Method and apparatus for kTC noise canceling in a linear CMOS image sensor

摘要

The invention aims to provide a method of reading out a pixel signal from a first pixel (101) comprising (i) capturing a first black reference signal from said first pixel on a first black reference signal capacitor (117b) prior to said first pixel starting a first integration period, and (ii) after completion of said first integration period, capturing a first pixel signal from said first pixel on a pixel signal capacitor (117a); and characterized in that the method further comprises (iii) capturing a second black reference signal from a second pixel on a second black reference signal capacitor (117c) following completion of said first integration period and prior to said second pixel starting a second integration period, and (iv) after capturing the second black reference signal, outputting said first black reference signal and said first pixel signal through a buffer (121).