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。
Peak detector circuit 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。
The principle of sub-threshold MOS peak detector is stated and the circuit is implemented.
先介绍了亚阈值MOS管峰值检测器的工作原理，并进行了电路实现。
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