Patent ID: 9264639
Filing Date: 2016-02-16
CPC Classification: H01L,H04N

Claim Text:
1. A method of operation within an integrated-circuit image sensor having a pixel array, the method comprising: generating, on a first signal line of the pixel array that is connected to a transfer gate of a first pixel within the pixel array, a control pulse that enables photocharge accumulated within a photosensitive element of the first pixel to be transferred to a floating diffusion node, the first signal line having a capacitive coupling to the floating diffusion node; generating, on a second signal line of the pixel array that also has a capacitive coupling to the floating diffusion node, a first feedthrough compensation pulse having a pulse polarity opposite a pulse polarity of the control pulse and that is timed to coincide with the control pulse such that capacitive feedthrough of the control pulse to the floating diffusion node is reduced; and wherein the pixel array comprises a first pixel row constituted by a first plurality of pixels, including the first pixel, connected to the first signal line, and a second pixel row constituted by a second plurality of pixels connected to the second signal line, and wherein the second signal line is coupled to a respective transfer gate within each pixel of the second plurality of pixels.