Semiconductor device and method for operating the same
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United States of America Patent
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Oct 7, 2014
Grant Date -
Oct 4, 2007
app pub date -
Mar 9, 2007
filing date -
Mar 10, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
To provide a semiconductor device including an RFID which can transmit and receive individual information without checking of the remaining charge of a battery or a replacing operation of the battery in accordance with deterioration over time of the battery for driving, and can maintain an excellent state for transmission and reception of individual information even when power of a radio wave or an electromagnetic wave from outside is insufficient. A battery (also described as a secondary battery) is provided as a power supply for supplying power to the RFID. Then, when power which is obtained from a signal received from outside is larger than predetermined power, its surplus power is stored in the battery; and when the power which is obtained from the signal received from outside is smaller than the predetermined power, power which is obtained from the battery is used for the power for driving.
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