B(Res +Ro3) [R, I(e6 +Re)]+rhes+(Res + r 20×8.5 k9=2664k9 2.8+2.5+8.5 第一级单端输出的共模电压增益 R 4×5.1 A 0.96×10-3 1+gn(2)1+4×2×2664 共模抑制比 =10.6×10 A,0.96×10 =        + +  = +         + + + + + = + k k R r R r R R R R r r b e e b e e p e p o ce 2664 2.8 2.5 8.5 20 8.5 200 1 [ || ( )] ( ) ( ) 1 3 6 6 5 5 3 5 3 5  第一级单端输出的共模电压增益 3 m o L1 ' m VC1 0.96 10 1 4 2 2664 4 5.1 1 g (2r ) g R A − = −  +    = − + = − 共模抑制比 3 3 VC1 VD1 CMR 10.6 10 0.96 10 10.2 A A K =   = = −