Image sensor

The utility model provides an image sensor, which comprises a plurality of columns of current sources and a sharing compensation unit, each column of current source is connected with the output end of a corresponding pixel unit through a corresponding column line, and the sharing compensation unit is connected with each column of current source through a sharing node; and each column of current sources introduces the first power supply noise to the output end of the corresponding pixel unit through the sharing compensation unit so as to suppress the second power supply noise in the pixel voltage output by the corresponding pixel unit. According to the utility model, the problem that the signal-to-noise ratio of the existing image sensor is reduced due to the influence of power supply noise is solved. 本实用新型提供一种图像传感器，包括：若干列电流源及共享补偿单元，各列电流源通过相应列线与相应像素单元的输出端相连，共享补偿单元通过共享节点与各列电流源相连；各列电流源通过共享补偿单元将第一电源噪声引入至相应像素单元的输出端，以抑制相应像素单元输出像素电压中的第二电源噪声。通过本实用新型解决了现有图像传感器受电源噪声影响导致信噪比降低的问题。