Patent ID: 7212066
Filing Date: 2007-05-01
Classification: H02M,H03K

Abstract:
1. A charge pump circuit comprising: a first charge transfer MOS transistor connected with an input terminal; a second charge transfer MOS transistor connected in series with the first charge transfer MOS transistor; a capacitor comprising a first terminal and a second terminal, the first terminal being connected with the first charge transfer MOS transistor and the second charge transfer MOS transistor; a clock driver supplying a clock to the second terminal of the capacitor; a control circuit switching on and off the first charge transfer MOS transistor and the second charge transfer MOS transistor; a first switching circuit that connects a back gate of the first charge transfer MOS transistor with the input terminal or the first terminal of the capacitor; and an output terminal connected with the second charge transfer MOS transistor, wherein the first switching circuit connects the back gate of the first charge transfer MOS transistor with the first terminal of the capacitor when the clock driver supplies the clock and connects the back gate of the first charge transfer MOS transistor with the input terminal when the clock driver supplies no clock.