复杂反馈系统闭环增益的分析

Analysis of the Closed Loop Gain in the Complicated Feedback Circuit

该文针对复杂反馈系统增益分析的需求，根据一般反馈系统的分析方法，结合自动控制原理中对结构的简化法则，采用方框图法，解决带有套环或交叉环的复杂电路的闭环增益问题，具有推导方法简单、物理概念清晰的特点。

This paper attempts to suggest a way to analyse and to obtain the closed loop gain in the complicated feedback circuit with linked or cross loop.The method is introduced in the light of analysis of the common feedback system and the simplified diagram in the automatic control. Block diagram method is presented.This method is simple in calculation and clear in the concept of physics.