A_(od)≠∞,r_(id)≠∞时比例运算电路的分析与计算

AN ANALYSIS AND CALCULATION OF SCALING CIRCUIT WHEN A_(od)≠∞,r_(id)≠∞

分析了两种比例运算电路在开环放大倍数Aod和差模输入电阻rid均为有限值时的闭环特性 ,导出了Avf。

According to the theory of negative feedback amplifier,the closed characteristics of two kinds of scaling circuits are analyzed when both A od and r id are finite. The expressions for calculating the closed voltage gain,input and output resistance are given.