Switched capacitor voltage converters
First Claim
1. 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.
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Abstract
An on-chip voltage conversion apparatus for integrated circuits includes 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.
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Citations
17 Claims
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1. An on-chip voltage conversion apparatus for integrated circuits, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An on-chip voltage conversion system for integrated circuits, comprising:
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a clock source having a plurality of clock phases; a plurality of actuating signals corresponding to one of a plurality of phases; and a plurality of voltage converters controlled by the actuating signals, with each voltage converter 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.
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12. A method of implementing on-chip voltage conversion for integrated circuits, the method comprising:
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using a first NFET device to selectively couple a first electrode of a first capacitor to a low side voltage rail of a first voltage domain; using a first PFET device to selectively couple the first electrode of the first capacitor to a high side voltage rail of the first voltage domain; using a second NFET device 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 using a second PFET device 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. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification