Phase detector comprising a switch configured to select a phase offset closest to a phase of an amplifier
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United States of America Patent
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Mar 8, 2011
Grant Date -
Aug 28, 2008
app pub date -
Jun 29, 2007
filing date -
Aug 4, 2006
priority date (Note) -
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Abstract
A phase detector includes a plurality of phase detectors located in a phase correction loop, each phase detector configured to receive as input a radio frequency (RF) input signal and an RF reference signal, each of the plurality of phase detectors also configured to provide a signal representing a different phase offset based on the phase difference between the RE input signal and the RF reference signal; and a switch configured to receive an output of each of the plurality of phase detectors and configured to select the output representing the phase offset, that is closest to a phase of an output of an amplifier.
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