Solid state memory for aircraft flight data recorder systems

  • US 4,644,494 A
  • Filed: 02/06/1984
  • Issued: 02/17/1987
  • Est. Priority Date: 02/06/1984
  • Status: Expired due to Fees
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First Claim
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1. A solid state memory for storing digitally encoded flight data comprising:

  • memory means having a power input terminal for applying an operating potential to said memory means and having a plurality of storage locations that are selectively accessed by supplying a digitally encoded address signal to said memory means, said memory means being responsive to a control signal for storing supplied digitally encoded data at storage locations corresponding to said address signal supplied to said memory means when said operating potential is supplied to said power input terminal and said control signal is supplied to said memory means;

    switch means having an input terminal, an output terminal and a control terminal, said output terminal of said switch means being coupled to said power input terminal of said memory means, said switch means being responsive to a switch control signal for coupling an electrical potential supplied to said input terminal of said switch means to said switch means output terminal only when said switch control signal is supplied to said control terminal of said switch means; and

    memory controller means for supplying said switch control signal to said switch means and for supplying said address signals and said control signal to said memory means, said memory controller means including means for executing an operational sequence wherein said address and control signals are periodically supplied to said memory means and wherein said switch control signal is supplied to said switch means only during periods of time in which said address and control signal is supplied to said memory means.

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