Noncontact type IC card and system for noncontact transfer of information using the same
First Claim
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1. In a system for nonconduct transfer of information between an IC card and a card reader/writer, the improvement comprising:
- a first integrated circuit chip on the IC card, said first chip comprising a card logic circuit for controlling the operation of said card, card information transfer means on the integrated circuit chip including at least a first electromagnetically inductive coil for effecting electromagnetic transfer of information and means for coupling said first coil to said card logic circuit, said first coil having multiple spiral windings with at least the innermost of said windings enclosing an area on the chip which is smaller than the area occupied by the logic circuit;
a second integrated circuit chip on the reader/writer, said second chip comprising reader/writer information transfer means having at least a second electromagnetically inductive coil for effecting electromagnetic transfer of information to and from said first coil of said IC card; and
supply means located at least partly on said IC card for providing power to said first integrated circuit chip.
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Abstract
A system for noncontact transfer of information between an IC card and a card reader/writer, wherein the IC card and the card reader/writer each comprises an IC chip having a logic circuit and at least one electromagnetically inductive coil for transfer of information integrated therein. A power supply is located at least partly on the IC card for providing power to the IC chip of the IC card.
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Citations
21 Claims
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1. In a system for nonconduct transfer of information between an IC card and a card reader/writer, the improvement comprising:
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a first integrated circuit chip on the IC card, said first chip comprising a card logic circuit for controlling the operation of said card, card information transfer means on the integrated circuit chip including at least a first electromagnetically inductive coil for effecting electromagnetic transfer of information and means for coupling said first coil to said card logic circuit, said first coil having multiple spiral windings with at least the innermost of said windings enclosing an area on the chip which is smaller than the area occupied by the logic circuit; a second integrated circuit chip on the reader/writer, said second chip comprising reader/writer information transfer means having at least a second electromagnetically inductive coil for effecting electromagnetic transfer of information to and from said first coil of said IC card; and supply means located at least partly on said IC card for providing power to said first integrated circuit chip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. In a system for noncontact transfer of information between an IC card and a card reader/writer, the improvement comprising:
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a first integrated circuit chip on the IC card, said first chip comprising a card logic circuit for controlling the operation of said card, card information transfer means on the first integrated circuit chip including a first electromagnetically inductive coil for effecting electromagnetic transfer of information, a second electromagnetically inductive coil and means for coupling said coils to said card logic circuit, each of said first and second coils having multiple spiral windings with at least the innermost of said windings enclosing an area which is smaller than the rear occupied by the logic circuit; and a second integrated circuit chip on the reader/writer, said second chip comprising reader/writer information transfer means including a third electromagnetically inductive coil for effecting electromagnetic transfer of information to and from said first coil of said IC card and a fourth electromagnetically inductive coil which is configured to effect electromagnetic transfer of energy to said second coil of said IC card.
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16. An IC card for noncontact transfer of information with a card reader/writer, comprising:
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an integrated circuit chip having a logic circuit for controlling the operation of said card, information transfer means on the integrated circuit chip including at least a first electromagnetically inductive coil for effecting electromagnetic transfer of information with said card reader/writer and means for coupling said first coil to said logic circuit, said coil having multiple spiral windings with at least the innermost of said windings enclosing an area on the chip which is smaller than the area occupied by the logic circuit; and supply means located at least partly on said IC card for providing power to said integrated circuit chip. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification