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Patent Searching and Data


Title:
REFRESH METHOD FOR SEMICONDUCTOR MEMORY DEVICE
Document Type and Number:
Japanese Patent JP2002358779
Kind Code:
A
Abstract:

To provide a refreshing method for a semiconductor memory device, which can perform normally a refreshing operation while shortening a memory cell access time.

This method comprises a step (2) for latching a row address for refreshing at the time when refresh request is generated, a step (3) for judging whether a normal operation instruction is inputted from the outside, a step (4) for comparing a block selection bit of a row address for normal operation at the time, with a block selection bit of the latched row address for refreshing, when a normal operation instruction is inputted, and a step (5) for decoding the latched row address for refreshing and activating a word line for refreshing only when the block selection bit of the row address for normal operation is different from the block selection bit of the row address for refreshing in consequence of comparison.


Inventors:
JO SEONG-KUE
PARK JONG-YUL
Application Number:
JP2002088557A
Publication Date:
December 13, 2002
Filing Date:
March 27, 2002
Export Citation:
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Assignee:
SAMSUNG ELECTRONICS CO LTD
International Classes:
G11C11/407; G11C11/406; (IPC1-7): G11C11/406
Attorney, Agent or Firm:
Yasunori Otsuka (3 others)