The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 08, 2016
Filed:
Jul. 09, 2013
Semiconductor memory device that controls refresh period, memory system and operating method thereof
Applicants:
Jung-sik Kim, Seoul, KR;
Cheol Kim, Seoul, KR;
Sang-ho Shin, Yongin-si, KR;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 11/40 (2006.01); G11C 11/406 (2006.01); G11C 7/00 (2006.01); G11C 11/402 (2006.01); G11C 11/408 (2006.01);
U.S. Cl.
CPC ...
G11C 11/406 (2013.01); G11C 7/00 (2013.01); G11C 11/402 (2013.01); G11C 11/408 (2013.01); G11C 11/40603 (2013.01); G11C 11/40622 (2013.01); G11C 2211/406 (2013.01);
Abstract
A semiconductor memory device includes a cell array and a refresh controller coupled to the cell array. The refresh controller is configured to insert at least one insertion refresh address in a first refresh address sequence based on address information about the cell array to generate a second refresh address sequence and to apply the second refresh address sequence to the cell array, such that selected cells may be refreshed more frequently without increasing an overall refresh rate.