Patent ID: 8710909
Filing Date: 2014-04-29
Classification: G11C,H02M

Abstract:
1. A charge pump circuit to generate an output voltage, including: an output generation section having a first leg receiving a first clock signal and providing a first output and a second leg receiving a second clock signal and providing a second output, wherein the first and second clock signals are non-overlapping; first and second output transistors, wherein the first and second outputs of the first and second legs of the output generation section are respectively connected through the first and second output transistors to provide the output voltage; an offset cancellation section having a first leg providing a first offset cancellation output and a second leg having a second offset cancellation output, where the first and second offset cancellation outputs of the output generation section are respectively connected to the control gate of the first and second output transistors, wherein when the first and second offset cancellation outputs are high the first and second outputs of the output generation section are respectively high, and wherein when the first and second outputs of the output generation section are low the first and second offset cancellation outputs are respectively low; and first and second shorting transistors, the first shorting transistor being connected between the first output of the output generation section and the control gate of the first output transistor and having a gate connected to the gate of the second output transistor, and the second shorting transistor connected between the second output of the output generation section and the control gate of the second output transistor and having a gate connected to the gate of the first output transistor.