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Information medium

  • US 4,641,374 A
  • Filed: 08/10/1984
  • Issued: 02/03/1987
  • Est. Priority Date: 08/08/1984
  • Status: Expired due to Term
First Claim
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1. An information medium used for receiving/delivering information from/to an exterior device, comprising:

  • receiver means for receiving a modulated input signal from the exterior device;

    demodulator means coupled to said receiver means for demodulating said modulated input signal to provide specific information which is formed of a binary signal having a given bit pattern;

    decoder means coupled to said demodulator means for decoding said specific information to provide a decoded instruction corresponding to whatever binary signal is provided by said demodulator;

    memory means for storing given data;

    control means coupled to said decoder means and memory means, for controlling a write or read operation of said memory means in accordance with the contents of said decoded instruction;

    battery means for generating electric power; and

    switch means coupled to said decoder means and battery means, for selectively activating any of said receiver means, demodulator means, memory means and control means by said electric power;

    the selection of said switch means for the power supply depending on the contents of said specific information.

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