SRAM-compatible memory device performing refresh operation...

Details SRAM-compatible memory device performing refresh operation... SRAM-compatible memory device performing refresh operation...

2006-04-25

2006-04-25

Nguyen, Van Thu (Department: 2824)

Static information storage and retrieval

Systems using particular element

Flip-flop

C365S149000, C365S222000

Reexamination Certificate

active

07035133

ABSTRACT:
An SRAM-compatible memory device performs a refresh operation with separate fetching and rewriting operation periods.The SRAM-conpatible memory device can be activated by a method of driving the SRAM-compatible memory device. During a first refresh period, the SRAM-compatible memory device performs an operation of fetching data from a DRAM cell to be refreshed. During a second refresh period, the SRAM-compatible memory device performs an operation of rewriting the data fetched during the first refresh period in the refreshed DRAM cell. Accordingly, the length of an assigned refresh period is reduced, and the length of an entire external access period is also reduced.

REFERENCES:
patent: 6028804 (2000-02-01), Leung
patent: 6392958 (2002-05-01), Lee
patent: 6809979 (2004-10-01), Tang
patent: 2002/0067632 (2002-06-01), Batson et al.
patent: 2004/0233758 (2004-11-01), Kim et al.

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