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. 20, 2010
Filed:
Jan. 15, 2008
Chin-ghee Ch'ng, Gelugor, MY;
Kuan-cheng Tang, Penang, MY;
Chin-Ghee Ch'ng, Gelugor, MY;
Kuan-Cheng Tang, Penang, MY;
Spansion LLC, Sunnyvale, CA (US);
Abstract
Systems and methods for improving efficiency of a voltage booster for read mode operations of memory cells and discharging a boosted supply voltage safely are disclosed. The system contains a plurality of boosting stages coupled in series including a plurality of boosting capacitors, a plurality of isolators. The isolator can be used to prevent boosting of one capacitor from negatively affecting a charge of the other adjacent capacitor to improve the efficiency of the voltage booster. A voltage booster circuit can accurately boost a supply voltage with a suitable number of boosting stages depending on a level of the supply voltage being provided. Since boosters contain a suitable number of boosting stages, the boosters can discharge a boosted voltage sequentially. With this sequential discharge method, memory cells can not have a hot switching problem.