| 摘要 |
<P>PROBLEM TO BE SOLVED: To facilitate setting of a resonance frequency. <P>SOLUTION: A semiconductor device includes an antenna functioning as a coil, a capacitor electrically connected to the antenna in parallel, a passive element forming a resonance circuit with the antenna and the capacitor by being electrically connected to the antenna and the capacitor in parallel, a first field effect transistor controlling whether the passive element is electrically connected to the antenna and the capacitor in parallel or not, and a memory circuit. The memory circuit includes a second field effect transistor which includes an oxide semiconductor layer where a channel is formed, in which a data signal is input to one of a source and a drain and in which the gate voltage of the first field effect transistor is set depending on the voltage of the other of the source and the drain. <P>COPYRIGHT: (C)2013,JPO&INPIT |
