High efficiency RF amplifier and envelope modulator
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United States of America Patent
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Issued Date -
Mar 22, 2007
app pub date -
Feb 27, 2006
filing date -
Feb 28, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An RFID reader, comprising a high-efficiency Class-C power amplifier having an input, an output, and a supply voltage, a modulator coupled to the supply voltage of the Class-C power amplifier, and an RF carrier signal coupled to the input of the Class-C power amplifier. The modulator changes the supply voltage of the Class-C power amplifier resulting in highly controlled amplitude modulation of the RF carrier signal at the output of the Class-C power amplifier.
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