申論題

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 R_D such that DC current I_D = 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)