A tunable inductor arrangement includes a first winding part connected at one end to a first input of the inductor arrangement, a second winding part connected at one end to the other end of the first winding part, a third winding part connected at one end to a second input of the inductor arrangement, and a fourth winding part connected at one end to the other end of the third winding part. For tuning, the inductor arrangement includes a switch arrangement switchable between a first setting series-connecting the first and third winding parts between the inputs, and a second setting series-connecting the first, second, fourth and third winding parts between the inputs. The first and third winding parts are arranged on a chip or substrate with essentially common magnetic fields, and the second and fourth winding parts are arranged to cancel electro-magnetic coupling with the first and third winding parts.

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 and in which a data signal is input to one of a source and a drain. The gate voltage of the first field effect transistor is set depending on the voltage of the other of the source and the drain of the second field effect transistor.