A high-precision adaptive clock signal anti-jitter system

Abstract

The application discloses a high-precision adaptive clock signal anti-jump system, comprising a clock signal acquisition module, a multi-dimensional signal preprocessing module, an adaptive jump identification module, a dynamic compensation module, a redundancy backup module, a signal selection output module and a system control module. The sampling frequency of the clock signal acquisition module is 816 times of the clock signal frequency, integrated temperature and voltage sensors, temperature acquisition accuracy is less than or equal to ±0.5 DEG C, voltage acquisition accuracy is less than or equal to ±0.01 V, and 50Ω or 75Ω impedance matching and electromagnetic shielding structure are adopted. The system realizes high-precision suppression of clock signal jump through adaptive threshold judgment, real-time dynamic compensation and seamless switching of redundant clock, improves clock stability and system reliability, and is suitable for high-precision scenes such as communication, aerospace and industrial control.

Description

Technical Field

[0001] This invention relates to the field of clock signal processing technology, and in particular to a high-precision adaptive clock signal anti-jump system. Background Technology

[0002] Existing clock anti-jump technologies mainly employ fixed threshold filtering, hardware redundancy backup, or simple feedback adjustment methods, which have significant limitations: First, fixed threshold filtering cannot adapt to clock signal changes in different scenarios. If the threshold is set too wide, it cannot effectively suppress slight jumps. If the threshold is set too strict, it is easy to misjudge normal clock fluctuations, resulting in signal distortion. It is difficult to balance the anti-jump effect and signal integrity. Secondly, hardware redundancy backup is costly and complex, and is prone to additional clock jitter during the switching process, making it impossible to achieve a seamless transition and difficult to meet the needs of high-precision scenarios. Third, traditional feedback regulation has a slow response speed and low regulation accuracy. It cannot track the dynamic changes of the clock signal in real time, has limited effect on suppressing sudden jumps, and cannot compensate for the delay uncertainty caused by PVTA changes, making it difficult to adapt to complex and ever-changing working environments.

[0003] Furthermore, most existing technologies only suppress single types of transition triggers and lack systematic solutions. They cannot simultaneously address the combined effects of external interference, changes in internal circuit characteristics, and sudden load changes, making it difficult to guarantee the long-term stability and high precision of clock signals. This severely restricts the performance improvement of high-end electronic systems. Therefore, developing a technology that can adaptively track the state of clock signals and accurately identify and suppress various transitions has become an urgent technical problem to be solved in this field. Summary of the Invention

[0004] The main objective of this invention is to provide a high-precision adaptive clock signal anti-jump system, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A high-precision adaptive clock signal anti-jump system includes a clock signal acquisition module, a multi-dimensional signal preprocessing module, an adaptive jump identification module, a dynamic compensation module, a redundancy backup module, a signal selection output module, and a system control module. Each module is electrically connected in sequence to form a closed-loop feedback control. The clock signal acquisition module is used to acquire the main clock signal, the backup clock signal, and temperature and power supply voltage data of the clock source's operating environment. It employs a high-precision differential sampling circuit and shielded isolation design to reduce acquisition errors. The multi-dimensional signal preprocessing module filters, shapes, and extracts features from the acquired raw clock signal to obtain core feature parameters such as frequency, phase, and duty cycle. These parameters are then combined with temperature and voltage data to form a multi-dimensional feature set. The adaptive jump recognition module uses a benchmark threshold adaptive update + multi-feature fusion judgment method to identify clock signal jumps in real time, outputting jump recognition signals and jump information, while dynamically updating the benchmark threshold. The state compensation module is used to calculate the compensation amount in real time and dynamically compensate the clock signal that has jumped when a jump is detected, based on temperature and voltage data, and through an adaptive compensation algorithm, so that the clock signal returns to stability. The redundancy backup module is used to provide a high-precision backup clock signal, realize the synchronization of the main and backup clock signals, monitor the working status of the main and backup clock sources, and output fault signals. The signal selection output module is used to select the output of the compensated main clock signal or the backup clock signal according to the instructions of the system control module, so as to ensure that the signal is continuous and jitter-free. The system control module is used to receive feedback signals from each module, issue control commands, coordinate the collaborative work of each module, and realize parameter configuration, status monitoring and data storage.

[0006] Preferably, the sampling frequency of the clock signal acquisition module is 8-16 times the clock signal frequency, and it integrates a digital temperature sensor and a voltage sensor. The temperature acquisition accuracy is ≤±0.5℃, and the voltage acquisition accuracy is ≤±0.01V. The sampling circuit adopts a 50Ω or 75Ω impedance matching design and is equipped with a shield for electromagnetic isolation.

[0007] Preferably, the multi-dimensional signal preprocessing module includes a low-noise filtering unit, a signal shaping unit, and a feature extraction unit; the low-noise filtering unit adopts an adaptive infinite impulse response (IIR) filter circuit, the signal shaping unit adopts a high-speed comparator, and the feature extraction unit extracts features with a frequency accuracy ≤1ppm, a phase accuracy ≤0.1°, and a duty cycle accuracy ≤0.1%.

[0008] Preferably, the adaptive jump recognition module includes a reference threshold generation unit, a jump judgment unit, and a threshold update unit; the reference threshold generation unit generates an initial reference threshold through a machine learning algorithm, including a frequency deviation threshold, a phase offset threshold, and a duty cycle deviation threshold; the jump judgment unit compares the current feature parameters with the reference threshold, and determines a jump when any parameter exceeds the threshold for a duration of 0.1-1μs; the threshold update unit updates the reference threshold every 10-100ms, dynamically adjusting it in conjunction with temperature and voltage fluctuations.

[0009] Preferably, the dynamic compensation module includes a compensation algorithm unit and a compensation execution unit; the compensation algorithm unit adopts a PID adaptive compensation algorithm to calculate the compensation amount of frequency, phase, and duty cycle; the compensation execution unit adopts a high-precision digital-to-analog converter (DAC) circuit and a phase adjuster, with a compensation response time ≤0.5μs and a compensation accuracy ≤0.01ppm, and also has temperature and voltage compensation functions.

[0010] Preferably, the backup clock source of the redundant backup module adopts a temperature-controlled crystal oscillator (OCXO), and the temperature is stabilized at a constant temperature point through a temperature control circuit, with a temperature-induced PPM deviation of ≤ ±0.001; the clock synchronization unit adopts an optimized phase-locked loop (PLL), with a primary and backup clock synchronization accuracy of ≤ 0.1 ns; the status monitoring unit monitors the output amplitude and frequency stability of the primary and backup clock sources and outputs fault signals in a timely manner.

[0011] Preferably, the signal selection output module includes a high-speed analog switch and a signal buffer unit; the high-speed analog switch has a response speed of ≤0.1μs and the switching process is free of glitches and jitter; the signal buffer unit adopts a low-noise buffer amplifier with output impedance matching to ensure stable signal amplitude and complete waveform.

[0012] Preferably, the system control module adopts a high-performance microcontroller (MCU), which communicates with the host computer through SPI or I2C interface to realize parameter configuration, status monitoring and data reading. The built-in storage unit stores jump records and compensation data, which facilitates later fault diagnosis.

[0013] Preferably, the system's workflow includes: signal acquisition, signal preprocessing, transition recognition, dynamic compensation, and signal selection output, forming a closed-loop feedback to ensure stable clock signal output.

[0014] Compared with the prior art, the present invention has the following beneficial effects: In this invention, a baseline threshold adaptive update mechanism is adopted. Combined with environmental parameters such as temperature and voltage, the jump detection threshold and compensation parameters are adjusted in real time. It can automatically adapt to the effects of environmental changes, device aging and load changes without manual intervention. It can be widely used in electronic systems with different accuracy requirements and different working environments. It solves the problem of poor adaptability of traditional fixed threshold anti-jump technology. At the same time, it can effectively cope with the delay uncertainty caused by PVTA changes and improve system stability.

[0015] In this invention, through multi-dimensional signal preprocessing (filtering, shaping, and feature extraction) and multi-feature fusion transition recognition, it can accurately identify nanosecond-level slight transitions, avoiding misjudgments and missed judgments. The PID adaptive dynamic compensation algorithm achieves a compensation accuracy of 0.01ppm and a response time of ≤0.5μs, which can quickly suppress transitions while ensuring the frequency and phase accuracy of the clock signal and avoiding the introduction of additional jitter during the compensation process. This solves the problems of low transition prevention accuracy and signal distortion in existing technologies and meets the high-precision requirements of high-end systems.

[0016] In this invention, a high-precision constant-temperature backup clock source and synchronous phase-locked loop design are adopted. The synchronization accuracy of the main and backup clocks is ≤0.1ns, and the switching response speed is ≤0.1μs. This enables seamless switching when the jump cannot be compensated or the main clock fails, avoiding clock signal interruption and ensuring continuous and stable operation of the system. At the same time, through power supply filtering, electromagnetic shielding and other designs, the anti-interference capability of the system is further improved and the causes of jump are reduced.

[0017] Compared with traditional hardware redundancy backup schemes, this invention simplifies the system structure, reduces the use of hardware components, and lowers system costs while ensuring high precision and high reliability through closed-loop feedback control and adaptive algorithms. It also features configurable parameters and monitorable status, making it easy to maintain and optimize in the future, and has high engineering application value.

[0018] In this invention, a closed-loop design with multiple modules working in tandem is adopted, which can simultaneously cope with various jump causes such as external electromagnetic interference, power ripple, temperature fluctuation, internal component aging, frequency drift, and load changes, forming a comprehensive jump suppression system. This solves the limitation of existing technologies that can only suppress a single type of jump and improves the long-term stability of clock signals. Attached Figure Description

[0019] Figure 1 This is a block diagram of the overall structure of a high-precision adaptive clock signal anti-jump system according to the present invention; Figure 2 This is a structural block diagram of the multi-dimensional signal preprocessing module of a high-precision adaptive clock signal anti-jump system of the present invention; Figure 3 This is a structural block diagram of the adaptive transition recognition module of a high-precision adaptive clock signal anti-transition system according to the present invention; Figure 4 This is a flowchart illustrating the operation of a high-precision adaptive clock signal anti-jump system according to the present invention.

[0020] In the diagram: 1. Clock signal acquisition module; 2. Multi-dimensional signal preprocessing module; 21. Low noise filtering unit; 22. Signal shaping unit; 23. Feature extraction unit; 3. Adaptive transition recognition module; 31. Baseline threshold generation unit; 32. Transition judgment unit; 33. Threshold update unit; 4. Dynamic compensation module; 5. Redundancy backup module; 6. Signal selection output module; 7. System control module. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] Example 1: like Figure 1-4 As shown, this embodiment provides a high-precision adaptive clock signal anti-jump system, suitable for 5G communication base stations. The clock signal frequency is 156.25MHz, requiring clock signal jump suppression accuracy ≤0.1ns and output clock accuracy ≤0.01ppm. The specific structure is as follows: The clock signal acquisition module uses the AD9240 high-speed differential sampling chip, with a sampling frequency of 1.25GHz (8 times the clock signal frequency) and a sampling resolution of 14 bits. It acquires the main clock signal (OCXO temperature-compensated crystal oscillator, frequency 156.25MHz, accuracy 0.001ppm) and the backup clock signal (TCXO temperature-compensated crystal oscillator, frequency 156.25MHz, accuracy 0.01ppm). It integrates a DS18B20 digital temperature sensor with a sampling range of -40℃ to 85℃ and an accuracy of ±0.5℃; and an ADS1115 voltage sensor with a sampling range of 0 to 5V and an accuracy of ±0.01V. The sampling circuit adopts a 50Ω impedance matching design, adds grounding vias at the vias to reduce impedance abrupt changes, uses a 45° transition for the clock line, and sets up a metal shield for electromagnetic isolation to reduce external electromagnetic interference and transmission reflection errors.

[0023] The low-noise filtering unit in the multi-dimensional signal preprocessing module uses an AD8421 instrumentation amplifier and an infinite impulse response (IIR) filter circuit with a cutoff frequency set to 500MHz to filter out high-frequency electromagnetic interference and power supply ripple. The signal shaping unit uses an AD8561 high-speed comparator with a response speed of ≤10ns to correct the clock signal duty cycle to 50%±1% and ensure edge steepness. The feature extraction unit is implemented using an FPGA (EP4CE10F17C8) to extract the frequency (accuracy 0.001ppm), phase (accuracy 0.05°), and duty cycle (accuracy 0.1%) characteristic parameters of the clock signal. At the same time, temperature and voltage data are collected to form a multi-dimensional feature set, which is then transmitted to the adaptive transition recognition module.

[0024] The adaptive jump detection module uses an STM32H743 microcontroller to generate initial reference thresholds using the least squares method: frequency deviation threshold ±0.01ppm, phase offset threshold ±0.1°, and duty cycle deviation threshold ±0.5%. The jump detection unit compares the current feature parameters with the reference thresholds in real time. When any parameter exceeds the threshold and the duration is ≥0.2μs, it is determined to be a jump and a jump detection signal is output. The threshold update unit updates the reference threshold every 50ms and dynamically adjusts the threshold based on temperature and voltage fluctuations to avoid false positives and false negatives. At the same time, it adjusts the threshold sensitivity according to PVTA changes.

[0025] The dynamic compensation module's compensation algorithm unit employs a PID adaptive compensation algorithm, implemented by an STM32H743 microcontroller. Based on the transition type and amplitude, combined with temperature and voltage data, it calculates the compensation amount in real time. The compensation execution unit uses an AD5683 digital-to-analog converter (DAC) chip (16-bit resolution, setup time ≤1μs) and an AD8346 phase adjuster to accurately compensate for the frequency and phase of the clock signal, achieving a compensation response time ≤0.3μs and a compensation accuracy of 0.005ppm. For temperature changes, the load capacitance of the OCXO crystal oscillator is adjusted to offset temperature drift. For voltage fluctuations, the charging and discharging current of the oscillation circuit is adjusted via feedback to maintain frequency stability.

[0026] The backup clock source in the redundant backup module uses an OCXO temperature-controlled crystal oscillator, and the temperature is stabilized at 85℃ through a PID temperature control circuit, with the temperature-induced PPM deviation controlled within ±0.001. The clock synchronization unit uses an ADF4159 phase-locked loop (PLL) chip to achieve phase synchronization of the main and backup clock signals, with a synchronization accuracy of ≤0.05ns. The status monitoring unit monitors the output amplitude (threshold 0.5~3V) and frequency stability of the main and backup clock sources in real time. When the output amplitude of the main clock source exceeds the threshold or the jump amplitude is ≥0.1ppm and cannot be compensated, a fault signal is output.

[0027] The high-speed analog switch of the signal selection output module uses the ADG1419 chip, with a response speed of ≤50ns and no glitches or jitter during the switching process; the signal buffer unit uses the AD8001 high-speed buffer amplifier with a bandwidth of ≥1GHz and an output impedance of 50Ω to amplify the clock signal and ensure that the output signal amplitude is stable at 1.8V±0.1V with a complete waveform, meeting the clock requirements of various modules of the 5G base station.

[0028] The system control module uses an STM32H743 microcontroller to receive feedback signals from each module and coordinate their collaborative work. It communicates with the host computer via the SPI interface to configure parameters (thresholds, compensation coefficients, switching times, etc.), monitor status, and read data. It has a built-in Flash memory chip to store clock signal characteristic parameters, transition records, and compensation data, which facilitates troubleshooting and system optimization in the future.

[0029] In this embodiment, the clock signal acquisition module acquires a 156.25MHz main clock signal, a backup clock signal, and temperature and voltage data in real time. The multi-dimensional signal preprocessing module filters, shapes, and extracts features from the acquired signals to obtain frequency, phase, duty cycle, and environmental parameters. The adaptive jump identification module compares the feature parameters with the adaptively updated benchmark threshold in real time. When a jump is detected (e.g., a frequency deviation of 0.02ppm lasting 0.3μs), a jump identification signal is output. The dynamic compensation module immediately starts PID adaptive compensation, calculates the compensation amount, and applies it to the main clock source to correct the frequency deviation to 0.003ppm, so that the clock signal returns to stability. If the main clock source fails (e.g., no output), the redundant backup module outputs a fault signal, and the system control module controls the output module to switch to the backup clock signal. The switching time is ≤0.1μs, ensuring continuous and stable output of the 5G base station clock signal, with a jump suppression accuracy of 0.08ns and an output clock accuracy of 0.005ppm, meeting the stringent requirements of 5G communication base stations.

[0030] Example 2: like Figure 1-4 As shown, this embodiment provides a high-precision adaptive clock signal anti-jump system, suitable for aerospace navigation equipment. The clock signal frequency is 100MHz, requiring clock signal jump suppression accuracy ≤0.05ns and output clock accuracy ≤0.005ppm. The specific structure is basically the same as that of Embodiment 1, with the difference being: The clock signal acquisition module uses the AD9680 high-speed differential sampling chip with a sampling frequency of 1.6GHz (16 times the clock signal frequency) and a sampling resolution of 16 bits; the temperature sensor uses an improved version of the DS18B20 with an acquisition accuracy of ±0.1℃; the voltage sensor uses the ADS1256 with an acquisition accuracy of ±0.001V; the sampling circuit adopts a 75Ω impedance matching design, adds a double shield, enhances electromagnetic interference suppression capability, and adapts to the complex electromagnetic environment of aerospace.

[0031] The low-noise filtering unit of the multi-dimensional signal preprocessing module adopts a two-stage IIR filter circuit with a cutoff frequency set to 300MHz to further filter out spatial electromagnetic interference; the feature extraction unit adopts FPGA (EP4CE15F23C8), with a frequency extraction accuracy of 0.0005ppm and a phase extraction accuracy of 0.01°.

[0032] The transition judgment duration of the adaptive transition recognition module is set to 0.1μs, and the threshold update period is set to 10ms, which improves the response speed and accuracy of transition recognition.

[0033] The DAC chip in the dynamic compensation module is the AD5791 (20-bit resolution, setup time ≤500ns), with a compensation response time ≤0.2μs and a compensation accuracy of 0.001ppm. It adopts a dual mechanism of constant temperature control and temperature compensation to further improve the stability of the clock signal.

[0034] The redundant backup module uses dual backup clock sources, both of which are OCXO temperature-controlled crystal oscillators with a synchronization accuracy of ≤0.01ns, ensuring the continuity of the clock signal under extreme conditions; the status monitoring unit adds a vibration sensor to monitor the vibration of the equipment and adjust the threshold and compensation parameters in a timely manner to cope with mechanical vibration interference in the aerospace environment.

[0035] When the system in this embodiment is working, it can effectively suppress clock jumps caused by strong electromagnetic interference, drastic temperature fluctuations, mechanical vibrations and other factors in the aerospace environment. The jump suppression accuracy reaches 0.04ns and the output clock accuracy reaches 0.003ppm, ensuring the timing synchronization accuracy of the navigation equipment and guaranteeing the smooth completion of the navigation mission.

[0036] It should be noted that this invention is a high-precision adaptive clock signal anti-jump system, and the specific process during operation is as follows: S1, the clock signal acquisition module collects the main clock signal, the backup clock signal, and the temperature and voltage data of the clock source's working environment in real time, and transmits the collected signals and data to the multi-dimensional signal preprocessing module; S2, the multi-dimensional signal preprocessing module filters, shapes and extracts features from the acquired raw clock signal to obtain the frequency, phase and duty cycle feature parameters of the clock signal. Combined with temperature and voltage data, it forms a multi-dimensional feature set and transmits it to the adaptive jump recognition module. S3. The adaptive jump detection module identifies whether there is a jump in the clock signal in real time based on a multi-dimensional feature set, through adaptively updated benchmark thresholds and multi-feature fusion. If no jump is detected, the preprocessed master clock signal is transmitted to the signal selection output module, which then outputs it to the system load. If a jump is detected, the jump detection signal is output to the dynamic compensation module and the system control module. S4. The dynamic compensation module calculates the compensation amount based on the jump identification signal and temperature and voltage data through the PID adaptive compensation algorithm, performs real-time dynamic compensation on the jump master clock signal, and transmits the compensated clock signal to the signal selection output module. S5. The system control module monitors the dynamic compensation effect in real time. If the clock signal returns to stability after compensation, the control signal selection output module outputs the compensated main clock signal. If the clock signal still cannot be stabilized after compensation, or if the main clock source has a serious fault, the control signal selection output module switches to the backup clock signal to ensure continuous and stable clock signal output. S6, the adaptive jump identification module updates the baseline threshold in real time, the dynamic compensation module adjusts the compensation parameters according to environmental changes and signal status, and the redundant backup module continuously monitors the status of the main and backup clock sources to form a closed-loop feedback, ensuring long-term stable operation of the system and effectively suppressing various clock jumps.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision adaptive clock signal anti-jump system, characterized in that: It includes a clock signal acquisition module, a multi-dimensional signal preprocessing module, an adaptive jump recognition module, a dynamic compensation module, a redundancy backup module, a signal selection output module, and a system control module. Each module is electrically connected in sequence to form a closed-loop feedback control. The clock signal acquisition module is used to acquire the main clock signal, the backup clock signal, and temperature and power supply voltage data of the clock source's operating environment. It employs a high-precision differential sampling circuit and shielded isolation design to reduce acquisition errors. The multi-dimensional signal preprocessing module filters, shapes, and extracts features from the acquired raw clock signal to obtain core feature parameters such as frequency, phase, and duty cycle. These parameters are then combined with temperature and voltage data to form a multi-dimensional feature set. The adaptive jump detection module uses a benchmark threshold adaptive update + multi-feature fusion judgment method to identify clock signal jumps in real time, outputting jump detection signals and jump information, while dynamically updating the benchmark threshold. The dynamic compensation module, upon detecting a jump, calculates the compensation amount using an adaptive compensation algorithm based on temperature and voltage data, performing real-time dynamic compensation for the jump clock signal to restore its stability. The redundancy backup module provides a high-precision backup clock signal to achieve synchronization between the main and backup clock signals, monitors the operating status of the main and backup clock sources, and outputs fault signals. The signal selection output module selects to output either the compensated main clock signal or the backup clock signal according to system control module instructions, ensuring continuous signal without jitter. The system control module is used to receive feedback signals from each module, issue control commands, coordinate the collaborative work of each module, and realize parameter configuration, status monitoring, and data storage.

2. The high-precision adaptive clock signal anti-jump system according to claim 1, characterized in that: The clock signal acquisition module has a sampling frequency of 8-16 times the clock signal frequency. It integrates a digital temperature sensor and a voltage sensor, with a temperature acquisition accuracy of ≤±0.5℃ and a voltage acquisition accuracy of ≤±0.01V. The sampling circuit adopts a 50Ω or 75Ω impedance matching design and is equipped with a shield for electromagnetic isolation.

3. The high-precision adaptive clock signal anti-jump system according to claim 1, characterized in that: The multi-dimensional signal preprocessing module includes a low-noise filtering unit, a signal shaping unit, and a feature extraction unit; The low-noise filtering unit employs an adaptive infinite impulse response (IIR) filter circuit, the signal shaping unit employs a high-speed comparator, and the feature extraction unit extracts features with a frequency accuracy ≤1ppm, a phase accuracy ≤0.1°, and a duty cycle accuracy ≤0.1%.

4. The high-precision adaptive clock signal anti-jump system according to claim 1, characterized in that: The adaptive jump detection module includes a reference threshold generation unit, a jump judgment unit, and a threshold update unit. The reference threshold generation unit generates an initial reference threshold using a machine learning algorithm, including a frequency deviation threshold, a phase offset threshold, and a duty cycle deviation threshold. The jump judgment unit compares the current feature parameters with the reference thresholds, and determines a jump when any parameter exceeds the threshold for a duration of 0.1-1μs. The threshold update unit updates the reference threshold every 10-100ms, dynamically adjusting it in conjunction with temperature and voltage fluctuations.

5. A high-precision adaptive clock signal anti-jump system according to claim 1, characterized in that: The dynamic compensation module includes a compensation algorithm unit and a compensation execution unit. The compensation algorithm unit adopts a PID adaptive compensation algorithm to calculate the compensation amount of frequency, phase, and duty cycle. The compensation execution unit adopts a high-precision digital-to-analog converter (DAC) circuit and a phase adjuster, with a compensation response time ≤0.5μs and a compensation accuracy ≤0.01ppm. It also has temperature and voltage compensation functions.

6. The high-precision adaptive clock signal anti-jump system according to claim 1, characterized in that: The backup clock source of the redundant backup module adopts a temperature-controlled crystal oscillator (OCXO), and the temperature is stabilized at a constant temperature point through a temperature control circuit, with a temperature-induced PPM deviation of ≤ ±0.

001. The clock synchronization unit adopts an optimized phase-locked loop (PLL), with a primary and backup clock synchronization accuracy of ≤ 0.1 ns. The status monitoring unit monitors the output amplitude and frequency stability of the primary and backup clock sources and outputs fault signals in a timely manner.

7. A high-precision adaptive clock signal anti-jump system according to claim 1, characterized in that: The signal selection output module includes a high-speed analog switch and a signal buffer unit; the high-speed analog switch has a response speed of ≤0.1μs and the switching process is free of glitches and jitter; the signal buffer unit adopts a low-noise buffer amplifier with output impedance matching to ensure stable signal amplitude and complete waveform.

8. A high-precision adaptive clock signal anti-jump system according to claim 1, characterized in that: The system control module uses a high-performance microcontroller (MCU) to communicate with the host computer via SPI or I2C interface to realize parameter configuration, status monitoring and data reading. The built-in storage unit stores jump records and compensation data, which facilitates later fault diagnosis.

9. A high-precision adaptive clock signal anti-jump system according to any one of claims 1-8, characterized in that: The system's workflow includes: signal acquisition, signal preprocessing, transition recognition, dynamic compensation, and signal selection output, forming a closed-loop feedback to ensure stable clock signal output.

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