Patent ID: 8853608
Filing Date: 2014-10-07
Classification: G01J,H01L,H04N

Abstract:
1. An image sensor comprising: a sampling unit configured to sample a pixel signal from an output node of a pixel unit; a sinking unit comprising a current transistor connected between the output node of the pixel unit and a ground, and configured to sink current from the output node of the pixel unit; and a current controller configured to control the amount of current in the sinking unit, wherein the current controller comprises: a first control transistor configured to provide a first voltage to a gate of the current transistor when the sampling unit does not sample a pixel signal from the output node of the pixel unit; and a second control transistor configured to provide a second voltage larger than the first voltage to the gate of the current transistor when the sampling unit samples the pixel signal from the output node of the pixel unit.