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US 12,355,455 B2Granted
Digital-to-analog converter with sorting of unit cells that is based on mismatch errors and/or selection of new pointer location that is based on utilization rates of unit cells and associated method
AssigneeMediatek Inc.
InventorsWei-Hao Sun, Chuan-Hung Hsiao, Sung-Han Wen
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Abstract
A digital-to-analog converter (DAC) includes a plurality of DAC cells, a mismatch error sorting circuit, and a dynamic element matching (DEM) circuit. The mismatch error sorting circuit generates a sorting result of the plurality of DAC cells according to mismatch error levels of the plurality of DAC cells. The DEM circuit shapes the mismatch error levels of the plurality of DAC cells according to the sorting result of the plurality of DAC cells.
Claims20
A digital-to-analog converter (DAC) comprising:
- a plurality of DAC cells;
- a mismatch error sorting circuit, arranged to generate a sorting result of the plurality of DAC cells according to mismatch error levels of the plurality of DAC cells;
- and
- a dynamic element matching (DEM) circuit, arranged to shape the mismatch error levels of the plurality of DAC cells according to the sorting result of the plurality of DAC cells.
1 more element
A digital-to-analog converter (DAC) comprising:
- a plurality of DAC cells;
- a storage device, arranged to record utilization rates of the plurality of DAC cells;
- a pointer location selecting circuit, arranged to select a new pointer location according to the utilization rates of the plurality of DAC cells and an input code;
- and
- a dynamic element matching (DEM) circuit, arranged to shape mismatch error levels of the plurality of DAC cells according to the new pointer location selected by the pointer location selecting circuit and the input code received by the DEM circuit.
2 more elements
A digital-to-analog conversion method comprising:
- generating a sorting result of a plurality of DAC cells according to mismatch error levels of the plurality of DAC cells;
- and
- performing a dynamic element matching (DEM) operation to shape the mismatch error levels of the plurality of DAC cells according to the sorting result of the plurality of DAC cells.
Dependencies are inferred from the claim text.