On February the 1st, 2011 the US Patent Office published the granted patent No. US 7,880,662. This patent covers CMOSIS column Analog to Digital Convertor (ADC) as implemented in the the standard, off-the-shelf CMOS image sensors products CMV2000 and CMV4000 and several custom image sensor developments. The patented ADC is of the counting ramp type. The advantages of this new ADC type are the fast analog to digital conversion resulting in high frame rates in combination with correlated double sampling in the digital domain resulting in very low fixed pattern noise and therefore a good image quality.