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:
Oct. 17, 2006
Filed:
Sep. 23, 2004
Liang-hsiang Chiu, Taoyuan Hsien, TW;
Wu-chang Chang, Peipu Hsiang, TW;
Liang-Hsiang Chiu, Taoyuan Hsien, TW;
Wu-Chang Chang, Peipu Hsiang, TW;
Ememory Technology Inc., Hsinchu, TW;
Abstract
A charge pump circuit has an input stage, an output stage and multiple boosting stages coupled between the input stage and the output stage. The boosting stages are driven by four phase clock signals. Each boosting stage has two branch charge pumps, wherein each branch charge pump at least has a main pass transistor, a pre-charge transistor, two substrate transistors and capacitors. The substrate transistors and the main pass transistor are operated in association with the four phase clock signals to keep a potential of the body of the main pass transistors at a low level thus mitigating the body effect.