The toroidal core was excited by sharp pulse current. The sensor circuit is composed of peak value detector, Butterworth low-pass filter and differential amplifier.
磁芯采用高频脉冲电流励磁，信号处理电路由峰值检波、低通滤波及差动电路构成。
2
Peakdetectorcircuit is a fast adaptive detector circuit, and the limiting amplifier involves two stage differential amplifiers.
峰值检波采用自适应检波电路，限幅放大器采用两级差分放大器构成。
3
The principle of sub-threshold MOS peakdetector is stated and the circuit is implemented.