What is a push-pull power amplifier?

Jacktang

What is a push-pull power amplifier? [Copy link]

Using two transistors with the same characteristics, make them both work in Class B state, one of which works in the positive half cycle and the other in the negative half cycle, and then try to combine the output waveforms of the two tubes together on the load to obtain a complete output waveform. This amplifier is called a push-pull power amplifier. When the positive voltage comes, V1 is turned on, V2 is turned off, and it is output after being amplified by V1; when the negative voltage comes, V2 is turned on, V1 is turned off, and it is output after being amplified. Finally, they are all output after being transformed by T2. However, since the power amplifier tube is not turned off when Vbe<0, but is already in the cut-off state when Vbe=0.5, the two half cycles cannot be accurately combined, and crossover distortion occurs.