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:
May. 09, 2023
Filed:
Apr. 30, 2021
Applicant:
Rambus Inc., San Jose, CA (US);
Inventors:
Ely Tsern, Los Altos, CA (US);
Frederick A Ware, Los Altos Hills, CA (US);
Suresh Rajan, San Jose, CA (US);
Thomas Vogelsang, Mountain View, CA (US);
Assignee:
Rambus Inc., San Jose, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11C 29/00 (2006.01); G11C 29/24 (2006.01); G06F 11/10 (2006.01); G11C 29/50 (2006.01); G11C 5/04 (2006.01); G11C 29/44 (2006.01);
U.S. Cl.
CPC ...
G11C 29/24 (2013.01); G06F 11/1008 (2013.01); G11C 29/50016 (2013.01); G11C 5/04 (2013.01); G11C 2029/4402 (2013.01); G11C 2211/4061 (2013.01);
Abstract
A method of operation in an integrated circuit (IC) memory device is disclosed. The method includes refreshing a first group of storage rows in the IC memory device at a first refresh rate. A retention time for each of the rows is tested. The testing for a given row under test includes refreshing at a second refresh rate that is slower than the first refresh rate. The testing is interruptible based on an access request for data stored in the given row under test.