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Power storage device and semiconductor device provided with the power storage device

  • US 7,944,172 B2
  • Filed: 07/21/2010
  • Issued: 05/17/2011
  • Est. Priority Date: 08/31/2006
  • Status: Expired due to Fees
First Claim
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1. A semiconductor device comprising:

  • an antenna;

    a power supply portion electrically connected to the antenna;

    a battery electrically connected to the power supply portion; and

    a counter circuit electrically connected to the power supply portion,wherein the counter circuit counts charging time of the battery,wherein the counter circuit includes flip flop circuits,wherein the power supply portion includes a power supply circuit, andwherein the power supply circuit controls a voltage level of an electric signal outputted from the battery.

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