| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a semiconductor device by which stable wireless communication is performed. <P>SOLUTION: The semiconductor device includes a signal processing circuit, an antenna circuit that is connected to the signal processing circuit, and a storage means that supplies electric power to the signal processing circuit. The signal processing circuit receives and transmits information through the antenna circuit, generates a direct current voltage from signals received by the antenna circuit, and stores the direct current voltage in the storage means. Furthermore, the antenna circuit has an antenna portion that receive signals by an electromagnetic induction method and an antenna portion that receives signals by a microwave method so that the signals of frequencies from a wide band can be received. Because signals from a wide band can be received, the environment in which the storage means can be changed is widened. <P>COPYRIGHT: (C)2008,JPO&INPIT |
