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Semiconductor device, electronic appliance using semiconductor device, and document using semiconductor device

  • US 8,803,663 B2
  • Filed: 12/22/2009
  • Issued: 08/12/2014
  • Est. Priority Date: 12/25/2008
  • Status: Expired due to Fees
First Claim
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1. A semiconductor device comprising:

  • an antenna configured to receive carrier waves and convert the carrier waves into an AC signal;

    a rectifier circuit configured to rectify the AC signal into a DC voltage;

    a demodulation circuit configured to demodulate the AC signal into an encoded signal;

    an oscillator circuit configured to generate a first clock signal by supply of the DC voltage;

    a synchronizing circuit configured to generate a synchronized encoded signal by synchronizing the encoded signal with use of the first clock signal;

    a decoder circuit configured to decode the synchronized encoded signal into a digital signal; and

    a register configured to store the digital signal with use of the synchronized encoded signal delayed from the first clock signal as a second clock signal.

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