§5.1镜象电流源 B=B=B CC BE2 ,+2 R C B lR=BEF↓2l =lc2+2/B (1+ lE Vo -v CC BE R R 基本镜象电流源 输出电阻r=r2§5.1 镜象电流源 BE1 BE2 BE 1 2 V =V =V b = b = b I I I I I I R C B C B C ( ) = + = + = + 1 2 2 2 2 1 2 b 2 CC BE R o ce r r R V V I = − = 基本镜象电流源 输出电阻