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:
Jul. 21, 2009
Filed:
Oct. 24, 2007
Kazuhiko Sato, Yokohama, JP;
Hidetoshi Saito, Yamato, JP;
Kiyotaka Uchigane, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A semiconductor memory device includes a memory cell array, word lines each of which connects the control gates of the memory cells on the same row together in the memory cell array, a row decoder which selects a word line, and applies a voltage to the selected word line, and a voltage generator which generates a boosted voltage, and outputs the boosted voltage as the voltage, the voltage generator includes a comparator which compares a first voltage with a second voltage, and outputs a comparison result signal, a constant current circuit which generates a first control signal in accordance with the comparison result signal, a first delay circuit which generates a second control signal by delaying the comparison result signal, and a charge pump circuit which generates the boosted voltage in response to the first and second control signals.