A 12-bit Folding-Integration/Cyclic ADC using DMOS capacitors for CMOS image sensors(Poster session,2nd Asian Image Sensors and Imaging Systems Symposium)

This paper presents a 12-bit folding-integration/cyclic (FI/Cyclic) ADC using depletion-mode MOS (DMOS) capacitors for CMOS image sensors (CISs). It has been verified by circuit simulation that the differential non-linearity (DNL) of the FI/Cyclic ADC caused by the voltage dependency of DMOS capacitor is very small.