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System and method for increasing sensor resolution using interpolation

  • US 7,386,415 B2
  • Filed: 07/12/2005
  • Issued: 06/10/2008
  • Est. Priority Date: 07/12/2004
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • receiving an analog sensor signal associated with a coding surface;

    deriving a quadrature signal based at least in part on an analog threshold voltage associated with the analog sensor signal;

    determining a velocity and a derived quadrature position of the coding surface based at least in part on the quadrature signal; and

    if the velocity exceeds a velocity threshold;

    outputting the derived quadrature position of the coding surface;

    otherwise;

    determining an analog interpolated position based at least in part on the analog sensor signal,determining a hybrid interpolated position based at least in part on the analog interpolated position and the derived quadrature position, andoutputting the hybrid interpolated position.

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