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Auto-Averaging RC Time Constant Calibration

  • US 20090140701A1
  • Filed: 12/03/2007
  • Published: 06/04/2009
  • Est. Priority Date: 12/03/2007
  • Status: Active Grant
First Claim
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1. A calibration circuit comprising:

  • two capacitor branches, wherein each capacitor branch includes a current source, at least one capacitor and a switch;

    a resistor branch connected to the two capacitor branches, that includes a current source that induces a reference voltage and a resistor; and

    a counter and charge commutation control that tracks charging cycles of the capacitors as they are charged and discharged.

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