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. 06, 2009
Filed:
Jan. 23, 2008
Tang-kuei Tseng, Jhudong Township, Hsinchu County, TW;
Juing-yi Cheng, Cishan Township, Kaohsiung County, TW;
Ryan Hsin-chin Jiang, Taipei, TW;
Tang-Kuei Tseng, Jhudong Township, Hsinchu County, TW;
Juing-Yi Cheng, Cishan Township, Kaohsiung County, TW;
Ryan Hsin-Chin Jiang, Taipei, TW;
Amazing Microelectronic Corp., Taipei, TW;
Abstract
A charge pump circuit with bipolar output comprises a first set of switch device capable of selectively connecting two terminals of a first transfer capacitor to a voltage source and a ground terminal, respectively, a second set of switch device capable of selectively connecting the two terminals of the first transfer capacitor to a grounded first storage capacitor and the voltage source, respectively, a third set of switch device capable of selectively connecting two terminals of a second transfer capacitor to the first transfer capacitor connected to the voltage source and the ground terminal, respectively, and a fourth set of switch device capable of selectively connecting the two terminals of the second transfer capacitor to a grounded second storage capacitor and the ground terminal, respectively. These four sets of switch devices totally have nine switches, and are collocated with clock signals to be selectively driven by a four-phase signal or a two-phase signal so as to produce bipolar voltages with magnitudes higher than the input voltage and also accomplish the highest conversion efficiency.