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:
Jun. 19, 2012
Filed:
Sep. 03, 2010
Koichi Fukuda, Yokohama, JP;
Makoto Iwai, Chigasaki, JP;
Koichi Fukuda, Yokohama, JP;
Makoto Iwai, Chigasaki, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A non-volatile semiconductor storage device according to one aspect of the present invention includes a plurality of sense amplifier circuit that are configured to carry out a plurality of read cycles on a plurality of bit lines connected to those memory cells that are selected by a selected one of the word lines. During the second and subsequent read cycles, supply of a read current is ceased to those bit lines when it is determined in the preceding read cycle that a current not less than a certain determination current level flows therethrough, and the read current is supplied only to the remaining bit lines. A setup time of the bit lines in the first read cycle is set shorter than a setup time of the bit lines in the second and subsequent read cycles.