Power ampifier Class

Power Amplifier Classes







Class

A

B

C

AB


ConductionAngle

360o

180o

Less than 90o

180 to 360o


Position ofthe Q-point

Centre Point ofthe Load Line

Exactly on theX-axis

Below theX-axis

In between theX-axis and theCentre Load Line


OverallEfficiency

Poor, 25 to 30%

Better, 70 to 80%

Higher than 80%

Better than Abut less than B50 to 70%


SignalDistortion

None if