The present invention is related to an image sensor comprising an array of rows (i) and columns (j) of pixels (Xij), all the pixels of one column of the array being connected to at least one common pixel output line (Ij) having at least one memory element (Mj) and at least a first amplifying element...http://www.google.com/patents/US7289148?utm_source=gb-gplus-sharePatent US7289148 - Devices and methods for improving the image quality in an image sensor