分析负反馈放大电路的等效解析法

Equivalent Analysis for Analyzing Negative Feedback Amplifier Circuit

本文介绍的等效解析法是:找出代表所有负反馈放大电路的母体等效电路;列出它在各种输入下的节点方程组;从它的电导行列式中解读出一组开环增益和反馈系数;求解並分析所有解,找出並证明它们共用的通式-闭环增益定理。由此可以引出更简单的闭环增益实用定理和求解闭环输入电阻和输出电阻的简易方法。

Equivalent analytic method is to find out a matrix equivalent circuit which can be on behalf of all the negative feedback amplifier circuit; list its circuit equations under various inputs; from its conductance determinant decipher a set of open-loop gain and feedback factor; to solve and analyze all solutions,find out and prove their common formula--closed-loop gain theorem. It can lead more simple closed-loop gain practical theorem and to the simple method for the close-loop input resistance and output resistance.