Multiple-phase, differential sampling and steering
First Claim
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1. A system, comprising:
- a differential input circuit including first and second differential output nodes;
first and second differential output circuits each including first and second differential input nodes; and
a differential steering circuit, including first and second control nodes to receive first and second control signals, to steer a differential signal from the first and second differential output nodes of the differential input circuit to the first and second differential input nodes of the first differential output circuit in response to the first control signal and to the first and second differential input nodes of the second differential output circuit in response to the second control signal.
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Abstract
Methods and systems to controllably steer multiple phases of a differential signal, including to generate a differential current in response to a differential voltage, to controllably steer the differential current between multiple output circuits in response to corresponding control signals, which may be out of phase with respect to one another, and to generate multiple corresponding outputs corresponding to the multiple steered phases of the current. A differential input circuit and a current steering circuit may be common to multiple output circuits, and a common offset compensation may be provided to compensate for a substantial portion of offset associated with the multiple outputs.
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Citations
20 Claims
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1. A system, comprising:
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a differential input circuit including first and second differential output nodes; first and second differential output circuits each including first and second differential input nodes; and a differential steering circuit, including first and second control nodes to receive first and second control signals, to steer a differential signal from the first and second differential output nodes of the differential input circuit to the first and second differential input nodes of the first differential output circuit in response to the first control signal and to the first and second differential input nodes of the second differential output circuit in response to the second control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method, comprising:
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generating a differential current in response to a differential input voltage, wherein the differential current includes first and second portions that are substantially out of phase with one another; controllably steering the first and second portions of the differential current to a first differential output circuit in response to a first control signal and to a second differential output circuit in response to a second control signal; generating first and second differential output voltages at the corresponding first and second differential output circuits, each of the first and second differential output voltages including first and second portions that are substantially out of phase with one another. - View Dependent Claims (15, 16, 17, 18)
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19. A system, comprising:
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a differential input circuit to apportion a relatively fixed current amongst first and second differential output nodes in response to a differential input voltage; first and second differential output circuits each including first and second differential input nodes; and a differential sample and steer circuit to sample the differential current at the first and second differential output nodes of the differential input circuit, and to steer corresponding current samples to the first and second differential input nodes of the first differential output circuit in response to a first control signal, and to the first and second differential input nodes of the second differential output circuit in response to a second control signal. - View Dependent Claims (20)
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Specification