Question

Problem 1 The transistors Q1 and Q2 have beta=50 and Va=100 V, Vcc= +7.5 Volts, Rgen=1 kOhm, RL=1 kOhm. Bias Q1 at 0.5 mA collector current, Q2 at 1 mA collector current, bias the emitter of Q2 at 6.5V, the Q2 collector at 3 V, and the Q1 emitter at 1 V. The parallel combination of Rb1 and Rb2 is to be 10 kOhm. (a) Find all unspecified resistor values. (b) Find the small signal gain and the input impedance of Q2 (Vc2/Vb2) and Rin2 (c) Find the small signal gain and the input impedance of Q1 (Vc1/Vb1) and Rin1) (d) Find the input impedance *** of the amplifier **** , Vin/Vgen, Vout/Vin, and Vout/Vgen

Answer 1