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. 16, 2013
Filed:
Mar. 30, 2012
Wei-hsin Wei, Hsinchu County, TW;
Jwin-yen Guo, Hsinchu County, TW;
Teng-hung Chang, Kaohsiung, TW;
Ming-jun Hsiao, Hsinchu County, TW;
Wei-Hsin Wei, Hsinchu County, TW;
Jwin-Yen Guo, Hsinchu County, TW;
Teng-Hung Chang, Kaohsiung, TW;
Ming-Jun Hsiao, Hsinchu County, TW;
Richtek Technology Corp., Chupei, Hsinchu, TW;
Abstract
A dual mode charge pump is operable in a first mode or a second mode for providing positive and negative output voltages that can be stabilized by adjusting the charging time of two terminals of a flying capacitor or by adjusting the charging/discharging time of the positive and negative voltage output terminals. The dual mode charge pump can apply to a much wider input supply voltage range with less numbers of power switches, thus requiring less die area and lower costs. Moreover, the dual mode charge pump can precisely define a common mode voltage, thus making the common voltage drift smaller and less load dependent, especially when the output supply voltages are under different load conditions.