Advantages and Disadvantages of Push Pull Amplifier


Advantages and Disadvantages of Push Pull Amplifier

Advantages:

1.       Even harmonics are absent in the output.
2.       The problem of core saturation and non-linear distortions will not appear because of cancellation of D.C. components of collector current.
3.       The output is double as that offered by a single ended stage.
4.       The effect of ripple voltage of the power supply due to inadequate filtering are balanced out because of flow of ripple current in opposite direction in the primary of the output transformer.

Disadvantages:

1.       Two transistors have to be used.
2.       It requires two equal and opposite voltages at the input. Therefore push pull circuit requires the use of driver stage to furnish these signals.
3.       If the parameter of the two transistors are not the same, there will be unequal amplification of two halves of the signal.
4.       The circuit gives more distortion.

5.       Transformer used are bulky and expensive.

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