申論題

2. For the follower circuit in Fig. 3, let transistor Q₁ has β = 50 and transistor Q₂ has β = 100, = 5 V, = 1 MΩ, I₁ = 50 κA, I₂ = 5 mA and neglect the Early effect. Use constant voltage drop model of = 0.7 V. Thermal voltage = 25 mV.

(b) If a load resistance 6201e198c95be. = 1 kΩ is connected to the output terminal, find the voltage gain from the base to the emitter of Q₂ and the input resistance 6201e1c213cbb. looking into the base of Q₂.