负反馈能改善阻容耦合放大器中何种失真?  

What Kind of Distortion Can Negative Feedback Ameliorate in RC-Coupled Amplifier?

作　　者：蔡久评 

机构地区：[1]南昌高等专科学校计算机电教中心,南昌330009

出　　处：《南昌高专学报》1998年第4期35-39,共5页Journal of Nanchang Junior College

摘　　要：信号输入放大电路后，由于放大电路中存在非线性元件和线性电抗元件，伏输出信号失真。对阻容耦合放大器而言，当放大电路引入负反馈后，只能改善非线性失真，及线性失真中的幅度失真．不能改善线性失真中的相位失真等。负反馈展宽了放大电路的通频带，但不等于改善了频率失真。Signal having input arnplifier electric circuit, output signal is made distortional by the nonlinear components and linear reactance components existing in amplifier eletric circuit. As fOr RC-Coupled amplifier, negative feedback can ameliorate only nonlinear distortion and the range distortion in lineax distortion, but can' t ameliorate phase distortion in linear distortion. Negative feedback widened the pass band of amplifier electric circuit, but this dOesn' t mean ameliorating frequency distortion

关 键 词：阻容耦合放大器 负反馈 非线性失真 放大电路 频率失真 通频带 信号 改善 幅度 相位 

分 类 号：G633.7[文化科学—教育学] TN722[电子电信—电路与系统]