Patent ID: 7990205

Claim:
A charge pump for use in a semiconductor integrated circuit, comprising: a supply voltage input terminal that receives a supply voltage; a pulse generating unit that receives an input clock and generates first and second non-overlapping pulses in response to the input clock, and that generates first and second variable amplitude pulses that correspond to the first and second non-overlapping pulses, respectively; a first switching variable resistance unit that controls a current flowing into the supply voltage input terminal in response to the first variable amplitude pulse; a second switching variable resistance unit that controls the current flowing into the supply voltage input terminal in response to the second variable amplitude pulse; a first capacitor coupled between output terminals of the first and second switching variable resistance units; a first switching unit coupled between an output terminal of the second switching variable resistance unit and a ground, and responding to the first non-overlapping pulse; a second switching unit coupled between an output terminal of the first switching variable resistance unit and a load output terminal, and responding to the second non-overlapping pulse; and a second capacitor coupled between the load output terminal and the ground.