摘要
地震仪的前置放大器通常为测量放大器 ,WILSON镜象电流源的电流I与I′有良好的匹配性 ,若将该电流源接在前置放大电路中 ,对于提高前置放大器共模抑制能力 ,有效采集微弱地震信号是极为有利的。
The preamplifier of the seismic instrument is usually measurement amplifier.The current of WILSON image current source between I and I′(show as figure one) matches well.When WILSON image current source is connected to the preamplification circuit,the circuit will provide strong common mode rejection capacibility to the preamplifier and convenient to acquisite slight seismic signal effectively.
出处
《石油仪器》
1998年第1期16-17,54,共2页
Petroleum Instruments
关键词
前置放大器
镜象电流源
地震仪
地震勘探
telemetring seismometer,preamplifier,image,current source,assumption
