| 摘要 |
A semiconductor device having an antenna, an asynchronous counter, and a circuit is provided. The antenna converts a carrier wave into an electrical signal. The asynchronous counter has a plurality of flip-flop circuits, each of which has a plurality of thin film transistors. Alternatively, each of the plurality of flip-flop circuits has a plurality of transistors each including a channel portion formed of single crystal silicon. The circuit generates a power supply voltage using the electrical signal and supplies the generated power supply voltage to the asynchronous counter.
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