Patent ID: 9609240
Date: 2017-03-28
CPC Classifications: H01L,H04N

Claim:
1. An imaging device comprising: a pixel array comprising a plurality of pixel units arranged in a matrix pattern, wherein the plurality of pixel units includes a first pixel unit configured to generate a first analog signal and a second pixel unit configured to generate a second analog signal; a reference signal generator configured to generate a reference signal; a first comparator coupled to the first pixel unit and configured to compare the reference signal with the first analog signal; a second comparator coupled to the second pixel unit and configured to compare the reference signal with the second analog signal; a first switching circuitry coupled to an output terminal of the first comparator and an input terminal of a first counter; a second switching circuitry coupled to an output terminal of the second comparator and an input terminal of a second counter; a third switching circuitry coupled to the output terminal of the first comparator and the input terminal of the second counter; and a fourth switching circuitry coupled to the output terminal of the second comparator and the input terminal of the first counter.