Patent ID: 7157961

Claim:
A charge pump comprising: a plurality of stages including at least a first stage and a last stage, each of the stages comprising a first transistor having a first source terminal, a first drain terminal, a first gate terminal and a first body terminal; a second transistor having a second source terminal, a second drain terminal, a second gate terminal, and a second body terminal; wherein each transistor of each stage, except for the second transistor of the last stage, has its source and drain terminals connected to each other and to a body terminal of a next transistor; wherein the first transistor of each stage has a first gate terminal connected to an alternating polarity voltage source and the second transistor of each stage has a second gate terminal connected to ground; and wherein the first transistor of the first stage has a first body terminal connected to ground; and the second transistor of the last stage has a second source terminal and a second drain terminal connected to an output terminal of the charge pump.