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IC chip for contactless IC card

  • US 6,525,362 B2
  • Filed: 11/08/2001
  • Issued: 02/25/2003
  • Est. Priority Date: 11/16/2000
  • Status: Expired due to Fees
First Claim
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1. An IC chip for contactless IC card for rectifying and smoothing a signal provided from an external source to feed electric power to signal processing circuits and a memory circuit both integral with the IC chip and for reading and writing data to and from said memory circuit, comprising:

  • a rectifier circuit for rectifying a signal received contactlessly from the external source to provide a power supply;

    a smoothing capacitor coupled to said rectifier circuit;

    an internal signal processing circuit coupled to said rectifier circuit to receive said power supply;

    a booster circuit connected to said rectifier circuit to receive said power supply, said booster circuit for boosting a voltage of said power supply and providing a boosted power supply; and

    a memory circuit coupled to said booster circuit to receive said boosted power supply.

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