Phase mixer non-linearity compensation within clock and data recovery circuitry

A method comprising:

• receiving, at an input node, a first compensation value;
• generating a first compensation signal based on the first compensation value by:
• delaying, with a first delay element, the first compensation value;
• and
• generating, with a summation element, a non-linearity signal from the first compensation value and the delayed first compensation value, wherein the first delay element is coupled between the input node and an input of the summation element and a second input of the summation element is coupled to the input node;
• compensating for a first non-linearity within phase mixer (PMIX) circuitry based on the first compensation signal and a phase accumulator input update signal to generate a compensated signal;
• and
• generating a clock signal based on the compensated signal by the PMIX circuitry.

A non-transitory computer readable medium comprising stored instructions, which when executed by a processor, cause the processor to:

• provide compensation circuitry of clock and data recovery (CDR) circuitry, wherein the compensation circuitry comprises:
• an input node that receives a first compensation value;
• a first delay element that receives the first compensation value from the input node and delays the first compensation value;
• and
• a summation element that subtracts a delayed version of the first compensation value from the first compensation value to generate a first non-linearity value, wherein the first delay element is coupled between the input node and a first input of the summation element, and wherein a second input of the summation element is coupled to the input node, wherein the compensation circuitry generates a first compensation signal based on the first non-linearity value;
• and
• provide phase accumulation circuitry of the CDR circuitry, wherein the phase accumulation circuitry compensates for a first non-linearity within phase mixer (PMIX) circuitry based on the first compensation signal.