It proposes using a noninverting amplifier consisting of a high accuracy and lowdrift integrated operational amplifier OP. 07 as a buffer amplifier in the circuit.
提出用高精度低漂移集成运算放大器OP-07组成同相放大器，作为监测电路的缓冲放大器；
2
The signal of acidity electrode is detected by a differential amplifier circuit, which consists of operational amplifiers TLC2254 with high input impedance and lowdrift.