For hardware design, RCfilter, voltage sensitive resistor and photoelectric isolation method are used to eliminate interference signal in sampling channel and A/D channel.
在硬件方面，采用RC滤波器、压敏电阻、光电隔离等措施，消除了采样通道及A/D通道的干扰信号；
2
A new restraining network method for analysing the network with operational amplifier is investigated in detail, taking RC active filter as a sample.
In this paper, a novel high precision CMOS bandgap voltage reference which USES a negative back circuit and a rcfilter to enhance the PSRR is proposed.