申論題

3.(25pt) The circuit configuration to be designed is shown in Figure 3 and the = -40. Assumingβ = 100, 0.7 V, and neglect Early effect. Thermal voltage V_T = 26 mV. Please find the value of = 4 V and I_E = 0.2 mA. And calculate the corresponding values of the AC voltage gain input resistance . Coupling capacitor Cc is large enough that can be treated as short circuit for AC analysis. (5pt*5)