CN-122001305-A - Current transconductance amplification system and method based on alternating current quantum voltage reference

CN122001305ACN 122001305 ACN122001305 ACN 122001305ACN-122001305-A

Abstract

The application provides a current transconductance amplifying system and method based on an alternating current quantum voltage reference, comprising an alternating current quantum voltage signal source, a transconductance amplifying circuit, a sampling resistor module, a dynamic feedback network, a comparison controller and a comparison controller, wherein the alternating current quantum voltage signal source is used for generating an alternating current quantum voltage signal, the transconductance amplifying circuit is used for converting the alternating current quantum voltage signal into a current signal based on a preset transconductance value, the sampling resistor module is used for converting the current signal into a sampling voltage signal based on a preset feedback impedance parameter, the dynamic feedback network is used for conditioning the sampling voltage signal based on a preset feedback network parameter and outputting a feedback voltage signal, and the comparison controller is used for calculating an error value based on the alternating current quantum voltage signal and the feedback voltage signal and generating a signal for adjusting the transconductance value in the transconductance amplifying circuit and the feedback network parameter in the dynamic feedback network based on the error value.

Inventors

XU XITONG
JIANG YIQIN
ZHU LIN
ZHANG LI
SONG XIAOHUI
GENG AILING
GE YANAN
ZHANG ZHENGMING
XU TONG
ZHAO LONG
GENG JIAQI
DUAN XIAOMENG
BAI JINGFEN
MENG JING
YANG YUBO
LI ZONGRONG
JIA FUQUAN
DUAN YONGXIAN
CEN WEI

Assignees

中国电力科学研究院有限公司
国网安徽省电力有限公司电力科学研究院

Dates

Publication Date: 20260508
Application Date: 20251225

Claims (10)

1. A current transconductance amplifying system based on an ac quantum voltage reference, comprising: the alternating-current quantum voltage signal source is used for generating an alternating-current quantum voltage signal based on a preset pulse driving type Josephson junction array; the transconductance amplifying circuit is used for receiving the alternating current quantum voltage signal and converting the alternating current quantum voltage signal into a current signal based on a preset transconductance value; the sampling resistor module is used for receiving the current signal and converting the current signal into a sampling voltage signal based on a preset feedback impedance parameter; the dynamic feedback network is used for receiving the sampling voltage signals, conditioning the sampling voltage signals based on preset feedback network parameters and outputting feedback voltage signals; And the comparison controller is used for receiving the alternating current quantum voltage signal and the feedback voltage signal, calculating an error value based on the alternating current quantum voltage signal and the feedback voltage signal, and generating a control signal for adjusting the transconductance value in the transconductance amplifying circuit and a configuration signal for adjusting the feedback network parameters in the dynamic feedback network based on the error value.
2. The ac quantum voltage reference-based current transconductance amplification system of claim 1, further comprising an anomaly detection and fault tolerance module; The alternating current quantum voltage signal source comprises a quantum lock-out detection unit and is used for judging that the alternating current quantum voltage signal source is out of lock when the fluctuation of the output alternating current quantum voltage signal continuously exceeds a set threshold value, and generating and outputting a low-level lock state signal; the sampling resistor module comprises a load impedance detection unit, is used for monitoring the voltage at two ends of the sampling resistor module and the current of the sampling resistor module, calculates the change rate of the load impedance according to the voltage at two ends of the sampling resistor module and the current of the sampling resistor module by adopting ohm's law, and generates and outputs a load state signal when the change rate of the load impedance exceeds a set threshold value; The comparison controller comprises an analog-to-digital converter and is used for synchronously collecting the alternating current quantum voltage signal and the feedback voltage signal, and when the analog-to-digital converter overflows data or the continuous multiple error value exceeds a set threshold value, an analog-to-digital conversion state signal is generated and output; The abnormality detection and fault tolerance module is configured to receive the locking state signal, the load state signal, and the analog-to-digital conversion state signal, determine a system abnormal condition based on the locking state signal, the load state signal, and the analog-to-digital conversion state signal, and output a corresponding fault tolerance instruction to the comparison controller, where the fault tolerance instruction includes an emergency parameter corresponding to the system abnormal condition.
3. The ac quantum voltage reference-based current transconductance amplifier system of claim 2, wherein the sampling resistor module further comprises a precision resistor and an analog switch, together for providing a selectable sampling resistance to adjust the feedback impedance parameter.
4. The ac quantum voltage reference-based current transconductance amplification system of claim 1, wherein the dynamic feedback network comprises a programmable resistor array, a programmable capacitor array, and an operational amplifier; One end of the programmable resistor array and one end of the programmable capacitor array are connected in parallel and then are connected with the inverting input end of the operational amplifier and the input end of the dynamic feedback network, and the other end of the programmable resistor array and one end of the programmable capacitor array are connected with the output end of the operational amplifier and the output end of the dynamic feedback network; The programmable resistor array and the programmable capacitor array are respectively provided with a control end for receiving a configuration signal from the comparison controller so as to dynamically adjust a feedback network parameter, wherein the feedback network parameter is the resistance value of the programmable resistor array and the capacitance value of the programmable capacitor array; the operational amplifier, the programmable resistor array and the programmable capacitor array together form an inverting amplifier, and the inverting amplifier is used for conditioning the amplitude and the phase of the input sampling voltage signal based on the configuration signal and outputting a conditioned feedback voltage signal.
5. The ac quantum voltage reference-based current transconductance amplification system of claim 2, wherein the comparison controller further comprises an FPGA and a temperature sensor; the temperature sensor is used for collecting system environment temperature data in real time; The FPGA is used for receiving the environmental temperature data, the alternating current quantum voltage signal and the feedback voltage signal, and is integrated with a preset mode and a self-adaptive mode, calculates an error value based on the alternating current quantum voltage signal and the feedback voltage signal, and generates a control signal for adjusting the transconductance value in the transconductance amplifying circuit and a configuration signal for adjusting the feedback network parameter in the dynamic feedback network based on the error value and a selected working mode, wherein the selected working mode is selected from the preset mode and the self-adaptive mode.
6. The ac quantum voltage reference-based current transconductance amplification system of claim 1, further comprising a long-term calibration storage module comprising: The nonvolatile memory is used for storing preset parameters of the transconductance amplifying circuit, the sampling resistor module and the dynamic feedback network of the system; and the calibration triggering unit is used for receiving the error value calculated by the comparison controller in real time, calculating a daily error accumulated value and sending a calibration instruction to an upper computer of the current transconductance amplifying system when the daily error accumulated value exceeds a preset threshold value.
7. The ac quantum voltage reference-based current transconductance amplification system of claim 1, wherein the clock module is an atomic clock.
8. A current transconductance amplification method based on an ac quantum voltage reference, applied to the current transconductance amplification system based on the ac quantum voltage reference according to any one of claims 1 to 7, characterized in that the method comprises: Presetting initial parameters of each module in the current transconductance amplification system based on the alternating current quantum voltage reference standard, initializing parameters of the current transconductance amplification system based on the alternating current quantum voltage reference standard, wherein each module comprises an alternating current quantum voltage signal source, a transconductance amplification circuit, a sampling resistor module, a dynamic feedback network and a comparison controller; The ac quantum voltage signal source generates an ac quantum voltage signal, The transconductance amplifying circuit converts the alternating current quantum voltage signal into a current signal based on a preset transconductance value; the sampling resistor module converts the current signal into a sampling voltage signal based on a preset feedback impedance parameter; The dynamic feedback network conditions the sampling voltage signal based on preset feedback network parameters to generate a feedback voltage signal; the comparison controller calculates an error value based on the alternating current quantum voltage signal and the feedback voltage signal, and generates a control signal for adjusting a transconductance value in the transconductance amplifying circuit and a configuration signal for adjusting a feedback network parameter in the dynamic feedback network based on the error value.
9. The method of current transconductance amplification based on an ac quantum voltage reference of claim 8, further comprising: During the operation of the system, the abnormality detection and fault tolerance module judges the abnormal working condition of the system based on various received state signals and outputs corresponding fault tolerance instructions to the comparison controller, wherein the fault tolerance instructions comprise emergency parameters corresponding to the abnormal working condition of the system, and the various state signals are output by the alternating current quantum voltage signal source, the sampling resistor module and the comparison controller; correspondingly, the comparison controller pauses the current operation based on the fault-tolerant instruction and calls an emergency parameter in the fault-tolerant instruction to adjust the system.
10. The method of current transconductance amplification based on an ac quantum voltage reference of claim 8, further comprising: The comparison controller is integrated with a preset mode and an adaptive mode; in a preset mode, the comparison controller directly calls an optimal parameter combination pre-stored in a long-term calibration storage module based on the error value to generate a control signal for adjusting the transconductance value in the transconductance amplifying circuit and a configuration signal for adjusting the feedback network parameters in the dynamic feedback network; And in the self-adaptive mode, the comparison controller dynamically adjusts the transconductance value in the transconductance amplifying circuit and the feedback network parameter in the dynamic feedback network in real time through a parameter self-adaptive law based on the Lyapunov stability theory.

Description

Current transconductance amplification system and method based on alternating current quantum voltage reference Technical Field The application relates to the technical field of metering, in particular to a current transconductance amplifying system and method based on an alternating current quantum voltage reference standard. Background The high-precision current standard source is core basic equipment in the fields of metering calibration, power equipment detection, precision experiments and the like. At present, a closed-loop control architecture of an operational amplifier and a fixed parameter feedback network is commonly adopted as a main current high-end current source at home and abroad, and the working principle of the current high-end current source is that a reference signal is provided by an internal voltage reference, voltage-current (V-I) conversion is realized after the current high-end current source is amplified by the operational amplifier, and then the output stability is regulated by a feedback network consisting of a fixed resistor/capacitor. The structure has the inherent defects that (1) the accuracy of a voltage reference is limited, the traditional band gap reference cannot trace to a basic physical constant, the accuracy limits the final accuracy of current output, (2) the broadband stability contradiction is prominent, the turning frequency of a fixed feedback network is fixed, the output accuracy is deteriorated due to insufficient feedback depth in a low frequency band, oscillation is easy to occur due to insufficient phase margin in a high frequency band, a broadband application scene from power frequency to high frequency cannot be covered, and (3) the nonlinear drift is uncontrollable, the temperature drift and time drift of an analog device can cause the change of transconductance gain along with the environment, and the traditional static calibration method cannot compensate the drift under a dynamic working condition, so that the long-term stability is poor. Therefore, based on the above-mentioned problems, the present application provides a current transconductance amplifying system and method based on an ac quantum voltage reference. Disclosure of Invention The embodiment of the application provides a current transconductance amplifying system and a method based on an alternating current quantum voltage reference standard, which remarkably improve the precision, bandwidth and stability of current output through the full-link design of quantum reference, dynamic feedback, self-adaptive control, abnormal fault tolerance and long-term calibration. In order to achieve the above purpose, the application adopts the following technical scheme: The application provides a current transconductance amplifying system based on an alternating-current quantum voltage reference standard, which comprises an alternating-current quantum voltage signal source, a first current quantum voltage signal source, a second current quantum voltage signal source and a second current quantum voltage signal source, wherein the alternating-current quantum voltage signal source is used for generating an alternating-current quantum voltage signal based on a preset pulse driving type Josephson junction array; The transconductance amplifying circuit is used for receiving the alternating current quantum voltage signal and converting the alternating current quantum voltage signal into a current signal based on a preset transconductance value; The sampling resistor module is used for receiving the current signal and converting the current signal into a sampling voltage signal based on a preset feedback impedance parameter; The dynamic feedback network is used for receiving the sampling voltage signal, conditioning the sampling voltage signal based on preset feedback network parameters and outputting a feedback voltage signal; and the comparison controller is used for receiving the alternating current quantum voltage signal and the feedback voltage signal, calculating an error value based on the alternating current quantum voltage signal and the feedback voltage signal, and generating a control signal for adjusting the transconductance value in the transconductance amplifying circuit and a configuration signal for adjusting the feedback network parameters in the dynamic feedback network based on the error value. The application provides a current transconductance amplification method based on an alternating current quantum voltage reference standard, which comprises the steps of presetting initial parameters of all modules in a current transconductance amplification system based on the alternating current quantum voltage reference standard, and initializing parameters of the current transconductance amplification system based on the alternating current quantum voltage reference standard; The ac quantum voltage signal source generates an ac quantum voltage signal, The transconductance amplifying circuit converts