Complementary Symmetry Class B Amplifier Circuit Diagram. Thus for full swing the power conversion efficiency of the complementary symmetry reaches is maximum value of approximately 75 this number is much greater than that of the single ended emitter follower that we discussed earlier. The exact technical designation of the above circuit is complementary symmetry class ab power amplifier.

You may have noticed that the complementary symmetry configuration has a small problem which is that no signal can propagate when 0 7 v s 0 7 because both bjt. A complimentary symmetry amplifier is a power output stage using two transistors. One is an npn and the other is pnp and normally the designer will use transistors that are compliments of one.

Complementary symmetry push pull class b amplifier.

Just like the class b configuration push pull mechanism is essential for realizing practical class ab power amplifiers. When the input signal is positive q1 starts conducting and produce a replica of the positive input at the output. 1 is a circuit diagram showing a conventional amplifier circuit using complementary symmetry transistors. The push pull amplifier which was just discussed improves efficiency but the usage of center tapped transformers makes the circuit bulky heavy and costly.