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. 19, 2024
Filed:
Jul. 22, 2022
SK Hynix Inc., Icheon-si, KR;
Kyung Mook Kim, Icheon-si, KR;
SK hynix Inc., Icheon-si, KR;
Abstract
A semiconductor memory device includes a refresh counter generating a counting address that is sequentially increasing according to a refresh command; an active latch generating an active address corresponding to an input address according to an active command; and a refresh control circuit repeatedly performing a first refresh period and a second refresh period according to the refresh command, and controlling selective refresh of one or more word lines corresponding to the counting address selected based on one or more high bits of the active address during the first refresh period and controlling sequential refresh of the word lines corresponding to the counting address during the second refresh period.