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Memory package system

  • US 5,128,972 A
  • Filed: 02/22/1990
  • Issued: 07/07/1992
  • Est. Priority Date: 03/22/1989
  • Status: Expired due to Fees
First Claim
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1. A memory package system comprising a read/write unit and a memory module, wherein bidirectional transmission of write data and read data is effected between said memory module and said read/write unit via electromagnetic induction coupling,said read/write unit comprising:

  • (a) a first electromagnetic induction coupling device which includes a transmitting coil and a receiving coil coaxially wound around a single core;

    (b) down modulating means for modulating down transmission data which is to be transmitted to the memory module and for applying thus modulated down transmission data to said transmitting coil of said first electromagnetic induction coupling device; and

    (c) up demodulating means for demodulating as up reception data a signal induced in said receiving coil of said first electromagnetic induction coupling device,said memory module comprising;

    (a) a non-volatile memory;

    (b) a second electromagnetic induction coupling device which includes a single transmitting/receiving coil which is commonly used in both a receiving mode and a transmitting mode wound around a single magnetic core;

    (c) down demodulating means for demodulating as down reception data a signal induced in said transmitting/receiving coil during the receiving mode;

    (d) memory control means for writing and reading data into and from said non-volatile memory on the basis of the down reception data demodulated by said down demodulating means;

    (e) power supply means for rectifying the down signal induced in said transmitting/receiving coil and for forming and operating power source of said memory module;

    (f) up modulating mean for modulating read data which has been read out of said non-volatile memory by said memory control means;

    (g) coil switching means, response to said memory control means, for supplying an output of said up modulating means to said transmitting/receiving coil only during the transmitting mode in which up transmission data is transmitted to said read/write unit; and

    (h) a backup capacitor for charging an output voltage of said power supply means and for supplying a power source when data is transmitted from said memory module to said read/write unit.

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