Patent ID: 7078956
Filing Date: 2006-07-18
Classification: H02M

Abstract:
1. A charge pump circuit comprising: a supply power source; a first unit charge pump, supplied with an operating voltage from said supply power source, operating to perform a pumping operation according to clock signals; a second unit charge pump, supplied with an operating voltage from said supply power source, operating to perform a pumping operation according to said clock signals; at least one switching circuit electrically connected between said first and second unit charge pumps, operating to selectively transfer an output of said first unit charge pump to an input terminal or output terminal of said second unit charge pump according to control signals; an auxiliary pumping circuit, operating to generate an output signal according to said clock signals; and a level shift circuit coupled between said switching circuit and said auxiliary pumping circuit, wherein said level shift circuit generates said control signals according to said output signal of said auxiliary pumping circuit and another control signal.