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. 08, 2020
Filed:
Feb. 26, 2019
Toshiba Memory Corporation, Tokyo, JP;
Koji Horisaki, Yokohama Kanagawa, JP;
Toshiba Memory Corporation, Tokyo, JP;
Abstract
A memory system includes a nonvolatile memory and a memory controller. The memory controller determines a read voltage for first data encoded by a first encoding scheme, by generating a first histogram indicating the number of memory cells for each threshold voltage, and estimating the read voltage using: (a) the first histogram that is corrected based on a first parameter of the first encoding scheme, and a second parameter of a second encoding scheme, and an estimation function for estimating a read voltage for second data encoded by the second encoding scheme, or (b) the uncorrected first histogram, and the estimation function that is corrected based on the first and second parameters, or (c) the first histogram after partial correction based on the first and second parameters, and the estimation function after partial correction based on the first and second parameters.