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:
Feb. 04, 2020
Filed:
Mar. 15, 2018
Western Digital Technologies, Inc., San Jose, CA (US);
Adam Noah Jacobvitz, Mountain View, CA (US);
Gulzar Ahmed Kathawala, Fremont, CA (US);
Kroum Stanimirov Stoev, Pleasanton, CA (US);
Bin Wu, Fremont, CA (US);
WESTERN DIGITAL TECHNOLOGIES, INC., San Jose, CA (US);
Abstract
The present disclosure, in various embodiments, describes technologies and techniques for use by a data storage controller for decoding codewords during an error correction read recovery process. In illustrative examples, an iterative procedure exploits artificial codewords generated using information obtained from a NAND or other non-volatile memory (NVM) in a previous sense operation. That is, procedures are described that use information obtained in one stage of read recovery to facilitate a subsequent stage to reduce the need to perform additional NAND senses. In one example, information obtained from a sense operation performed for an initial hard bit decode is used in subsequent soft bit decodes. Moreover, iterative decoding procedures are provided that progressively increase correction strength. The procedures may alternate between hard and soft reads while using syndrome weight to determine a failed bit code gradient for identifying the sensing voltage for a next hard sense.