Refresh circuit and refresh method in semiconductor memory...

Details Refresh circuit and refresh method in semiconductor memory... Refresh circuit and refresh method in semiconductor memory...

2007-03-30

2010-11-30

Song, Jasmine (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C365S222000, C365S236000, C365S230030, C711S005000

Reexamination Certificate

active

07844773

ABSTRACT:
A refresh method for a semiconductor memory device having more than one bank group is provided. The refresh method may include applying an all-refresh command to one the bank groups, determining if one of the bank groups includes a bank undergoing a refresh operation when the all-refresh command is received, and performing an all-refresh operation based on the determination.

REFERENCES:
patent: 6104648 (2000-08-01), Ooishi
patent: 7082072 (2006-07-01), Dono et al.

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