Radio frequency power amplifier and method using a controlled supply
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United States of America Patent
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Jan 6, 2009
Grant Date -
Oct 25, 2007
app pub date -
Jun 15, 2007
filing date -
Mar 25, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A radio frequency power amplifier includes a feedback control system coupled to an input signal and a first feedback signal and configured to provide an output; a controlled supply configured to provide power that is controlled in accordance with a signal; and a radio frequency gain stage powered from the controlled supply, driven by the output from the feedback control system, and configured to provide an output signal at the radio frequency to a resonant load, where the first feedback signal corresponds to the output signal. Some embodiments include a sequencer in the feedback control system and others utilize an additional feedback loop to control the power provided by the controlled supply.
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