返回 4闭环参数: (1)闭环的增益:A=.=1+A1B1 (2)闭环电增益:Am==yB2=4y (3)输入阻城.B1+A1B R 而A1= lim A R→0 (4)输出阻抗:Rr=(1+AaB1)R0 而A Rc2 Rr"→0 Rb21 RbI 5深度反馈(+A1B;)>>1时 B.5~+R R 2 R Rs a R,(Re2+R)R B: R e2P R6224 闭环参数： (1) 闭环的增益： i s i i s s o isf 1 A B A i i A +  = = (2) 闭环电压增益： s L isf s s 0 L s 0 usf R R ' A i R i R ' u u A =   = = (3) 输入阻抗: i i i i f 1 A B R R + = 而 is R Ai A s →  = lim (4) 输出阻抗: o f AissBi R0 R = (1 + ) 而 i s R ' 0 A iss lim A L → = 5 深度反馈 ( 1 A B ) 1 + i i   时 e 2 s e 2 f L s L i usf e 2 F e 2 i isf R R ( R R )R ' R R ' B 1 A R R R B 1 A  +   = +  = io Rif Rof us uo + _ 返回