电容积分弱电流测量I/F变换电路

Capacitance Integration Weak Current Measurement I/F Conversion Circuit

采用电容积分的方法设计了一种测量弱电流的电路.该电路将被测量的微弱电流转变成可被处理机接受和处理的脉冲信号.试验测试结果表明:电容积分法与电阻反馈法相比,电容积分法克服了高值电阻带来的限制,提高了抗干扰性能和灵敏度.

A circuit for measuring weak current is designed by the method of capacitance integration.This circuit converts the measured weak current into a pulse signal that can be accepted and processed by the processor.The experimental test results show that compared with resistance feedback method,capacitance integration method overcomes the limitation brought by high-value resistance,improved anti-interference performance and sensitivity.