High-speed digital-to-analog converter
AssigneeMediaTek Singapore Pte. Ltd.
InventorNathan Egan
Life of this patent
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Abstract
A digital-to-analog converter (DAC) capable of operating in radio frequency (RF) with linear output, low distortion, low power consumption, and input data independence. The DAC includes switch drivers and output switches driven by the switch drivers. The switch drivers include pairs of outputs, and positive feedback circuitries coupled between respective pairs of outputs. The output switches are arranged between a first current source configured to push current to the DAC's outputs and a second current source configured to pull current from the DAC's outputs. Different output switches are configured to push current to and pull current from the DAC's outputs in accordance with rising edges and falling edges, respectively.
Claims20
A digital-to-analog converter (DAC) comprising:
- first and second switches;
- a current source configured to push current to a first output through the first switch based on a first signal and a second output through the second switch based on a second signal;
- and
- a switch driver configured to receive a data signal and a clock signal, the switch driver comprising a latch and a positive feedback circuitry, the latch comprising a first output node for the first signal and a second output node for the second signal, the positive feedback circuitry configured to connect the first output node and the second output node.
A digital-to-analog converter (DAC) comprising:
- a first current source configured to push current to first and second outputs;
- a second current source configured to pull current from the first and second outputs;
- and
- a plurality of switch branches configured to, triggered by a first-type edge of a clock signal, push current of the first current source to the first output and pull current of the second current source from the second output, and, triggered by a following second-type edge of the clock signal, push current of the first current source to the second output and pull current of the second current source from the first output.
Dependencies are inferred from the claim text.