Contactless radiofrequency device featuring several antennas and related antenna selection circuit
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United States of America Patent
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N/A
Issued Date -
Mar 20, 2008
app pub date -
May 14, 2007
filing date -
May 16, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The invention relates to an integrated circuit for contactless radiofrequency device connected to a first antenna and to a second antenna designed to receive a radiofrequency signal coming from a reader. According to a main characteristic, the integrated circuit includes a first rectifier circuit and a second rectifier circuit to rectify each radiofrequency signal received from the first antenna and the second antenna, respectively, so as to produce two positive output voltages V1 and V2, the rectifier circuits being mounted in parallel in order to select an output voltage value that corresponds to the maximum voltage value between V1 and V2.
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