System and method of replicating and cancelling chopping folding error in delta-sigma modulators

A method, comprising:

• converting an input signal with a delta-sigma modulator comprising a loop filter coupled to a quantizer having an output for providing a digital signal;
• chopping analog signals of the loop filter at a chopping frequency;
• replicating a chopping folding error generated by the chopping of the analog signals based on digitally chopping the digital signal at the chopping frequency, the replicating comprising:
• chopping the digital signal at the chopping frequency and providing a chopped digital signal;
• and
• amplifying the chopped digital signal by a gain value for providing the replicated chopping folding error;
• and
• subtracting the replicated chopping folding error from the digital signal and providing a corrected digital signal.

A method, comprising:

• converting an input signal with a delta-sigma modulator comprising a loop filter coupled to a quantizer having an output for providing a digital signal;
• chopping analog signals of the loop filter at a chopping frequency;
• replicating a chopping folding error generated by the chopping of the analog signals based on digitally chopping the digital signal at the chopping frequency;
• calibrating circuitry used for the replicating;
• and
• subtracting the replicated chopping folding error from the digital signal and providing a corrected digital signal.