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. 05, 2010
Filed:
Jul. 26, 2007
Chung-kuang Chen, Taipei, TW;
Chun-hsiung Hung, Hsinchu, TW;
Yi-te Shih, Hsinchu, TW;
Macronix International Co., Ltd., Hsinchu, TW;
Abstract
A multiple-stage charge pump circuit includes first and second pump capacitors, a charge recycle circuit, and first and second transfer circuits. The charge recycle circuit includes first and second driving circuits and a switch circuit turning off to make a node floating and to couple first terminals of the first and second pump capacitors to the node in a first time period. The switch circuit and first and second driving circuits provide a specific voltage to the node and control voltages at the first terminals of the first and second pump capacitors in second and third time periods, respectively. The first and second transfer circuits provide a high voltage to a second terminal of the first pump capacitor in the second time period, and provide the voltage of the second terminal of the first pump capacitor to a second terminal of the second pump capacitor in the third time period.