Radio frequency power amplifier and corresponding method
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United States of America Patent
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Apr 1, 2008
Grant Date -
Sep 28, 2006
app pub date -
Mar 25, 2005
filing date -
Mar 25, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A radio frequency power amplifier and corresponding methods are arranged and configured to drive or provide a radio frequency signal to a resonant load. The amplifier includes a radio frequency switching stage with an output that is coupled to a resonant circuit and configured to provide an output signal with amplitude modulation corresponding to amplitude modulation of an input signal when powered from a fixed voltage power supply and a feedback control system coupled to the input signal and the output signal. The feedback control system includes a sequencer configured to provide a sequencer output that is used to drive the radio frequency switching stage, where the sequencer output has an OFF state that begins at a variable time corresponding to the input and output signal.
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