To provide a semiconductor device that is capable of wireless communication, which can transmit and receive individual information, without checking remaining capacity of a battery or changing batteries due to deterioration with time in the battery for a drive power source, and maintain a proper transmission/reception state of individual information, even when electric power of an electromagnetic wave from a reader/writer is not sufficient.
The semiconductor device includes a signal processing circuit, a first antenna circuit connected to the signal processing circuit, an antenna circuit group, a rectifier circuit group, and a battery connected to the signal processing circuit. The first antenna circuit transmits and receives a signal for transmitting data stored in the signal processing circuit and drives a power supply circuit. Each antenna circuit of the antenna circuit group receives a signal for charging the battery and includes antennas each of which has a different corresponding frequency.
TAMURA TERU
JP2003070187A | 2003-03-07 | |||
JP2006519580A | 2006-08-24 | |||
JP2000090221A | 2000-03-31 |
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