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CHOPPED CIRCUIT WITH AC AND DC RIPPLE ERROR FEEDBACK LOOPS

  • US 20140077873A1
  • Filed: 09/14/2012
  • Published: 03/20/2014
  • Est. Priority Date: 09/14/2012
  • Status: Active Grant
First Claim
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1. A system, comprising:

  • a main signal path configured to receive an input signal, comprising;

    a first chopping correction circuit configured to chop the input signal at a first frequency to reduce an offset error in the input signal; and

    a second chopping correction circuit configured to chop the input signal at a second frequency to further reduce the offset error;

    a first feedback loop configured to generate a first compensation signal, which is fed back to the main signal path to mitigate a first chopper ripple error generated by the first chopping correction circuit; and

    a second feedback loop configured to generate a second compensation signal, which is fed back to the main signal path to mitigate a second chopper ripple error generated by the second chopping correction circuit.

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