本设计主要由带阻滤波器电路、低频功率放大器（包括电压放大器和功率输出放大器）、精密整流电路、A/D转换电路、直流稳压电路、V/F转换电路、显示电路等组成。-The design mainly consists of a band stop filter circuit, low-frequency power amplifier (including the voltage amplifier and power amplifier output), precision rectifier circuit, A/D converter circuits, DC circuits, V/F converter circuit, display circuit and other components.