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:
Sep. 15, 2015
Filed:
Mar. 11, 2013
Applicant:
Seagate Technology Llc, Cupertino, CA (US);
Inventors:
Mai A. Ghaly, Bloomington, MN (US);
Bruce Douglas Emo, Longmont, CO (US);
Assignee:
SEAGATE TECHNOLOGY LLC, Cupertino, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 11/00 (2006.01); G06F 11/10 (2006.01); G01R 31/317 (2006.01); G11C 16/34 (2006.01); G11C 7/14 (2006.01); G11C 29/02 (2006.01);
U.S. Cl.
CPC ...
G06F 11/1008 (2013.01); G01R 31/3171 (2013.01); G06F 11/1048 (2013.01); G11C 7/14 (2013.01); G11C 16/3404 (2013.01); G11C 29/021 (2013.01); G11C 29/028 (2013.01);
Abstract
An adaptive search scheme leads to threshold voltages that have lower bit error rates over initial values. An initial reference voltage is used and data is measured for set steps in voltage about the initial value sufficient to fit a polynomial curve. A minimum is used to determine the lowest bit error rate and corresponding optimum threshold voltage. This voltage is adopted as the new threshold voltage for reading the given data.