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US 11,677,408 B2Granted
Combined I/Q digital-to-analog converter
AssigneeQUALCOMM Incorporated
InventorsPeter Shah, Matthew Sienko
Life of this patent
Estimating the term…
Abstract
A combined I/Q DAC is provided with a plurality of sources corresponding to a plurality of selectors in which the corresponding source drives the corresponding selector with a source signal to produce a corresponding pair of in-phase and quadrature-phase analog input signals to a summation network. Each selector routes its source signal responsive to a digital value of a corresponding in-phase and quadrature-phase bit pair.
Claims29
A combined in-phase and quadrature-phase digital-to-analog converter comprising:
- a plurality of selectors corresponding to a plurality of in-phase and quadrature-phase bit pairs, each selector being configured to receive a corresponding in-phase and quadrature-phase bit pair from the plurality of in-phase and quadrature-phase bit pairs;
- a plurality of sources corresponding to the plurality of selectors, wherein each selector is configured to convert a source signal from a corresponding source from the plurality of sources into an in-phase analog input signal and a quadrature-phase analog input signal responsive to the corresponding in-phase and quadrature-phase bit pair;
- and
- a summation network configured to sum the in-phase analog input signals from each selector in the plurality of selectors to form an in-phase analog output signal and to sum the quadrature-phase analog input signals from each selector in the plurality of selectors to form a quadrature-phase analog output signal.
1 more element
A method of operation for a combined I/Q DAC, comprising:
- driving a plurality of multiplexers with a corresponding plurality of source signals such that each multiplexer is driven with a corresponding source signal from the plurality of source signals;
- providing each multiplexer with a corresponding in-phase and quadrature-phase bit pair;
- and
- multiplexing the corresponding source signal through each multiplexer to a node in a summation network responsive to a digital value of the corresponding in-phase and quadrature-phase bit pair.
1 more element
A digital-to-analog converter, comprising:
- a summation network including a plurality of nodes for an in-phase analog output signal and a quadrature-phase analog output signal;
- a plurality of sources;
- and
- a plurality of multiplexers corresponding to the plurality of sources, each multiplexer coupled to a corresponding source from the plurality of sources and being configured to multiplex a source signal from the corresponding source to a corresponding node from the plurality of nodes responsive to a digital value of a corresponding in-phase and quadrature-phase bit pair.
1 more element
Dependencies are inferred from the claim text.