Patent ID: 8395438

Claim:
An on-chip voltage conversion apparatus for integrated circuits, comprising: a first capacitor; a first NFET device configured to selectively couple a first electrode of the first capacitor to a low side voltage rail of a first voltage domain; a first PFET device configured to selectively couple the first electrode of the first capacitor to a high side voltage rail of the first voltage domain; a second NFET device configured to selectively couple a second electrode of the first capacitor to a low side voltage rail of a second voltage domain, wherein the low side voltage rail of the second voltage domain corresponds to the high side voltage rail of the first voltage domain; and a second PFET device configured to selectively couple the second electrode of the first capacitor to a high side voltage rail of the second voltage domain; wherein actuating signals for the first NFET device and first PFET device are decoupled from one another such that the actuating signal for the first NFET device begins to transition from low to high after the actuating signal for the first PFET device begins to transition from low to high, and the actuating signal for the first PFET device begins to transition from high to low after he actuating signal for the first NFET device begins to transition from high to low; and wherein actuating signals for the first NFET device and second PFET device are decoupled from one another such that the actuating signal for the second NFET device begins to transition from low to high after the actuating signal for the second PFET device begins to transition from low to high, and the actuating signal for the second PFET device begins to transition from high to low after he actuating signal for the second NFET device begins to transition from high to low.