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Adaptive spectral noise shaping to improve time to digital converter quantization resolution using dithering

  • US 20080068236A1
  • Filed: 09/11/2007
  • Published: 03/20/2008
  • Est. Priority Date: 09/15/2006
  • Status: Active Grant
First Claim
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1. A method of adaptively reducing quantization noise in a closed loop control system, said method comprising the steps of:

  • providing a reference analog quantity;

    providing a variable analog quantity;

    applying dithered spectral noise shaping to said reference analog quantity to generate a reference noise shaped quantity;

    calculating a quantized difference between said reference noise shaped quantity and said variable analog quantity; and

    filtering said quantized difference to obtain a control signal of said variable analog quantity.

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