Semiconductor device
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United States of America Patent
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Mar 15, 2011
Grant Date -
Apr 24, 2008
app pub date -
Oct 11, 2007
filing date -
Oct 18, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Of a wireless communication system, an RF tag which can operate normally even when a communication distance is extremely short, like the case where the RF tag is in contact with a reader/writer, whereby the reliability is improved. The RF tag which communicates data by wireless communication includes a comparison circuit which compares electric power supplied from outside with reference electric power and a protection circuit portion which is operated when the electric power supplied from outside is higher than the reference electric power in the comparison circuit.
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