Patent ID: 6888400

Claim:
A charge pump circuit comprising a plurality of driving units cascaded in series, each driving unit comprising: an input port; an output port; a first node; a second node; a first capacitor electrically connected to the first node; a second capacitor electrically connected to the output port; a first transistor comprising: a substrate electrically connected to the second node; a gate electrically connected to the output port; a drain electrically connected to the input port; and a source electrically connected to the first node; a second transistor comprising: a substrate electrically connected to the second node; a gate electrically connected to the first node; a drain electrically connected to the input port; and a source electrically connected to the output port; a third transistor comprising: a substrate electrically connected to a first predetermined voltage; a gate; a source electrically connected to the second node; and a drain electrically connected to the output port; and a fourth transistor comprising: a substrate electrically connected to a second predetermined voltage; a gate; a source electrically connected to the second node; and a drain electrically connected to the input port; wherein the gate of the fourth transistor within one driving unit is electrically connected to the gate of the third transistor within previous adjacent driving unit.