Patent ID: 7064313
Filing Date: 2006-06-20
Classification: H01L,H03F,H04N

Abstract:
1. A method of resetting a sensor having a reset transistor and a photo-detector, said method comprising: applying a first reset voltage to a gate of said reset transistor to deplete a first portion of a channel; applying a second reset voltage to said gate of said reset transistor to punch through a second portion of said channel to establish a discharge path for said photo-detector, wherein said second portion of said channel is closer to said photo-detector than said first portion of said channel; removing charges on said photo-detector through said discharge path; and reducing said second reset voltage on said gate of said reset transistor gradually over a period of time to a third voltage so as to collapse said second portion of said channel before said first portion of said channel collapses, such that remaining charges to be swept away from said photo-detector.