Power and Area Efficient Column-Parallel ADC Architectures for CMOS Image Sensors

The ever-increasing resolution of CMOS imagers has had a profound impact on their analog readout electronics, and, in particular, on their ADC architecture. This paper gives an overview of the development of column-parallel ADCs that enable the high-speed and power-efficient readout of high-resolution CMOS imagers. In particular, the recently proposed multiple-ramp single-slope (MRSS) ADC will be discussed.