摘要
提出了一种测量锁相放大器正交分量精度的方法。以四端互感和三支路电抗分流器为基础,在5 mV量程,频率从20~200 kHz下对锁相放大器进行校准,并对测量结果进行了不确定度评定。该方法也适用于锁相放大器其它量程的校准。
This paper describes a method for calibrating the accuracy in quadrature part of the lock-in amplifier at 5 mV ranges.The method is based on the use of the four-terminal mutual inductor and three-branch binary inductive current divider.The measurement standard uncertainties are presented at frequencies from 20 kHz to 200 kHz at 5 mV range.This method is also applicable in other ranges.
出处
《电测与仪表》
北大核心
2012年第S1期170-173,共4页
Electrical Measurement & Instrumentation
关键词
四端互感
电抗分流器
电流电压法
二进制感应分压器
four-terminal mutual inductor,binary inductive current divider,current-voltage method,binary inductive voltage divider
