ENVELOPE RESTORATION SCHEME FOR LINEAR HIGH-EFFICIENCY POWER AMPLIFICATION

摘要

An apparatus for providing a waveform as a switched input into an output matching network (12) of a standard class E amplifier. The apparatus includes a switch (16) in communication with the input and the combining device (15) receiving amplitude (20) and phase information (24) from the primary waveform. The combining device (15) functions to combine the amplitude and phase information to create a control signal which is used to control the switch (16) and create a secondary waveform for input to the matching network. In this way, an amplitude modulated waveform is amplified at high efficiency, enabling application of either all or part of the phase and/or amplitude modulation at the input of the amplifier.