已知: U1 = U2/10000; U2 = Uo;
则: Uo = -50*Ib*(R4//R5//R6);
Ui = Ib*R3 + U1 = Ib*R3 - 50*Ib*(R4//R5//R6)/10000;
那么 Au=Uo/Ui=??;
另;
因为: U2 = Au*Ui;所以 U1 = Au*Ui/10000;
Ui = I1*(R1//R2) = Ib*R3 + U1;
那么,Ui = Ib*R3 + U1 = Ib*R3 + Au*I1*(R1//R2)/10000;
I = I1 + Ib;
那么 Ri1 = Ui / I =
而:Ri2 = R4//R5;
好了,自己也得动脑筋去解方程吧