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Personal medical IC card and read/write unit

  • US 5,451,763 A
  • Filed: 07/05/1994
  • Issued: 09/19/1995
  • Est. Priority Date: 07/05/1994
  • Status: Expired due to Term
First Claim
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1. An IC card system, comprising:

  • an IC card, having;

    a rigid substrate having a top side, a bottom side and a periphery,electrical components disposed on said top side of said substrate,a coil form disposed about said periphery of said substrate,a card coil wound about said coil form,first and a second card capacitive plates disposed on said bottom side of said substrate,power circuitry for receiving inductive power from said coil and generating a regulated power supply voltage for powering said electrical components,I/O circuitry for capacitively coupling data via said first and second card capacitor plates, anda cover for covering said electrical components on said top side of said substrate; and

    an IC card Read/Write unit, having;

    a receptacle shaped similar to said substrate such that said card coil is disposed within said receptacle once said card is disposed within said Read/Write unit,a Read/Write unit coil disposed in the lateral sides of said receptacle such that said Read/Write unit coil is proximate to said card coil when said card is disposed within said receptacle of said Read/Write unit,driving circuitry for driving said Read/Write unit coil to provide inductive power to said card through said card coil,a first and a second Read/Write unit capacitor plate disposed such that when said card is disposed within said receptacle, said first card capacitor plate is proximate to said first Read/Write unit capacitor plate and said second card capacitor plate is proximate to said second Read/Write unit capacitor plate, andRead/Write circuitry for capacitively coupling data via said first and second Read/Write unit capacitor plates.

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