本文阐述用常用的电路分析方法将闭环的负反馈放大电路等效成开环式放大电路。用分析普通放大电路的通用方法分析计算闭环的负反馈放大电路。概念清楚,分析简便,思路灵活,计算结果与现行框图法一致。 This article describes the use of common circuit analysis methods will be closed-loop negative feedback amplifier circuit equivalent to the open-loop amplifier. Analyze and calculate the closed-loop negative feedback amplifier circuit by the general method of analyzing common amplifier circuit. The concept is clear, the analysis is simple, the idea is flexible, and the calculation result is consistent with the current block diagram method.