Camera with adaptive photoreceptors in analog CMOS technology

Abstract

A system of adaptive photoreceptors has been designed and built in a standard CMOS process. The mechanism of adaptation is based on an analog feedback circuit modelled after the biological example. The system exhibits a large dynamic range of approximately 7 orders of magnitude in light intensity and a pronounced capability to detect moving objects. Simulations and measurements with single adaptive receptors as well as first experiences with a camera system are presented.