差分电路双端输出交流电压测量方法分析  

Measurement Method for Output AC Voltage of Two Terminal of Differential Circuit

作　　者：张孟忠[1] ZHANG Meng-zhong(Dpartment of Electronic Engineering, Jiujiang University, Jiujiang 332005, Chin)

机构地区：[1]九江学院电子工程学院,江西九江332005

出　　处：《电气电子教学学报》2016年第4期138-139,共2页Journal of Electrical and Electronic Education

摘　　要：本文分析了采用交流毫伏表跨接在差分放大电路两输出端直接测量双端输出交流电压时,会出现不论是差模信号还是共模信号其双端输出交流电压测量值都等于单端输出交流电压测量值的错误。并针对这个错误,给出了直接测量双端输出交流电压的三种方法。If using AC millivoltmeter directly measuring double ended output AC voltage at the output end of differential amplifier , double ended output AC voltage values of both differential mode signal or common mode signal are equal to the single ended output AC voltage value. This paper analyzes the cause of error and for this reason, three methods of correct direct measurement of double ended output AC voltage are given.

关 键 词：共模信号 差模信号 双端输出 单端输出 

分 类 号：TN7[电子电信—电路与系统]