Question 22
1. Distinguish between Class A and Class AB in terms of efficiency, circuit complexity, and distortion. [2 Marks]
2. a) Explain how to improve the efficiency of a class A power amplifier. [2 Marks]
b) The output of a certain two-supply class B push-pull amplifier has a Vcc of 20V. If the DC current (Icc) is 0.5 A, find the efficiency.