一、前言文献[1]讨论图1所示的两种反馈放大器,得到如下公式。电阻反馈放大器的闭环电流传递函数为A_I(S)=(I_L)/(I_S)=(μ_0S_1S_2)/(S~2+S(S_1+S_2))+S_1S_2(1+μ_0λ_0)(1)其中μ_0是正向直流电流放大系数,λ_0是直流电流反馈系数λ_0=(I_f)/(I_L)=(R_e)/(R_f+R_e)(2)-S_1和-S_2是正向电流传递函数(开环)μ(S)的极点 First, foreword [1] Discusses the two kinds of feedback amplifiers shown in Fig. 1, get the following formula. The closed-loop current transfer function of the resistor feedback amplifier is: A_I S = I_L / I_S = μ - S ⁢ 1 S ⁢ 2 / S ⁢ S + S ⁢ S ⁢ S + S ⁢ 2 + S ⁢ 1 ⁢ S 2 1 + μ_0λ_0 where μ_0 Is the forward DC current amplification factor, λ_0 is the DC current feedback coefficient λ_0 = (I_f) / (I_L) = (R_e) / (R_f + R_e) (2) -S_1 and -S_2 are the forward current transfer function (S) pole