Wide range full-scale current configurable current-steering digital-to-analog converter (DAC)
AssigneeQUALCOMM Incorporated
InventorsBeomsoo Park, Ashok Swaminathan, Negar Rashidi, Nitz Saputra
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Abstract
Certain aspects of the present disclosure are directed towards a DAC comprising a plurality of DAC cells, wherein each of the DAC cells comprises: a first current source coupled to an output of the DAC cell; a second current source coupled to the output of the DAC cell; a resistive network including a plurality of resistive elements coupled between a voltage rail and the first current source, wherein the resistive network is coupled to the first current source and the second current source; and a plurality of switches coupled between the voltage rail and respective nodes of the resistive network.
Claims20
A digital-to-analog converter (DAC) comprising a plurality of DAC cells, wherein at least one of the DAC cells comprises:
- a first current source coupled to an output of the DAC cell, wherein a control input of the first current source is coupled to a first bias node of the DAC;
- a second current source coupled to the output of the DAC cell, wherein a control input of the second current source is coupled to a second bias node of the DAC, the second bias node being different than the first bias node;
- a resistive network including a plurality of resistive elements coupled between a voltage rail and the first current source, wherein the resistive network is coupled to the first current source and the second current source;
- and
- a plurality of switches coupled between the voltage rail and nodes of the resistive network.
A method for digital-to-analog conversion, comprising:
- receiving a digital input code at an input of a digital-to-analog converter (DAC) comprising a plurality of DAC cells;
- and
- generating, via the DAC, an analog output signal based on the digital input code, wherein each DAC cell in a set of the DAC cells comprises:
- a first current source coupled to an output of the DAC cell, wherein a control input of the first current source is coupled to a first bias node of the DAC;
- a second current source coupled to the output of the DAC cell, wherein a control input of the second current source is coupled to a second bias node of the DAC, the second bias node being different than the first bias node;
- a resistive network including a plurality of resistive elements coupled between a voltage rail and the first current source, wherein the resistive network is coupled to the first current source and the second current source;
- and
- a plurality of switches coupled between the voltage rail and nodes of the resistive network.
A wireless device comprising:
- one or more antennas;
- a digital-to-analog converter (DAC) comprising a plurality of DAC cells;
- and
- a transmit path coupled between the DAC and the one or more antennas, wherein at least one of the DAC cells comprises:
- a first current source coupled to an output of the DAC cell, wherein a control input of the first current source is coupled to a first bias node of the DAC;
- a second current source coupled to the output of the DAC cell, wherein a control input of the second current source is coupled to a second bias node of the DAC, the second bias node being different than the first bias node;
- a resistive network including a plurality of resistive elements coupled between a voltage rail and the first current source, wherein the resistive network is coupled to the first current source and the second current source;
- and
- a plurality of switches coupled between the voltage rail and nodes of the resistive network.
Dependencies are inferred from the claim text.