Image sensor

摘要

An image sensor for reducing a sampling time by shortening a stabilization duration is provided. The image sensor includes a pixel unit, a sampling unit sampling a signal from an output node of the pixel unit, a sinking unit sinking current from the output node of the pixel unit, and a current controller controlling the amount of current in the sinking unit.

主权项

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.