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, 2020
Filed:
Sep. 10, 2019
Toshiba Memory Corporation, Minato-ku, JP;
Shohei Asami, Fujisawa, JP;
Toshikatsu Hida, Yokohama, JP;
Toshiba Memory Corporation, Minato-ku, JP;
Abstract
A memory system includes a semiconductor memory including memory cells and a memory controller configured to perform a first tracking process to determine a first voltage, and to read data using the first voltage in a read process after the first tracking process. In the first tracking process, the memory controller is configured to read only first, second, and third data respectively using a second, third, and fourth voltage, determine a number of first memory cells based on the first and second data, determine a number of second memory cells based on the second and third data, and determine the first voltage, based on the number of first and second memory cells.