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:
Oct. 27, 2020
Filed:
Apr. 30, 2019
Applicant:
SK Hynix Inc., Icheon-si, Gyeonggi-do, KR;
Inventor:
No Geun Joo, Icheon-si, KR;
Assignee:
SK hynix Inc., Icheon-si, Gyeonggi-do, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 7/00 (2006.01); G11C 11/406 (2006.01); G11C 11/408 (2006.01);
U.S. Cl.
CPC ...
G11C 11/40618 (2013.01); G11C 11/4087 (2013.01);
Abstract
A semiconductor memory apparatus includes a plurality of memory banks and a refresh control circuit. The refresh control circuit, in each plurality of cycles, performs a refresh operation on at least one memory bank of the plurality of memory banks at a first refresh rate, and performs a refresh operation on the other memory banks of the plurality of memory banks at a second refresh rate. The refresh control circuit circulates the at least one memory bank on which the refresh operation is performed at the first refresh rate in each one or more cycles of the plurality of cycles.