Method and apparatus for providing receiver dual channel coupling in a reader for RFID tags
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United States of America Patent
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Jul 24, 2001
Issued Date -
N/A
app pub date -
Jun 23, 2000
filing date -
Jun 23, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
The invention reduces recovery time in a receiving coil or antenna of an RFID reader by generating a reference voltage that then clamps the node on which the desired signal is monitored. The coil is coupled to parallel channels. One channel has a recovery time or capacitance very much less than the other parallel channel. The two channels have a monitored node which are clamped together or at least close together by means of a Schottky diode. The monitored nodes of both channels are coupled to the inputs of a differential amplifier. The output of the amplifier is the conditioned received signal from the coil used in the reader as the sensed signals from the RFID tags.
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