Power control loop and LO generation method
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United States of America Patent
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Jun 9, 2009
Grant Date -
Mar 22, 2007
app pub date -
Feb 27, 2006
filing date -
Feb 28, 2005
priority date (Note) -
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Abstract
A method for use in a RFID reader, the method comprising providing an output signal from an amplifier of a transmitter, attenuating the output signal via a step attenuator, detecting and comparing the attenuated output signal to a reference value, and adjusting power to the amplifier until the attenuated output signal is substantially equal to the reference value. The attenuated output signal drives a local oscillator signal of a receiver thereby canceling noise generated by the transmitter in the receiver.
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