Imaging device, optoelectronic device and method for operating an imaging device

A method for operating an imaging device comprising a plurality of pixels, for each pixel of the plurality of pixels the method comprising:

• during an exposure period:
• accumulating, at a photosensitive stage, charge carriers by converting electromagnetic radiation with a photodetector,
• transferring a first amount of charge carriers from the photodetector via a diffusion node and an electrical interconnection to a second capacitor of a sample-and-hold stage;
• during a storage period:
• generating, at the diffusion node, an adjusted high light signal corresponding to the first amount of charge carriers and a reset level,
• buffering, via a first source follower, the adjusted high light signal from the diffusion node to the second capacitor,
• transferring a second amount of charge carriers from the photodetector to the diffusion node, and
• buffering, via the first source follower, a low light signal corresponding to the second amount of charge carriers from the diffusion node to a first capacitor of the sample-and-hold stage;
• and
• during a readout period:
• reading, at a readout stage, the adjusted high light signal out from the second capacitor, and
• reading, at the readout stage, the low light signal out from the first capacitor.

An imaging device comprising a plurality of pixels, each pixel of the plurality of pixels comprising:

• a photosensitive stage, comprising a photodetector configured to accumulate charge carriers by converting electromagnetic radiation, and a diffusion node electrically coupled to the photodetector via a transfer switch;
• a sample-and-hold stage, comprising a first source follower, wherein a gate terminal of the first source follower is electrically connected to the diffusion node, and further comprising a switchable first capacitor and a switchable second capacitor that are electrically coupled to an output terminal of the first source follower;
• a readout stage, comprising a second source follower and a select switch, wherein a gate terminal of the second source follower is electrically connected to an output of the sample-and-hold stage, and wherein the select switch is electrically connected between an output terminal of the second source follower and a column bus of the imaging device;
• and
• an electrical interconnection comprising a gain switch, wherein a first terminal of the gain switch is electrically connected to the diffusion node and a second terminal of the gain switch is electrically connected to a first terminal of the second capacitor.