Semiconductor memory device changing refresh interval...

Details Semiconductor memory device changing refresh interval... Semiconductor memory device changing refresh interval...

2007-03-27

2007-03-27

Zarabian, Amir (Department: 2827)

Static information storage and retrieval

Read/write circuit

Differential sensing

C365S222000

Reexamination Certificate

active

11085148

ABSTRACT:
A semiconductor memory device includes a memory core circuit having memory cells for storing data, a circuit configured to refresh the memory core circuit at a refresh interval, a temperature detecting unit configured to detect temperature, and a control circuit configured to shorten the refresh interval immediately in response to detection of a predetermined temperature rise by the temperature detecting unit and to elongate the refresh interval after refreshing every one of the memory cells at least once in response to detection of a temperature drop by the temperature detecting unit.

REFERENCES:
patent: 5532968 (1996-07-01), Lee
patent: 5784328 (1998-07-01), Irrinki et al.
patent: 6731558 (2004-05-01), Yamauchi et al.
patent: 01116994 (1989-05-01), None
patent: 07296582 (1995-11-01), None

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