Digital pre-distortion compensation of digital-to-analog converter non-linearity

A method comprising:

• receiving, by a digital correction circuit, a first digital input value in a resolution higher than supported by a digital-to-analog converter (DAC);
• converting, by a first sigma-delta modulator of the digital correction circuit, one or more fractional bits of the first digital input value into integer bits of the first digital input value;
• accessing, by the digital correction circuit, a code unit using a portion of most significant bits (MSB's) of the first digital input value;
• retrieving, by the digital correction circuit, a first correction value of a plurality of correction values from the code unit as a result of accessing the code unit;
• and
• conveying, to the DAC by the digital correction circuit, a first digital sum of based at least in part on the first correction value and the first digital input value to, wherein an analog output generated by the DAC for the first digital sum is an analog representation of the first digital input value.

A system comprising:

• a digital-to-analog converter (DAC);
• and
• a digital correction circuit configured to:
• receive a first digital input value in a resolution higher than supported by the DAC;
• convert, using a first sigma-delta modulator, one or more fractional bits of the first digital input value into integer bits of the first digital input value;
• access a code unit using a portion of most significant bits (MSB's) of the first digital input value;
• retrieve a first correction value of a plurality of correction values from the code unit as a result of the access;
• and
• convey, to the DAC, a first digital sum ef based at least in part on the first correction value and the first digital input value, wherein an analog output generated by the DAC for the first digital sum is an analog representation of the first digital input value.