462共集共集放大电路 华中电信系 2.共集共集放大电路的A。、R1、R (1+P)R +(+B)R1 式中 Rs Re 压B1B2 Ibe=belt(1+)rbe RLFRIRL R=Rbll[et(1tBRr'LI R=R R、‖Rb+rn 1+β HOME end BACKNEXT4.6.2 共集—共集放大电路 end 2. 共集共集放大电路的Av、 Ri 、Ro   i o v v Av     be L L 1 ' 1 ' r β R β R        1 || || s b be o e R R r R R 式中 ≈12 rbe ＝rbe1＋(1＋1)rbe2 R L＝Re ||RL Ri ＝Rb ||[rbe＋(1＋)R L ]