Power backup system for volatile memory

G - Physics – 11 – C

Patent

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G11C 5/14 (2006.01)

Patent

CA 2200982

In a preservation system (170) for a volatile memory (171a-174a) associated with a nonvolatile memory (171b-174b), 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 interruption 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 of the preservation system is an environment with vibration and/or power switching transients that affects the supply of power, such as an aircraft.

Dans un système de conservation (170) destiné à une mémoire non rémanente (172) associée à une mémoire rémanente (171), une partie de stockage d'énergie accumule de l'énergie pendant l'alimentation en régime normal. Lorsqu'une panne d'alimentation se produit, l'énergie stockée est fournie à la mémoire non rémanente. Une énergie de secours suffisante est stockée pour permettre de compenser la majorité des interruptions accidentelles d'alimentation. Ensuite, après suppression de l'alimentation extérieure, lorsque l'alimentation de secours diminue jusqu'à atteindre une quantité prédéterminée, les données se trouvant dans la mémoire non rémanente sont transférées vers la mémoire rémanente. L'utilisation préférée du système de conservation s'inscrit dans un environnement à vibrations et/ou phénomènes transitoires de commutation d'alimentation affectant l'alimentation en énergie, tel qu'un avion.

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