Capacitive digital to analog and analog to digital converters
AssigneeMarvell World Trade Ltd.
InventorSehat Sutardja
Life of this patent
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Abstract
A circuit including an amplifier. The circuit includes N capacitances that include first ends and second ends. The first ends communicate with an input of the amplifier. A first switch is configured to selectively connect the input of the amplifier to a reference potential during a first phase. N switches are configured to connect each of the second ends of the N capacitances to a voltage input, the reference potential and a voltage reference and selectively connect each of the second ends of the N capacitances to one of a voltage input, the reference potential and a voltage reference during a second phase. The first and second phases are non-overlapping.
Claims10
A circuit comprising:
- an amplifier;
- N capacitances that include i) first ends that communicate with an input of the amplifier and ii) second ends;
- a first switch configured to selectively connect the input of the amplifier to a reference potential during a first phase;
- and
- N switches configured to:
- connect each of the second ends of the N capacitances to a voltage input, the reference potential and a voltage reference;
- and
- selectively connect each of the second ends of the N capacitances to one of a voltage input, the reference potential and a voltage reference during a second phase, wherein the first and second phases are non-overlapping.
Dependencies are inferred from the claim text.