Methods and apparatus to reduce non-linearity in analog to digital converters

A method comprising:

• converting an analog signal into a digital signal;
• determining a derivative of the digital signal;
• determining cross terms including a combination of the digital signal and the derivative of the digital signal;
• and
• determining a non-linearity term corresponding to the cross terms.

A tangible computer readable medium comprising instructions which, when executed, cause a machine to at least:

• convert an analog signal into a digital signal;
• determine a derivative of the digital signal;
• determine cross terms including a combination of the digital signal and the derivative of the digital signal;
• and
• determine a non-linearity term corresponding to the cross terms.

An apparatus comprising:

• an interleaved analog-to-digital converter including:
• a first component ADC to convert an analog signal into a first digital signal corresponding to first samples at first points in time;
• and
• a second component ADC to convert the analog signal into a second digital signal corresponding to second samples at second points in time different from the first points in time;
• and
• a non-linearity corrector coupled to the interleaved analog-to-digital converter to:
• determine a first non-linearity term corresponding to of the first and second digital signals;
• and
• combine the first non-linearity term with the first digital signal to reduce first non-linearity of the first digital signal.

A method comprising:

• converting, using a first component ADC, an analog signal into a first digital signal corresponding to first samples at first points in time;
• converting, using a second component ADC, the analog signal into a second digital signal corresponding to second samples at second points in time different from the first points in time;
• determining a first non-linearity term corresponding to of the first and second digital signals;
• and
• combining the first non-linearity term with the first digital signal to reduce first non-linearity of the first digital signal.

A tangible computer readable medium comprising instructions which, when executed, cause a machine to at least:

• convert an analog signal into a first digital signal corresponding to first samples at first points in time;
• convert the analog signal into a second digital signal corresponding to second samples at second points in time different from the first points in time;
• determine a first non-linearity term corresponding to the first and second digital signals;
• and
• combine the first non-linearity term with the first digital signal to reduce first non-linearity of the first digital signal.