Patent ID: 6965407

Claim:
Arrangement for converting analog pixel values from an array of pixels to a digital video signal, said array comprising a plurality of columns and at least one row, each column having at one pixel therein, and each column providing a respective pixel value; the arrangement comprising an N-bit counter; an N-bit DAC connected to said counter and having a ramp output providing a signal corresponding to a count existing on said counter; a plurality of digital storage elements each associated with a respective one of said columns; a counter bus connecting an output of said counter to inputs of said digital storage elements; a plurality of comparators each associated with a respective one of said columns, and having one input connected to receive the respective column pixel value, another input connected to the ramp output of said N-bit counter, and a comparator output connected to a gating terminal of the respective digital storage element; a video readout bus; and means selectively transferring contents of said digital storage elements to said video output bus to produce said digital video signal.