宽范围微弱电流对数放大电路设计与仿真
Industrial Control Computer(2013)
Abstract
介绍了对数放大器测量电流的方法,使用高阻抗的场效应晶体管作为反馈元件,设计了一种宽范围微弱电流的测量电路.选择具有极低输入偏置电流和失调电压的运放提高测量的精度;选择匹配的结型场效应管和热敏电阻实现温度补偿.仿真结果表明,该电路的测量范围为100pA~ 10mA,测量精度高.
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