Phase interpolation calibration for timing recovery

A device comprising:

• a quantizer configured to generate a quantized phase signal responsive to an input phase signal;
• a phase interpolator;
• and
• calibration logic coupled to said quantizer and said phase interpolator and configured to output a corrected input phase signal to said phase interpolator responsive to said quantized phase signal, wherein said calibration logic comprises:
• a Look-Up Table (LUT) storing a set of predetermined values, wherein said set of predetermined values comprise expected differences between quantized phase signals and expected output phase values output of said phase interpolator;
• and
• first logic configured to:
• identify a matching predetermined value from said set of predetermined values based on said input phase signal;
• and
• generate said corrected input phase signal based on said matching predetermined value;
• and
• sending said corrected input phase signal to an input of said phase interpolator.

A device comprising;

• a phase detector;
• a loop filter coupled to said phase detector and configured to output an input phase signal;
• a phase interpolator;
• and
• calibration logic coupled to said phase interpolator and configured to output a corrected input phase signal to said phase interpolator responsive to said input phase signal, wherein said calibration logic comprises:
• a Look-Up Table (LUT) storing a set of predetermined values, wherein said set of predetermined values comprise expected output phase values of said phase interpolator;
• and
• first logic configured to:
• identify a matching predetermined value from said set of predetermined values based on said input phase signal;
• generate said corrected input phase signal based on said matching predetermined value;
• and
• send said corrected input phase signal to an input of said phase interpolator.