Patent ID: 9210304
Filing Date: 2015-12-08
Classification: H01L,H04N

Abstract:
1. A low light adaptive photoelectric imager comprising: a phototransistor including an intrinsic gate, an extrinsic gate, and a drain, wherein the phototransistor is configured to receive incident light at least at the extrinsic gate and to convert the received incident light into an electric charge that varies responsive to an intensity of the received incident light, wherein the extrinsic gate and the drain are extrinsically doped such that a depletion capacitance between the intrinsic gate and the drain differs from a depletion capacitance between the intrinsic gate and the extrinsic gate effective to form an electric potential barrier in the phototransistor, the electric potential barrier effective to cause a gain of the phototransistor to non-linearly vary responsive to the intensity of the received incident light.