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Noncontact IC card interface unit and communication system using the interface unit

  • US 5,664,157 A
  • Filed: 03/30/1995
  • Issued: 09/02/1997
  • Est. Priority Date: 04/08/1994
  • Status: Expired due to Term
First Claim
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1. A noncontact IC card interface unit for communicating between an external host computer and a noncontact IC card comprising:

  • a connector for connecting an interface unit to an external host computer;

    first control means electrically connected to said connector for controlling a bidirectional signal relative to said external host computer;

    second control means electrically connected to said first control means and receiving an output signal from said external host computer through said first control means for controlling data communication with a noncontact IC card in response to the output signal;

    electromagnetic-wave signal communicating means electrically connected to said second control means for transmitting and receiving a bidirectional electromagnetic-wave signal relative to the noncontact IC card;

    a bus to which said first control means and said second control means are connected; and

    a memory electrically connected to and accessible through said bus by said first control means and said second control means.

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