光电模块中微弱电流测量电路的设计与测试  

Design and test of weak current measurement circuit in photoelectric module

作　　者：谭同 何慧敏[1,2,3] 李宝霞[1,2] 薛海韵[1,2] 周云燕[1,2] 曹立强[1,2] 

机构地区：[1]中国科学院微电子研究所,北京100029 [2]华进半导体封装先导技术研发中心有限公司,江苏无锡214135 [3]中国科学院大学,北京100049

出　　处：《电子设计工程》2017年第9期6-9,13,共5页Electronic Design Engineering

基　　金：国家高技术研究发展计划(863计划)资助(2015AA016904)

摘　　要：为了实现对集成光路中各通道上的光强进行实时监测,测量nA级微弱电流,提出了两种基于运算放大器的微弱电流测量电路,并完成PCB板制作和电路测量。采用了将微弱电流转换成电压进而放大电压信号的方法,通过实际测试,两种电路达到了0.09 nA/0.2 nA分辨能力,80 nA/120 nA测量范围,实现了光电模块中微弱电流测量需求;同时分析了电路的温度稳定性、占用PCB板的面积、功耗,为不同应用场景下光电模块中微弱电流测量电路的选择提供依据。In order to realize the real-time monitoring of the optical intensity of each channel in optical integrated circuits and the measurement of the nA level weak current, two kinds of weak current measurement circuit based on operational amplifier are put forward; and the PCB circuit board production and measurement are completed. With the method that the weak current is converted into voltage which would be amplified later, through the actual test, the two circuit reached resolution of 0.09nA/0.2nA, the measurement range of 80nA/120nA and the weak current measurement requirements of optoelectronie modules; the occupation of temperature stability, PCB circuit board area, power consumption are also analyzed, which providing the basis of choice for the weak current measurement circuit of photovoltaie modules under different scenarios.

关 键 词：光电模块 NA 运算放大器 微弱电流 温度稳定性 

分 类 号：TN407[电子电信—微电子学与固体电子学]