Semiconductor memory device performing self refresh operation

Details Semiconductor memory device performing self refresh operation Semiconductor memory device performing self refresh operation

2008-07-01

2008-07-01

Auduong, Gene N. (Department: 2827)

Static information storage and retrieval

Read/write circuit

Data refresh

C365S189050, C365S233100

Reexamination Certificate

active

11648398

ABSTRACT:
The present invention relates to a semiconductor memory device to execute a refresh operation in such a manner that an entry and an exit of a self refresh mode is carried out. The present invention uses only external clock signals without a clock enable signal or an auto refresh command and therefore it is possible to implement a simple circuit for the self refresh. A semiconductor memory device includes a self refresh enable signal generator for outputting an activated self refresh enable signal when positive and negative external clock signals are in phase and a de-activated self refresh enable signal when the positive and negative external clock signals are out of phase and a self refresh block for performing a self refresh operation in response to the activated self refresh enable signal.

REFERENCES:
patent: 6621352 (2003-09-01), Matsumoto et al.
patent: 6865132 (2005-03-01), Schaefer et al.
patent: 6961278 (2005-11-01), Jeong
patent: 6990032 (2006-01-01), Jang
patent: 7061287 (2006-06-01), Jeon
patent: 7173870 (2007-02-01), Lee
patent: 7212461 (2007-05-01), Kim et al.
patent: 2002/0000581 (2002-01-01), Yamasaki
patent: 2005/0265103 (2005-12-01), Remaklus, Jr. et al.
patent: 2005-216429 (2005-08-01), None
patent: 2006-004558 (2006-01-01), None

Affiliated with

Also associated with

Rating

Semiconductor memory device performing self refresh operation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Semiconductor memory device performing self refresh operation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor memory device performing self refresh operation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3940446