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DRAWBACKS OF TRANSFORMER COUPLED PUSH-PULL AMPLIFIERS → The use of Transformers in Transformer coupled Push Pull AMPLIFIERS make it bulky and expensive especially in this age of Integrated circuits. → Another drawback of the circuit is that it needs two out of Phase signals which necessitates an input tapped transformer or phase inverter, and thus makes the circuitary quite complicated. The above two Drawbacks can be easily solved by using COMPLEMENTARY SYMMETRY PUSH-PULL AMPLIFIER. CIRCUIT DIAGRAM OF COMPLEMENTARY SYMMETRY PUSH-PULL AMPLIFIER CIRCUIT EXPLANATION OF COMPLEMENTARY SYMMETRY PUSH PULL AMPLIFIER This arrangement uses two transistors having complementary symmetry (one transistor is PNP and the other is NPN). The term complementary arises from the fact that one transistor is N-P-N type and the other is P-N-P type. They have symmetry as they are made with the same material and technology and are of same maximum rating. The resistors R1 and R2 provide the voltage d...

CLASS B PUSH PULL AMPLIFIER The circuitry for the Class B Push-Pull amplifier operation is the same as that for the Class A operation except that the device are biased at cutoff. ADVANTAGES OF CLASS B PUSH PULL AMPLIFIER OVER CLASS A It is possible to obtain greater power output. Class B power amplifier provides practically 4 times the power supplied by a single ended amplifier provided load resistance remains the same It gives higher operating efficiency (theoretically 78.5%). It is primarily due to the fact that no power is drawn by the circuit under Zero signal condition. Because of above advantages, a push-pull class B transistor circuit is preferred in systems Where the power supply is limited, such as those operating from solar cells or battery. The automatic cancellation of all even order harmonics from the output makes class B push-pull amplifiers highly desirable communication sound equipment. DRAWBACKS OF CLASS B PUSH-PULL AMPLIFIER The Harmonic distortion is Higher. Self ...