Backup power system for dynamic memory

Details Backup power system for dynamic memory Backup power system for dynamic memory

1988-05-26

1989-11-28

Fears, Terrell W.

Static information storage and retrieval

Powering

Data preservation

371 66, G11C 1140

Patent

active

048842427

ABSTRACT:
A power supply system for a dynamic memory includes a main power supply, a backup power supply and a power down detection circuit which are all connected in parallel across the input of a DC/DC converter. In turn the DC/DC converter supplies regulated power to the dynamic memory. On interruption of the main power supply, the backup supply provides input power to the DC/DC converter only as long as the power sensed by the power down detection circuit is adequate for the DC/DC converter to maintain a bit pattern stored in the dynamic memory. On sensing inadequate input power to the DC/DC converter the backup supply is automatically disconnected.

REFERENCES:
patent: 4777626 (1988-10-01), Matsushita et al.
patent: 4823019 (1989-04-01), Gronskog et al.

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