Partial reset HDR image sensor with improved fixed pattern noise performance Vrije Universiteit Brussel
An efficient method is presented to achieve 4T pixel dynamic range extension whilst keeping the fixed pattern noise (FPN) low. The method utilizes the floating diffusion node as a secondary photocharge integration node with a partial reset applied to the floating diffusion node. The output image signal is a recombination of the linear signal integrated in the photodiode node, and a compressed signal integrated in the floating diffusion node. ...