Method and apparatus for master/slave digital-to-analog conversion

A method for digital-to-analog conversion, comprising:

• generating a master analog value based on a digital input, and
• generating a slave analog value that is based on said master analog value, wherein said slave digital-to-analog converter has a plurality of steps that are substantially proportional to said master analog value and wherein said digital-to-analog conversion has an output that is substantially equal to a sum of a first signal that is substantially proportional to said master analog value and a second signal that is substantially proportional to said slave analog value.

An integrated circuit, comprising:

• a digital-to-analog converter comprising:
• a master digital-to-analog converter that generates a master analog value, and
• a slave digital-to-analog converter that generates a slave analog value that is based on said master analog value, wherein said slave digital-to-analog converter has a plurality of steps that are substantially proportional to said master analog value and wherein said digital-to-analog converter has an output that is substantially equal to a sum of a first signal that is substantially proportional to said master analog value and a second signal that is substantially proportional to said slave analog value.

A digital-to-analog converter, comprising:

• a master digital-to-analog converter that generates a master analog value, and
• a slave digital-to-analog converter that generates a slave analog value that is based on said master analog value, wherein said master analog value becomes substantially fixed upon detection of a predefined condition and wherein said slave analog value continues to vary.

A method for digital-to-analog conversion, comprising:

• generating a master analog value based on a digital input, and
• generating a slave analog value that is based on said master analog value, wherein said step of generating a slave analog value generates a slave analog value in which the quantization step size of said slave analog value is a fixed percentage of said master analog value.

A method for digital-to-analog conversion, comprising:

• generating a master analog value based on a digital input, and
• generating a slave analog value that is based on said master analog value, wherein said master analog value becomes substantially fixed upon detection of a predefined condition and wherein said slave analog value continues to vary.