1)Ib*Rb + Ube = Vcc ---> Ib = (Vcc - Ube)/Rb = 0.0565 mA = 56 uA
Ic = Ib*β = 1.41 mA, Uce = Vcc - Ic*Rc = 4.95 V;
2)微变等效电路
![](https://iknow-pic.cdn.bcebos.com/242dd42a2834349b12dd68e5d9ea15ce37d3bef2?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
3)rbe = 300 + 26/Ib = 760(Ω)
Au = -β*Rc/rbe
4)RL'= Rc//RL = 2.5(KΩ);
Au = --β*Rc'/rbe;
5)Ri = Rb//rbe;Ro = Rc;
其实此题在教材中必有详细讲解的,将具体参数代入就是了啊;