Low distortion feed forward delta sigma modulator

Low distortion feed forward delta sigma modulator

  • CN 104,718,705 B
  • Filed: 07/30/2013
  • Issued: 11/03/2020
  • Est. Priority Date: 08/02/2012
  • Status: Active Grant
First Claim
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1. A low distortion feed forward delta sigma modulator comprising:

  • a first summer operable to receive the feedback signal and the input signal;

    a first integrator operable to receive an output from the first adder;

    a second integrator operable to receive an output from the first integrator;

    a third integrator operable to receive an output from the second integrator;

    a second summer operable to receive a second integrated path from the second integrator, a first integration path from the first integrator, a first summing path from the input signal, a second summing path from the first integrator, and an output from the third integrator, wherein the second summing path is separate from the first integration path;

    a last integrator operable to receive an output from the second adder; and

    a quantizer operable to feed an output back to the first adder and also output from the low distortion feed forward delta sigma modulator,wherein the first summing path, second summing path, first integrating path, and second integrated path each comprise amplification and/or delay, and a weighted sum of the second integrated path from the second integrator, the first integrating path from the first integrator, the first summing path from the input signal, the second summing path from the first integrator, and an output from the third integrator is less than a weighted sum of gains of orders provided by a transfer function of the low distortion feed forward delta sigma modulator.

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