Patent ID: 8710908

Claim:
A charge pump having at least one charge pump stage, each charge pump stage comprising: at least one NMOS device having a deep N-well (DNW), wherein a gate of the at least one NMOS device is capable of receiving a different signal from a drain of the at least one NMOS device; at least one capacitor coupled to the at least one NMOS device; a switch coupled between the at least one NMOS device and a ground, wherein a drain of the switch is coupled to a deep N-well of the switch; an input node coupled to the at least one NMOS device; and an output node coupled to the at least one NMOS device, wherein the input node is arranged to receive an input signal, the at least one capacitor is arranged to store electrical charges, the charge pump stage is configured to supply the electrical charges to the output node, and the DNW is arranged to float for a positive pump operation.