Patent ID: 8085321
Filing Date: 2011-12-27
Classification: H01L,H04N

Abstract:
1. A method of operating an array of pixels of an image sensor, each pixel having a photosensor, an associated storage device, and a floating diffusion region, said array of pixels being configured as a plurality of rows and columns, said method comprising: accumulating charges in said photosensors; resetting a first row of said associated storage devices for a first time as part of a first rolling reset; resetting a second row of said associated storage devices for a first time as part of said first rolling reset; transferring accumulated charges from a first and a second row of said photosensors to said first row of associated storage devices and a second row of associated storage devices respectively; transferring charges from said first row of said associated storage devices to a first row of associated floating diffusion regions effectively resetting for a second time said first row of associated storage devices; transferring charges from said second row of said associated storage devices to a second row of associated floating diffusion regions effectively resetting for a second time said second row of associated storage devices; and reading out the charges residing in the floating diffusion regions.