Transistor Push Pull Power Amplifier
This is a The Push Pull Power Amplifier circuit. This circuit is a class B push pull amplifier. When there is no signal input, the TR3 and TR2 are not conducting. If there is no signal input, this circuit draw a very little current. This circuit has a phase splitter that is built from T1 and TR1 which opposite polarity signals appearing at the ends of T1 secondary. To avoid a crossover distortion, this circuit uses R2 and R1 to apply a small forward bias. Here is the circuit:
If there is a signal in, the TR3 conducts on negative half of the waveform only and positive half is conducted by TR2. T2 will provide an amplified input, which is combination of both halves current flow on the top half of T2 primary and bottom half of T2 primary. The current will flow through the bottom half of T2 primary when TR3 conducts and when the TR2 conduct, the current flows down through the top half of T2 primary. However, the non-linear characteristics of the emitter/base junction can cause crossover distortion.