Application of High Resistance Operational Amplifier CA3140A in Signal Conditioning Circuit of Gamma Logging Tool

Abstract

Abstract The current type signal of gamma detector in gamma logging tool is generally weak, which can not be directly input into microcontroller for pulse counting and statistical analysis. The signal conditioning circuit is designed by using high performance, low noise, small volume single operational amplifier CA3140A, which processes the weak signal from gamma detector, and realizes the corresponding hardware circuit according to the actual application requirements. The experimental results show that: the circuit design performance is stable, and can effectively pick up and process the effective pulse signal, which meets the expected design requirements.