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. 13, 2004
Filed:
Jan. 09, 2003
Applicant:
Inventor:
Kanji Natori, Tokyo, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 7/00 ;
U.S. Cl.
CPC ...
G11C 7/00 ;
Abstract
A booster circuit for a non-volatile semiconductor memory device has a drive control circuit. At a power supply ON time or at a reset time, in response to an externally input power supply ON/reset signal ON/RS, the drive control circuit does not drive a weak charge pump but drives a strong charge pump, which has a greater current capacity than that of the weak charge pump, even in a standby mode. This arrangement enables a boosted voltage HV to quickly rise from 0 V to a standby voltage, thus desirably shortening an initial access permission time at the power supply ON time or at the reset time.