초록 ▼

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 sup

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.

대표청구항 ▼

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 t

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.