Current-steering digital-to-analog converter with cancellation of dynamic distortion
AssigneeMaxim Integrated Products, Inc.
InventorJerzy Antoni Teterwak
Life of this patent
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Abstract
A digital to analog converter includes a first switch, a second switch, and a driver module. The first switch includes a first differential pair of transistors connected to first inputs to receive digital data for conversion to analog data based on a clock signal output by a clock, and first outputs to output the analog data. The second switch includes second and third differential pairs of transistors connected to second inputs and the first outputs. The driver module drives one of the second inputs based on the digital data and toggles the second switch during a first cycle of the clock signal if the first switch is not toggled during the first cycle of the clock signal.
Claims18
A digital to analog converter comprising:
- a first switch including a first differential pair of transistors connected to first inputs to receive digital data for conversion to analog data based on a clock signal output by a clock, and first outputs to output the analog data;
- a second switch including second and third differential pairs of transistors connected to second inputs and the first outputs;
- and
- a driver module that drives one of the second inputs based on the digital data and that toggles the second switch during a first cycle of the clock signal if the first switch is not toggled during the first cycle of the clock signal.
A method comprising:
- receiving digital data, for conversion to analog data based on a clock signal output by a clock, at first inputs of a first switch including a first differential pair of transistors connected to first outputs to output the analog data;
- driving one of second inputs of a second switch including second and third differential pairs of transistors connected to the second inputs and the first outputs based on the digital data;
- and
- toggling the second switch during a first cycle of the clock signal if the first switch is not toggled during the first cycle of the clock signal.
Dependencies are inferred from the claim text.