Class A power amplifier

The amplifiers we have discussed have been class A amplifiers. Class A amplifier operate in the center of the load line. This gives the best possible output swing without clipping.

Efficiency: low, maximum 50%

Even when no signal is applied, a high current is flowing (100 mA) and there is a power dissipation in the load.

Distortion: low

Applications: Few audio amplifier (high quality)

Fig. 10-1: Class A amplifier