【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。更多还原

【Abstract】 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 output 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.更多还原