Assume VAo for each transistor CC amplifier CS anplifier CE

Assume VA-o for each transistor. C-C amplifier C-S anplifier C-E amplifier +15 V , Re 47 91 k02 Cs H 2: 120 k2 Ca 1.6L0 250 (a) (3 pts) Describe the role of each capacitor C1 ....C6 and how it influences the large l and/or small signal model.

Solution

1. C₁ is a Blocking Capacitor . It blocks DC signal input to Amplifier.

2. C₂ is a Bypass Capacitor. It bypasses AC current to ground.

3.C₃ is Coupling Capacitor.It couples output of first amplifer amplifier to second amlifier input.

4.C₄ is Emitter Bypass capacitor. It bypasses emitter current of transistor to ground.

5.C₅ is also coupling Capacitor. It couples output of second amplifer amplifier to third amlifier input.

6.C₆ is also a Blocking Capacitor . It blocks DC signal of Amplifier to load.