Patent ID: 7714636

Claim:
A charge pump cell with an input and output nodes, comprising: a first equalization unit, for equalizing charges of an input and output of the first equalization unit, the input of the first equalization unit is coupled to the input node; a second equalization unit, for equalizing charges of an input and output of the second equalization unit, the input of the second equalization unit is coupled to the input node, and the output of the second equalization unit is coupled to the output node; a third equalization unit, for equalizing charges of an input and output of the third equalization unit, the input of the third equalization unit is coupled to the input node; a first capacitor, one end of the first capacitor is coupled to control ends of the second and third equalization units for enabling or disabling the second and third equalization units, and coupled to the output of the first equalization unit, another end of the first capacitor is coupled to a fourth clock signal, a second capacitor, one end of the second capacitor is coupled to a control end of the first equalization unit for enabling or disabling the first equalization unit, and coupled to the output of the third equalization unit, another end of the second capacitor is coupled to a first clock signal; and a third capacitor, one end of the second capacitor is coupled to the output of the second equalization unit, another end of the third capacitor is coupled to the first clock signal.