Patent ID: 6853566

Claim:
A charge pump circuit for boosting an input voltage applied to a positive power supply input terminal and outputting the boosted voltage from an output terminal, said charge pump circuit comprising: a plurality of first capacitors each charged with said input voltage; a plurality of first switching elements each for connecting a low potential side of a corresponding one of said first capacitors to said positive power supply input terminal when said corresponding first capacitor is charged; a plurality of second switching elements each for connecting a high potential side of the corresponding one of said first capacitors to said output terminal when said corresponding first capacitor is charged; a plurality of third switching elements each connected to a corresponding one of said first capacitors in series; a fourth switching element for connecting one end of a series circuit of each said corresponding one of said first capacitors and said plurality of third switching elements to said positive power supply input terminal; a fifth switching element for connecting the other end of the series circuit of each said corresponding one of said first capacitors and said plurality of third switching elements to a negative power supply input terminal; a second capacitor charged with a voltage generated by charging said plurality of first capacitors; and a control circuit for controlling each of said first switching elements, each of said second switching elements, each of said third switching element, said fourth switching element and said fifth switching element in response to a predetermined clock signal.