RFID tag and driving method thereof
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United States of America Patent
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May 22, 2012
Grant Date -
Apr 8, 2010
app pub date -
Oct 2, 2009
filing date -
Oct 3, 2008
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The wireless tag includes a circuit which receives an AC signal from the outside and detects an envelope, a detection circuit which detects the level of electric power supplied from the outside and outputs a potential corresponding to the detected electric power, a protection circuit which changes an impedance of a circuit receiving the electric power in accordance with the electric power output from the detection circuit, a selection circuit portion which selects whether the electric power output from the detection circuit is input to the protection circuit.
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