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:
Feb. 23, 2010
Filed:
Mar. 03, 2008
Kwan-jen Chu, HsinChu, TW;
Shui-mu Lin, Taichung County, TW;
Jien-sheng Chen, Toufen Town, TW;
Tsung-wei Huang, Taipei, TW;
Kwan-Jen Chu, HsinChu, TW;
Shui-Mu Lin, Taichung County, TW;
Jien-Sheng Chen, Toufen Town, TW;
Tsung-Wei Huang, Taipei, TW;
Richtek Technology Corporation, Hsin-Chu, TW;
Abstract
The present invention discloses a charge pump down circuit which comprises three capacitors operating in three time phases. In the first time phase, the total of the voltages across the three capacitors is equal to an input voltage; in the second time phase, the voltage across the second capacitor is equal to the voltage across the third capacitor; in the third time phase, the difference between the voltages across the first and the second capacitors is equal to the voltage across the third capacitor, wherein the voltage across the third capacitor is the output voltage of the charge pump down circuit.