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Composite IC card

  • US 6,585,166 B1
  • Filed: 12/21/2001
  • Issued: 07/01/2003
  • Est. Priority Date: 06/29/1999
  • Status: Expired due to Fees
First Claim
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1. An IC (Integrated Circuit) card which has a semiconductor integrated circuit integrating an internal circuit for communication with an external device, an antenna and a connector, and is capable of supply of electric power and transmission and reception of signals with the external device by either a contact coupling using the connector or a non-contact coupling using the antenna, the IC card comprising:

  • coupling detecting means for detecting a contact coupling and a non-contact coupling, and communication cut-off means for cutting off the communication so that the communication is not performed on either of the couplings when there are supplied electric power or a signal for inducing the other coupling during communication on one coupling.

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