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Circuit and method for determining motion with redundant comb-arrays

  • US 8,547,336 B1
  • Filed: 02/08/2011
  • Issued: 10/01/2013
  • Est. Priority Date: 02/16/2006
  • Status: Active Grant
First Claim
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1. A method comprising:

  • generating for a first group of photosensitive elements a first quasi-sinusoidal signal at a first time, and a second quasi-sinusoidal signal at a second time in response to motion of light received thereon in a first direction;

    computing from the first and second quasi-sinusoidal signals a phase angle change;

    computing from the first and second quasi-sinusoidal signals a radius value;

    generating for a second group of photosensitive elements a third quasi-sinusoidal signal at the first time, and at the second time a fourth quasi-sinusoidal signal in response to the motion of the light received thereon in the first direction;

    computing from the third and fourth quasi-sinusoidal signals another phase angle change;

    computing from the third and fourth quasi-sinusoidal signals another radius value; and

    combining phase angle changes using radius-weighted-averaging to provide a single weighted average phase angle change resulting from the motion of the light in the first direction.

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