论负反馈对低频特性的影响  

A Discusing the LF Property of Negative Feedback

作　　者：黄秋光 董兵 

机构地区：[1]信阳陆军学院,464000

出　　处：《信阳师范学院学报（自然科学版）》1993年第4期414-418,共5页Journal of Xinyang Normal University(Natural Science Edition)

摘　　要：本文通过典型的电压串联负反馈放大器低频特性的深入分析,着重讨论了反馈网络为复阻抗时的低频特性,证明了在几乎所有的电子技术基础理论教科书中推导出的下限频率的公式f_(Lf)=f_L/(1+A_mF)是不成立的.Through the analysis of LF property of the typical voltage-series negative feedback amplifies,this essay explains the LF property of feedback network of complex impedence,and proves closed-lop lower limit frequency formuler,fLf =fL/(1+AmF ,which is regarded as correct in most fundamental electronic technique textbooks,and in fact is wrong.

关 键 词：负反馈 低频特性 下限频率 影响 

分 类 号：TN721.2[电子电信—电路与系统]