IMAGE SENSOR PIXEL CELL READOUT ARCHITECTURE

摘要

An image sensor includes a pixel array including a plurality of pixel cells each including a floating diffusion node, a photosensitive element coupled to selectively transfer image charge to the floating diffusion node, and a feedback coupling capacitor coupled between the floating diffusion node and an output line. A bit line is coupled to selectively readout image data output from each one of a group of the plurality of pixel cells. An integrator is capacitively coupled to the bit line. The integrator is coupled to output an output signal on the output line in response to the image data. The output signal on the output line is capacitively coupled to the floating diffusion node through the feedback coupling capacitor to suppress a potential swing at the floating diffusion node of each one of the group of the plurality of pixel cells in response to the output signal.

主权项

1. An image sensor, comprising:
a pixel array including a plurality of pixel cells, wherein each one of the plurality of pixel cells includes:
a floating diffusion node;a photosensitive element coupled to selectively transfer image charge to the floating diffusion node; anda feedback coupling capacitor coupled between the floating diffusion node and an output line; a bit line coupled to selectively readout image data output from each one of a group of the plurality of pixel cells; and an integrator capacitively coupled to the bit line, wherein the integrator is coupled to output an output signal on the output line in response to the image data, wherein the output signal on the output line is capacitively coupled to the floating diffusion node through the feedback coupling capacitor to suppress a potential swing at the floating diffusion node of each one of the group of the plurality of pixel cells in response to the output signal.