Patent ID: 7397509
Filing Date: 2008-07-08
Classification: H04N

Abstract:
1. An imaging circuit, comprising: a pixel comprising a photodiode for photo-generating charge, a charge storage region for storing said charge, a floating diffusion region, and a charge transfer transistor for transferring charge from said charge storage region to said floating diffusion region; a signal input node for receiving a reset signal, a first photo signal, and a second photo signal; a first sample and hold circuit for receiving said first photo signal from said signal input node, said first photo signal representing an amount of charge generated by said photodiode; a second sample and hold circuit for receiving said second photo signal from said signal input node, said second photo signal representing an amount of charge generated by said photodiode; a third sample and hold circuit coupled to said signal input node; a first output circuit, coupled to receive signals from said first and second sample and hold circuits; and a second output circuit, coupled to receive signals from said first and third sample and hold circuits.