FRAME ADAPTIVE DIGITAL TO ANALOG CONVERTER AND METHODS FOR USE THEREWITH

摘要

A digital to analog converter (DAC) includes a thermometer coder that generates a plurality of micro-current source analog controls on a frame-by-frame or symbol-by-symbol basis and to process digital inputs from symbols or frames of data based on a thermometer coding to generate a plurality of micro-current source inputs. A plurality of micro-current sources generate a corresponding plurality of micro-current source outputs in response to the plurality of micro-current source inputs, wherein first selected ones of the plurality of micro-current sources are powered-off in response to the plurality of micro-current source analog controls for a first symbol or frame of the plurality of symbols or frames of data. A summing circuit generates an analog output based a sum of the corresponding plurality of micro-current source outputs.

主权项

1. A digital to analog converter (DAC) comprising:
a first thermometer coder configured to process a digital input based on a first thermometer coding to generate a plurality of sub-DAC inputs and a plurality of sub-DAC analog controls; a plurality of sub-DACs, coupled to the first thermometer coder, configured to generate a corresponding plurality of sub-DAC outputs in response to the plurality of sub-DAC inputs, wherein first selected ones of the plurality of sub-DACs are powered-off in response to the plurality of sub-DAC analog controls; and a first summing circuit, coupled to the plurality of sub-DACs, configured to generate an analog output based a sum of the corresponding plurality of sub-DAC outputs.