Semiconductor memory device changing refresh interval...

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

2007-03-02

2008-11-18

Hoang, Huan (Department: 2827)

Static information storage and retrieval

Read/write circuit

Data refresh

C365S211000, C365S191000

Reexamination Certificate

active

07453754

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.

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patent: 6446159 (2002-09-01), Kai et al.
patent: 6667925 (2003-12-01), Kobayashi et al.
patent: 01-116994 (1989-05-01), None
patent: 07-296582 (1995-11-01), None

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