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 VT = 26 mV. Please find the value of = 4 V and IE = 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)

2.(30pt) For the circuit shown in Figure 2, the transistor parameters of Q1 and Q2 are: = 1.2 V, = 1.6 mA/V2, and neglect channel length modulation effect. Let R1 + R2 + R3 = 300 kΩ and Rs = 10 kΩ. = 5 V, -Vs =-5 V. (a) Please determine the R1, R2, R3 and RD such that DC current ID = 0.4 mA and DC voltage Coupling capacitor Cc is large enough that can be treated as short circuit for AC analysis. Please also find the voltage gain of small signal. (5pt*6)

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