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X-y addressable CMOS APS with compact pixel pitch

  • US 20030193593A1
  • Filed: 06/05/2003
  • Published: 10/16/2003
  • Est. Priority Date: 05/22/1996
  • Status: Abandoned Application
First Claim
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1. An active pixel sensor that is X-Y addressable comprising:

  • an X-Y addressable imager arranged in a series of rows and columns having signal lines in both first and second directions for enabling readout of selected rows and columns;

    only one pair of serial shift registers operatively connected to the X-Y imager;

    only one serial shift register in the first direction and only one serial shift register in the second direction to select signal lines to be applied to the X-Y imager;

    means for reading out selected locations from the X-Y addressable imager; and

    a loading mechanism operatively coupled to the shift registers that is capable of placing programmable, real-time, user-defined bit patterns into the shift registers that identify any individual selected row and column by placement of a pair of start addresses to a subset of the X-Y addressable imager and subsequently causes the shift registers to scan only and directly through any individual selected row and column for skipping the non-selected rows and columns;

    wherein the shift register starts and stops on any individual selected row and column in which output is enabled at the first clock cycle of the shift register in the first direction without waiting for an enable signal to propagate through non-selected columns.

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