| abstract |
Resonance frequency is easily set. An antenna having a function as a coil, a capacitor element electrically connected in parallel with the antenna, and an antenna and capacitor element electrically connected in parallel with the antenna and capacitor element A passive element that constitutes a resonance circuit, a first field effect transistor that controls whether or not the passive element, the antenna, and the capacitive element are electrically connected in parallel, and a memory circuit, A second oxide semiconductor layer including an oxide semiconductor layer in which a channel is formed; a data signal is input to one of a source and a drain; and a voltage of a gate of the first field-effect transistor is set in accordance with the other voltage Field effect transistor. [Selection] Figure 1 |