申論題

2.(20%) Figure 2 shows a BJT circuit with the = 200 kΩ, RE = 5kΩ, Rc =2 kΩ, R_L= 5 kΩ. The BJT has0.7 V, β = 100, thermal voltage V_T = 25 mV. Neglect the Early effect. (a) Please find the DC collector current I_c. (b) For AC analysis, please find the input resistance Rin, output resistance Rout and overall gain . (5%*4)