Column-Parallel Oversampled ADCs for High Performance CMOS Image Sensors(Circuit technologies,2nd Asian Image Sensors and Imaging Systems Symposium)

Abstract

In this paper, the operation of column-parallel oversampled ADCs for CMOS imager is reviewed and several implementations are described. Both architectural and circuit level innovations are explained for practical column-parallel implementations and prototype implementations are described. Because of their multiple sampling nature, such column-parallel oversampled ADCs have also been investigated for high performance imagers, e.g. low-light level imaging and compressed sensing. Finally, several extensions of column-parallel oversampled ADCs are briefly discussed.