基于负反馈放大电路的电压增益估算及误差分析

Based on negative feedback amplifier circuit of voltage gain estimation and error analysis

在工程实际中,负反馈放大电路的电压增益大多依据套用电路模型和公式的方法进行估算。集成运放以及由分立元件组成的多级负反馈放大电路,估算误差较小;而由分立元件组成的单级放大电路估算误差较大。本文探讨了不同电路形态下,电压增益的估算及误差分析方法。

In engineering practice,the negative feedback amplifier circuit voltage gain is mostly based on applied circuit model and the formula of the estimation method.Operational amplifier is integrated,and discrete component is composed of multi-stage feedback amplifying circuits,so the estimation error is smaller.The single-stage amplifier circuit composed of discrete component estimation error is bigger.This paper discusses the different forms of circuit,the voltage gain of estimation and error analysis method.