| CPC H04N 17/002 (2013.01) [H04N 23/54 (2023.01); H04N 23/667 (2023.01)] | 17 Claims |
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1. A method of operating of an image sensing device, the method comprising:
generating first digital codes by performing a first column-parallel analog-to-digital converting using a plurality of analog-to-digital converters based on a pixel reset voltage and a clamp voltage for a plurality of column lines;
first comparing the first digital codes and a first threshold value;
generating second digital codes by performing a second column-parallel analog-to-digital converting based on the clamp voltage for the plurality of column lines and not the pixel reset voltage;
second comparing the second digital codes and a second threshold value; and
generating an error information based results of the first comparing and the second comparing.
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