Patent ID: 7961016

Claim:
A charge pump, comprising: a first transistor; a second transistor, including a gate electrode, a first electrode and a second electrode, wherein a gate electrode of the first transistor is coupled to the gate electrode of the second transistor, and the gate electrode of the second transistor is coupled to the second electrode of the second transistor; a first selector, coupled between a first electrode of the first transistor and a first supply voltage, for selectively connecting the first transistor to the first supply voltage; a second selector, coupled between a second electrode of the first transistor and a second supply voltage, for selectively connecting the first transistor to the second supply voltage; a third selector, coupled between the second electrode of the first transistor and the second supply voltage, for selectively connecting the second transistor to the second supply voltage; and a selection signal generator, coupled to the first, the second and the third selectors, for generating at least a first selection signal and a second selection signal according to a reference selection signal, utilizing the first selection signal to control the first selector, and utilizing the second selection signal to control the second and the third selectors.