申論題

2. For the circuit shown in Figure 2, the transistor parameters of Q₁ and Q₂ are: = 1.2 V, W/L = 1.6 mA/V², and neglect channel length modulation effect. Let R₁ + R₂ + R₃ = 300 kΩ and = 10 kΩ. = 5 V, - = -5 V.

(b) If = 40 kΩ and R, = 2.5 kΩ. Coupling capacitor is large enough that can be treated as short circuit for AC analysis. Please also find the voltage gain and input resistance of small signal.