RFID READER SYSTEM AIDED BY RF POWER OF MEASUREMENT
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United States of America Patent
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Issued Date -
Feb 28, 2008
app pub date -
Jan 11, 2007
filing date -
Jan 12, 2006
priority date (Note) -
Abandoned
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Abstract
Methods and circuits for using measurement based threshold(s) to detect Radio Frequency IDentification (RID) tag responses in readers are described. Tag response itself is detected based on a measurement that is compared to a measurement during a tag silent period. Beginning and/or end of tag response are also detected using multiple measurements during tag response. The initial detection threshold may be replaced with a lower second threshold once demodulation of the tag response begins.
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