申論題

3.The circuit configuration to be designed is shown in Figure 3 and the = -40. Assuming β = 100, = 5 V, - = -5 V, = 10 kS, = 100 kΩ, 0.7 V, and neglect Early effect. Thermal voltage = 26 mV. Please find the value of to achieve DC voltage = 4 V and = 0.2 mA. And calculate the corresponding values of the AC voltage gain , input resistance . Coupling capacitor is large enough that can be treated as short circuit for AC analysis.