Dynamic adjusting RFID demodulation circuit
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United States of America Patent
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May 20, 2014
Grant Date -
Dec 13, 2012
app pub date -
Jun 6, 2012
filing date -
Jun 10, 2011
priority date (Note) -
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Abstract
A dynamic adjusting RFID demodulator circuit includes an envelope detector having an input for receiving a modulated RF signal, a fixed reference generator coupled to the input of an RC filter, an RF level dependent signal path adding to the fixed reference level at higher RF energy levels, a comparator having a first input coupled to an output of the envelope detector, a second input coupled to an output of the RC filter, and an output for providing a data output signal.
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