Abstract: Starting from the fact that amplitude of the basic harmonic of the current, flowing through load resistor of the class E power amplifier, is proportional to direct current flowing through the collector battery of the switching transistor, introduction of a current mirror in emitter circuit of the transistor in which reference branch is situated a generator of modulating voltage is proposed. It can be easily proven that total current of this mirror, which is also direct current of the collector battery has shape (waveform) of the amplitude of AM signal.
Keywords: Power amplifier, class E operation, efficiency, amplitude modulator, current mirror.