CPC H04N 25/772 (2023.01) [H03F 3/45264 (2013.01); H03F 3/45273 (2013.01); H04N 25/71 (2023.01); H04N 25/713 (2023.01); H04N 25/75 (2023.01); H04N 25/77 (2023.01)] | 20 Claims |
1. An integrated-circuit image sensor, comprising:
a first photodetector circuit having a first photodiode and a second photodiode that is shielded from exposure to incident light; and
control circuitry to:
reset the first photodiode to commence an exposure interval over which an output voltage of the first photodetector circuit changes monotonically in response to photon strikes;
reset the second photodiode concurrently with resetting the first photodiode; and
iteratively sample the output voltage of the first photodetector circuit during the exposure interval to generate a sequence of single-bit data values corresponding to respective event-detection intervals that transpire sequentially within the exposure interval.
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