Patent ID: 9247165
Filing Date: 2016-01-26
CPC Classification: H04N

Claim Text:
1. A CMOS image sensor comprising: an active pixel sensor suitable for generating a pixel signal corresponding to incident light; a reference pixel array suitable for shielding incident light and generate a reference value; a readout circuit suitable for comparing the pixel signal and the reference value with a ramp signal and removing a first noise of the pixel signal in a common mode; and a pixel signal processing circuit suitable for performing a linear operation on an output signal from the readout circuit and the reference value and removing a second noise of the pixel signal in the common mode, wherein the pixel signal processing circuit calculates a difference between a first reference value and a second reference value included in the output signal from the readout circuit, applies a weight to the pixel signal and calculates a difference between the pixel signal and the difference between the first reference value and second reference value.