| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a semiconductor device including an RFID, which can transmit and receive individual information without checking remaining capacity of a battery or replacing the battery, owing to aging deterioration of the battery for driving power supply, and can maintain a favorable communication state of individual information even when electric power, as the power source for driving, from an external radio wave or electromagnetic wave (carrier wave) is not sufficient. <P>SOLUTION: The semiconductor device comprises: a signal processing circuit; a first antenna circuit and a second antenna circuit connected with the signal processing circuit; and the battery connected with the signal processing circuit. The first antenna circuit transmits and receives a signal for transmitting data stored in the signal processing circuit, while the second antenna circuit receives a signal for charging electric power in the battery, and the signal received by the first antenna circuit is differed in wavelength from the signal received by the second antenna circuit. <P>COPYRIGHT: (C)2008,JPO&INPIT |
