Static information storage and retrieval – Read/write circuit – Data refresh
Reexamination Certificate
2006-06-23
2008-09-09
Elms, Richard (Department: 2824)
Static information storage and retrieval
Read/write circuit
Data refresh
C365S145000, C365S149000, C365S233100, C365S233110, C365S233120, C711S106000
Reexamination Certificate
active
07423925
ABSTRACT:
A memory capable of performing a refresh operation uncompetitively with an internal access operation also when an external access operation is non-cyclically performed is obtained. This memory comprises an external access detection portion detecting an external access operation, an access control portion performing an internal access operation on the basis of the external access operation and a refresh determination portion determining whether or not to perform a refresh operation on the basis of detection of the external access operation by the external access detection portion and the operating state of the access control portion. The access control portion performs the refresh operation before or after the internal access operation on the basis of the result of determination of the refresh determination portion.
REFERENCES:
patent: 4933907 (1990-06-01), Kumanoya et al.
patent: 5155705 (1992-10-01), Goto et al.
patent: 6285626 (2001-09-01), Mizuno et al.
patent: 6421292 (2002-07-01), Kitamoto et al.
patent: 6469948 (2002-10-01), Mizuno et al.
patent: 6501699 (2002-12-01), Mizugaki
patent: 6597615 (2003-07-01), Mizugaki
patent: 6665231 (2003-12-01), Mizuno et al.
patent: 6885593 (2005-04-01), Mizuno et al.
patent: 7362642 (2008-04-01), Miyamoto et al.
patent: 2007/0183242 (2007-08-01), Miyamoto
patent: 07-073682 (1995-03-01), None
patent: 2001-229674 (2001-08-01), None
Elms Richard
McDermott Will & Emery LLP
Sanyo Electric Co,. Ltd.
Wendler Eric
LandOfFree
Memory does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Memory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Memory will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3987625