几种多环负反馈放大电路模式与浅析

Several Models of the Multi-loop Negative Feedback Circui t and Their Analysis

实际的负反馈放大电路 ,并非都是由基本放大电路和反馈网络构成一个闭环系统 <1>,还有由多个基本放大电路和多个反馈网络构成的多环系统 (多环负反馈电路 ) <2 >.给出几种多环负反馈放大电路的一般方框图和“闭环”增益 (传输函数 )一般表达式 。

The actual negative feedback amplifying circuit doesn't form a c losed-loop only from the basic amplifying circuit and the feedback network ,but forms the multi-loop system (multi-loop negative feedback circuit )from sever al basic amplifying circuits a nd several feedback networks.Here this article describes and analyses the genera l charts of several multi-loop negative feedback amplifying circuits and the ge neral formula of the “closed-loop” amplifying (transfer function).