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Volatile memory support system

  • US 3,980,935 A
  • Filed: 12/16/1974
  • Issued: 09/14/1976
  • Est. Priority Date: 12/16/1974
  • Status: Expired due to Term
First Claim
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1. A volitile memory support system for use with a volitile memory requiring a maintenance voltage to retain its bistable state and an operating voltage to permit it to alter its bistable state, said support system comprising:

  • a primary power supply capable of providing system-operating voltages including said operating voltage coupled to said volitile memory;

    a secondary power supply capable of providing said maintenance voltage;

    a battery supply capable of providing said memory maintenance voltage; and

    switching means coupled to said secondary power supply, said battery supply and said memory to provide said memory with said maintenance voltage when said operating voltages are not being applied to said memory.

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