Class Ab Push Pull Amplifier Circuit Diagram. The class ab push pull output circuit is slightly less efficient than class b because it uses a small quiescent current flowing to bias the transistors just above cut off as shown in fig. The collector current is almost zero in the absence of the signal.

Class Ab Amplifier Design And Class Ab Biasing
Class Ab Amplifier Design And Class Ab Biasing from www.electronics-tutorials.ws

5 5 1 but the crossover distortion created by the non linear section of the transistor s input characteristic curve near to cut off in class b is overcome. Circuit diagram for class b amplifier is given below. A push pull amplifier circuit diagram is shown above.

Class ab power amplifiers.

At this moment q2 remains in off state. The class ab push pull output circuit is slightly less efficient than class b because it uses a small quiescent current flowing to bias the transistors just above cut off as shown in fig. The amplifiers single output transistor conducts for the full 360 o of the cycle of the input waveform. In the circuit diagram two transistors t1 t2 are placed back to back.