Patent ID: 9412782
Filing Date: 2016-08-09
CPC Classification: H01L,H04N

Claim Text:
1. A pixel sensor comprising: a photodiode characterized by a first light conversion efficiency and a main photodiode saturation exposure; a floating diffusion node; a gate that selectively connects said photodiode to said floating diffusion node; a readout amplifier that generates a signal indicative of a potential on said floating diffusion node, said signal being coupled to a first conductor in response to a select signal being received by said pixel sensor; and a reset gate that selectively connects said floating diffusion node to a reset bus at a reset potential, wherein said floating diffusion node comprises a parasitic photodiode characterized by a second light conversion efficiency, said first light conversion efficiency being greater than or equal to 30 times said second light conversion efficiency and said second light conversion efficiency being sufficient to measure light exposures greater than said main photodiode saturation exposure.