This design results in minimized crossover distortion, as that of the Class B amplifier design, as both output transistors conduct for a short period of time each cycle during the zero crossover period. An AB amplifier design allows for the multiple switching transistors in the complementary output stage to conduct an opposite half-cycle of the input waveform prior to combination at load. The main feature benefit is that Class AB amplifiers are biased so that the output current flows for less than one full-cycle of the input waveform, but for more than a half cycle of the waveform. Review of High Power Amplifier Applications: Class AB High Power AmplifiersĪ class AB amplifier is a highly used amplifier design for high power RF applications, as well as other applications that require high power gain with minimal signal distortion.
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