather than all, are shown in the drawings.

[0014] Example 1

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

[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 the temperature variation characteristics of the tuning voltage of a voltage-controlled oscillator (VCO) is intended 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 for obtaining the temperature variation characteristics of the tuning voltage of a voltage controlled oscillator includes the following steps:

[0020] Extract the scene temperature domain based on the target working scenario of the voltage-controlled oscillator;

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

[0023] Specifically, the actual VCO operating scenario is determined. Based on the target operating scenario, the lowest and highest temperatures that may be encountered are defined to form a temperature domain. For example, some applications may require operation within a temperature range of -40°C to 85°C. The precision of temperature control is then determined based on the application's sensitivity to temperature changes. For example, measurements can be taken at 5°C intervals to obtain detailed temperature dependency data. Furthermore, combining the scenario temperature domain and compensation control granularity, a series of calibration temperature points is generated, such as [-40°C, -35°C, -30°C, ..., 80°C, 85°C].

[0024] Specifically, a variable temperature test is performed on a voltage-controlled oscillator. 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 spectrum analyzer for measuring the output frequency, and a temperature sensor for monitoring and recording 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. This forms a starting frequency tuning voltage sequence. 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. This forms an end frequency tuning voltage sequence. 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 ending frequency tuning voltage sequence, and the tuning voltage difference sequence at all calibration temperature points are summarized to obtain the tuning voltage temperature variation characteristics.

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

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

[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 the 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] Extracting the start frequency tuning voltage sequence from the tuning response data set using the start frequency of the voltage controlled oscillator as an index constraint, and extracting the end frequency tuning voltage sequence from the tuning response data set using the end frequency of the voltage controlled oscillator as an index constraint;

[0031] A tuning voltage difference sequence is calculated based on 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, and save the tuning response data at each temperature point to 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, within the tuning response dataset, the corresponding tuning voltage data is extracted using the VCO's starting frequency as an index to form a starting frequency tuning voltage sequence. This starting frequency tuning voltage sequence reflects the tuning voltage required to achieve a given starting frequency under different ambient temperatures. Similarly, the corresponding tuning voltage data is extracted using the VCO's end frequency as an index to form an end frequency tuning voltage sequence.

[0034] Specifically, the corresponding tuning voltage difference is calculated according to the starting frequency tuning voltage and the ending frequency tuning voltage at different temperature points, 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 characteristics of the VCO tuning voltage at different temperatures can be obtained, providing an essential reference for designing temperature compensation circuits, optimizing system performance, and predicting the operating status 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, the steps of selecting a thermistor compensation resistor according to the temperature variation characteristics of the tuning voltage include:

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

[0039] Calculating and obtaining a pressure difference fluctuation sequence according to the tuned voltage difference sequence, and determining a second thermistor based on the pressure difference fluctuation sequence;

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

[0041] Specifically, the tuning voltage variation corresponding to the starting frequency at different temperatures is analyzed to determine the trend and magnitude of the voltage variation with temperature. Based on this analysis, a thermistor with a corresponding temperature coefficient is selected to compensate for temperature-dependent voltage variations. The primary purpose of selecting the first thermistor is to stabilize the starting frequency, keeping it relatively stable despite temperature fluctuations.

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

[0043] By following these steps, you can select an appropriate thermistor resistor, RT, to help the voltage-controlled oscillator maintain a stable starting frequency and tuning range despite temperature fluctuations. The first thermistor is primarily used for temperature compensation of the starting frequency, while the second thermistor is used for tuning range compensation. Together, these two thermistors effectively minimize the impact of temperature on VCO performance.

[0044] In some embodiments, after selecting a thermistor compensation resistor according to the temperature variation characteristics of the tuning voltage, the steps further include:

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

[0046] Extracting a first thermal resistance value sequence and a second thermal resistance value sequence based on the thermal characteristic set;

[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 corresponding temperature-resistance characteristic curves, and the resistance values ​​of the second thermistor at different temperatures are measured and recorded to generate corresponding temperature-resistance characteristic curves.

[0049] Specifically, based on the temperature-resistance characteristic curve of the first thermistor, a resistance sequence at specific temperature points is extracted. This sequence reflects the effect of temperature changes on the resistance of the first thermistor. Based on the temperature-resistance characteristic curve of the second thermistor, a resistance sequence at specific temperature points is extracted. This sequence reflects the effect of temperature changes 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 a voltage-controlled oscillator (VCO) as the temperature changes. When the temperature drops, the VCO's output frequency increases. At this point, the resistance of the NTC thermistor increases, causing the bias voltage to decrease. This, in turn, reduces the tuning voltage, causing the VCO's output frequency to decrease, thereby compensating for the frequency increase caused by the low temperature and maintaining frequency stability. When the temperature rises, the VCO's output frequency decreases. At this point, the resistance of the NTC thermistor decreases, causing the bias voltage to increase. This increase in tuning voltage causes the VCO's output frequency to increase, thereby compensating for the frequency drop caused by the high temperature and maintaining frequency stability.

[0052] The comprehensive simulation calculation module 13 is used to perform simulation testing 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, to ensure the stability of the voltage-controlled oscillator (VCO) bias voltage at different temperatures and achieve effective frequency and bandwidth compensation, a suitable bias resistor set was selected through simulation testing. The bias resistor set includes a frequency compensation resistor set and a bandwidth compensation resistor set, each used to compensate for the voltage difference between the tuning voltage at the starting frequency and the frequency modulation bandwidth.

[0054] In some embodiments, as 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, a simulation test environment is constructed;

[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 temperature variation characteristic of the tuning voltage and the second thermistor resistance sequence, performing simulation calculations, 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 circuit models of the 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 characteristic curve, the temperature-resistance relationship of the first thermistor is extracted. The thermistor model in the simulation environment is initialized to have this characteristic. Next, the simulation is run, the resistance values ​​of R1, R2, and R3 are adjusted, and the frequency changes under different temperatures are observed. The frequency compensation effect corresponding to each resistance combination is recorded, and finally a frequency compensation resistor set is obtained.

[0060] Similarly, based on the tuning voltage difference sequence, extract the temperature-resistance relationship of the second thermistor and update the thermistor model in the simulation environment. Then, run the simulation, adjust the resistance values ​​of R1, R2, and R3, and observe the bandwidth changes at different temperatures. Record the bandwidth compensation effect for each resistance value combination to ultimately obtain a set of bandwidth-compensated resistors.

[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 within all operating temperature ranges and compensate for frequency and bandwidth drift caused by temperature changes.

[0062] The compensation configuration module 14 is configured to construct a temperature compensation circuit according to the bias resistor data set of the thermistor compensation resistor, 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 the starting tuning voltage and the tuning voltage difference of the 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, both including 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 on 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 temperature compensation results for the starting frequency and FM bandwidth are converted into voltage signals and transmitted to an adder. The adder combines the compensation voltage signals from different sources to generate a single, integrated compensation voltage signal. This compensation voltage signal can be used to adjust the frequency of the voltage-controlled oscillator to further optimize device performance.

[0068] For example, an adder includes four resistors and an op amp, including two input resistors and two output resistors, and all four resistors have the same resistance value. When the signal is combined through the two input resistors, the voltage is reduced to half of its original value. The two output resistors and the op amp then form a non-inverting amplifier circuit with a gain of 2, restoring the original voltage value. In other words, the total gain of the entire adder circuit is designed to be 1, and the input voltage signal is transmitted to the output at its 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 includes a first emitter-follower conversion circuit and a second emitter-follower conversion circuit;

[0071] connecting the input end of the first radio-follower conversion circuit and the output end of the starting frequency compensation circuit, and the output end of the first radio-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, because the compensation voltages output by the starting frequency compensation circuit and the FM bandwidth compensation circuit are generated by a resistor divider circuit with high impedance, load changes can significantly affect the compensation voltage, leading to increased compensation errors. Therefore, an emitter-follower circuit composed of an operational amplifier is used to process the voltage, converting it into a low-impedance circuit. In other words, the emitter-follower circuit acts as a load for the resistor divider compensation circuit, minimizing its impact on the compensation circuit's output voltage.

[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 terminal of the voltage-controlled oscillator (VCO), adjusting the VCO frequency and thus frequency modulating the broadband. This method automatically adjusts the VCO frequency based on changes in ambient temperature to maintain device performance and stability, improving signal quality and reliability.

[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: tests the temperature variation characteristic of the tuning voltage of the voltage-controlled oscillator. Thermistor configuration module: selects a suitable thermistor compensation resistor based on the temperature variation characteristic of the tuning voltage. Comprehensive simulation calculation module: performs simulation tests based on the temperature variation characteristic of the tuning voltage and the thermistor compensation resistor to obtain a bias resistor set, including a frequency compensation resistor set and a bandwidth compensation resistor set. Compensation configuration module: constructs 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: activates the temperature compensation circuit, performs temperature compensation for the starting frequency and frequency modulation bandwidth, and obtains the compensation voltage signal through the adder. Compensation output module: transmits the compensation voltage signal to the voltage-controlled oscillator to realize broadband frequency modulation. This achieves 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 embodiments mentioned above. It should be understood that those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein with equivalents; and such modifications or replacements do not deviate from the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention and are all included in the scope of protection 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 includes: A temperature variation characteristic test module is used to test and obtain the temperature variation characteristic of the tuning voltage of the voltage controlled oscillator, including: Calculate and obtain a tuning voltage difference sequence based on the starting frequency tuning voltage sequence and the end frequency tuning voltage sequence; The thermistor configuration module is used to select a thermistor compensation resistor according to the temperature variation characteristics of the tuning voltage, and the execution steps include: determining a first thermistor according to the starting frequency tuning voltage sequence; Calculating and obtaining a pressure difference fluctuation sequence according to the tuned voltage difference sequence, and determining a second thermistor based on the pressure difference fluctuation sequence; Outputting the first thermistor and the second thermistor as the thermal compensation resistor; A comprehensive simulation calculation module, configured to perform simulation testing 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 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, configured to activate the temperature compensation circuit, perform temperature compensation on 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 according to claim 1, characterized in that: The test obtains the temperature variation characteristics of the tuning voltage of the voltage controlled oscillator. The execution steps include: Extract the scene temperature domain based on the target working scenario of the voltage-controlled oscillator; 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 tuning voltage temperature variation characteristics, wherein the tuning voltage temperature variation characteristics include the starting frequency tuning voltage sequence, the end frequency tuning voltage sequence, and the tuning voltage difference sequence.

3. A temperature compensation system for a broadband frequency modulation circuit according to claim 2, characterized in that: According to the calibration temperature sequence, a temperature variation 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, a variable temperature test environment is set; 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 the 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; The starting frequency tuning voltage sequence is extracted from the tuning response data set using the starting frequency of the voltage controlled oscillator as an index constraint, and the ending frequency tuning voltage sequence is extracted from the tuning response data set using the ending frequency of the voltage controlled oscillator as an index constraint.

4. A temperature compensation system for a broadband frequency modulation circuit according to claim 3, characterized in that: After selecting a thermistor compensation resistor according to the temperature variation characteristics of the tuning voltage, the steps further include: Obtaining temperature-resistance characteristic curves of the first thermistor and the second thermistor, and outputting the curves as a thermal characteristic set; Extracting a first thermal resistance value sequence and a second thermal resistance value sequence based on the thermal characteristic set; Establishing an association relationship between the first thermistor resistance sequence, the second thermistor resistance sequence, and the thermistor compensation resistor.

5. A temperature compensation system for a broadband frequency modulation circuit as claimed in claim 4, 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, a simulation test environment is constructed; 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 temperature variation characteristic of the tuning voltage and the second thermistor resistance sequence, performing simulation calculations, 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.

6. A temperature compensation system for a broadband frequency modulation circuit according to claim 5, 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 includes a first emitter-follower conversion circuit and a second emitter-follower conversion circuit; connecting the input end of the first radio-follower conversion circuit and the output end of the starting frequency compensation circuit, and the output end of the first radio-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.

7. The temperature compensation system for a broadband frequency modulation circuit according to claim 1, wherein: The thermistor is a thermistor with a negative temperature coefficient.

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