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Methods and apparatus for high dynamic operation of a pixel cell

  • US 8,184,188 B2
  • Filed: 03/12/2009
  • Issued: 05/22/2012
  • Est. Priority Date: 03/12/2009
  • Status: Active Grant
First Claim
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1. A method of operating a pixel circuit comprising:

  • generating a first photo-generated charge in at least one photoconversion region during a first exposure period;

    transferring at least a portion of said first photo-generated charge to a first storage region;

    generating a second photo-generated charge in said at least one photoconversion region during a second exposure period;

    transferring said at least a portion of said first photo-generated charge to a second storage region;

    sampling said at least a portion of said first photo-generated charge during said second exposure period;

    transferring said second photo-generated charge to said second storage region; and

    sampling said second photo-generated charge.

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