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Switched-capacitor tuning of a proportional-integral-derivative controller

  • US 10,359,740 B2
  • Filed: 08/14/2017
  • Issued: 07/23/2019
  • Est. Priority Date: 08/14/2017
  • Status: Active Grant
First Claim
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1. A proportional-integral-derivative, comprising:

  • a first capacitor comprising a first capacitor first end and a first capacitor second end opposite the first capacitor first end;

    a first switch comprising a first switch first end and a first switch second end,a second capacitor comprising a first end and a second end opposite the first end; and

    a second switch comprising a first end and a second end,where the first switch first end is coupled to the first capacitor first end,where the first switch second end alternates at a first frequency between at least two points such that a first resistance is produced,where the second switch first end is coupled to the second capacitor first end,where the second switch second end alternates at a second frequency between at least two points such that a second resistance is produced,where the first resistance corresponds to the first frequency,where the second resistance corresponds to the second frequency,where the first resistance and the second resistance are different, andwhere the first frequency and the second frequency are differentwhere upon identification of the first frequency the first switch alternates at the first frequency at a first point in time,where, at a second point in time after the first point in time, the first switch drifts such that the first switch alternates at a drift frequency different from the first frequency, andwhere, at a third point in time after the second point in time, a correction is made to the first switch such that the first switch returns to the first frequency,where the proportional-integral-derivative controller produces an output voltage,where the first frequency and the second frequency are selected through use of Ziegler-Nichols tuning rules such that the output voltage is non-oscillating, andwhere the output voltage is a correction voltage for an error of an apparatus operatively coupled to the proportional-integral-derivative controller.

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