由于电阻精度引起差分放大电路误差的分析  

Analysis of Error in Differentiating Amplifier Caused by Precision of Resistance Organ

作　　者：张华[1] 邱红[1] 宋智[2] 

机构地区：[1]辽宁师范大学物理与电子技术学院,辽宁大连116029 [2]大连交通大学,辽宁大连116028

出　　处：《现代电子技术》2007年第18期181-182,共2页Modern Electronics Technique

摘　　要：差分放大电路的最大特征就是放大差模信号,抑制共模信号。使用差分放大电路放大信号时,在选择共模抑制比高的集成运放的情况下,为了使输出误差尽可能小,就要保证电阻元件有较高的精度。通过具体计算来说明电阻精度对差分放大电路误差的影响。电阻精度越高误差越小,相反电阻精度越低误差越大。Differential amplifier is characterized by magnifying minus mode signals and restraining sum mode signals. When it is used to magnify signals in a integrate operation amplifier with high restraining ratio,the resistance must be of high precision. This article instantiates that the precision resistance has effect on the error of differential amplifier circuit. The higher precision resistance brings out smaller error. On the contrary, lower precision resistance brings out bigger error.

关 键 词：电阻精度 差分放大电路 共模抑制比 误差 

分 类 号：TN710[电子电信—电路与系统]