基于叠加定理的放大电路负反馈系数计算  

Negative Feedback Coefficients Calculation for the Amplifier Based on the Superposition Theorem

作　　者：刘雪冬[1] 撒继铭[1] 刘岚[1] 

机构地区：[1]武汉理工大学信息工程学院,湖北武汉430070

出　　处：《电气电子教学学报》2016年第5期87-89,共3页Journal of Electrical and Electronic Education

基　　金：武汉理工大学教研项目"面向卓越工程师的'学习-实践'互动模式研究"(w2014050)

摘　　要：负反馈可以在诸多方面改善放大电路的性能,反馈系数的计算是分析负反馈放大电路的关键步骤。本文提出了基于叠加定理的负反馈系数计算方法。利用叠加定理得出反馈网络输出量的表达式,进而得出计算反馈量的等效电路,最后确定反馈系数。教学实践表明该方法易于理解,便于接受。The negative feedback can improve various performance of an amplifier. The calculation for the feedback coefficient is a key step for the analysis of an amplifier with negative feedback. This paper proposes a calculation method for the negative feedback coefficient based on the superposition theorem by which an expression of the out- put of the feedback network is derived. Thus an equivalent circuit for computing the feedback quantity is obtained. In the end, the feedback coefficient is determined. The teaching practice shows the method is easy to understand and accept.

关 键 词：负反馈 反馈系数 叠加定理 

分 类 号：TN72[电子电信—电路与系统]