一种低噪声交流低电压放大电路设计与实现  

Design and Implementation of Low Noise AC Low Voltage Amplification Circuit

作　　者：严明[1] 魏巍[1] 殷聪如 贾冬宇 YAN Ming;WEI Wei;YIN Cong-ru;JIA Dong-yu(Beijing Orient Institute of Measurement&Test,Beijing 100086,China)

机构地区：[1]北京东方计量测试研究所,北京100086

出　　处：《仪表技术与传感器》2021年第12期115-118,共4页Instrument Technique and Sensor

摘　　要：设计了一种低噪声交流低电压放大电路,采用无源放大和低噪声设计原则,自主研制了高准确度低噪声交流放大器,可测量20μV~2 mV,10 Hz~100 kHz的交流低电压信号,最高分辨力为10 nV,最优不确定度为0.03%,具有准确度高、稳定性好等计量测试性能优点。A low noise AC low voltage amplification circuit was designed in this paper,passive amplification and low noise design principles were adopted,and a high precision low noise AC amplifier was developed.This circuit can measure the AC low voltage ranges from 20μV to 2 mV,the frequency range is 10 Hz~100 kHz,the highest resolution is 10 nV,and the best meas⁃urement uncertainty is 0.03%.The circuit has the advantages of high accuracy and good stability in field of measurement and test.

关 键 词：交流低电压 低噪声 交流放大器 计量测试 

分 类 号：TN721[电子电信—电路与系统]