Preservation system for volatile memory with nonvolatile backup

Details Preservation system for volatile memory with nonvolatile backup Preservation system for volatile memory with nonvolatile backup

1994-09-28

1996-05-21

Fears, Terrell W.

Static information storage and retrieval

Powering

Data preservation

365226, G11C 1300

Patent

active

055196632

ABSTRACT:
In a preservation system for a volatile memory associated with a nonvolatile memory, an energy storage portion accumulates energy while power is provided normally. When a power outage occurs, the stored energy is supplied to the volatile memory. Enough backup power is stored to accommodate the vast majority of unintentional interruptions of power. Eventually, after removal of external power, when the backup power decreases to a predetermined amount, data in the volatile memory is transferred to the nonvolatile memory. The preferred use for the preservation system is in an environment with vibration and/or power switching transients that affect the supply of power, such as an aircraft.

REFERENCES:
patent: 4800533 (1989-01-01), Arakawa
patent: 4943961 (1990-07-01), Sparks
patent: 4959774 (1990-09-01), Davis
patent: 5003192 (1991-03-01), Beigel
patent: 5204840 (1993-04-01), Mazur
patent: 5390322 (1995-02-01), O'Brien et al.
"nvSram an Alternative to EEPROMS"-Military & Aerospace Electronics Mar. 28, 1994, p. 81.

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