本文针对多环负反馈放大电路的分析问题,提出了多次拆环方框图分析法。这种分析方法的基本思想在于通过多次拆环来使多环负反馈放大电路单向化,然后分层次进行计算,并用递推形式定义了多环负反馈放大电路放大倍数的一般表达式。通过举例,说明了这种分析方法的应用,并用微变等效电路分析法,证明了分析结果的正确性。 In this paper, multi-loop negative feedback amplifier circuit analysis, put forward a number of demolition ring block diagram analysis. The basic idea of ​​this method is that the multi-ring negative feedback amplifier is unidirectionally demultiplexed by multiple demultiplexing cycles and then calculated hierarchically. The general expression of the magnification of the multi-loop negative feedback amplifier is defined by recursion. An example is given to illustrate the application of this analytical method and to prove the correctness of the analysis by using the micro-equivalent circuit analysis method.