| CPC H04N 25/67 (2023.01) [H04N 25/616 (2023.01); H04N 25/671 (2023.01); H04N 25/706 (2023.01); H04N 25/709 (2023.01); H04N 25/7795 (2023.01); H04N 25/78 (2023.01)] | 37 Claims |
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1. A method of operating a two-tap pixel to reduce fixed pattern noise, the method comprising:
during a first sub-exposure period of a frame,
operating a first tap of the two-tap pixel to capture a first signal corresponding to first charge at a first floating diffusion of the first tap, wherein operating the first tap includes activating a first transfer transistor of the first tap to transfer the first charge to the first floating diffusion, and wherein the first charge is generated by a photosensor of the two-tap pixel in response to first light incident on the photosensor, and
operating a second tap of the two-tap pixel to capture a first parasitic signal corresponding to fixed pattern noise (FPN) at a second floating diffusion of the second tap; and
during a second sub-exposure period of the frame,
operating the second tap to capture a second signal corresponding to second charge at the second floating diffusion, wherein operating the second tap includes activating a second transfer transistor of the second tap to transfer the second charge to the second floating diffusion, and wherein the second charge is generated by the photosensor in response to second light incident on the photosensor, and
operating the first tap to capture a second parasitic signal corresponding to FPN at the first floating diffusion.
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