A Sub-μW fully programmable CMOS DPS for uncooled infrared fast imaging

This paper presents a new low-power and fully programmable digital CMOS active pixel sensor for uncooled and fast IR imagers. The proposed self-biased topology includes built-in input capacitance compensation, mixed integration, A/D conversion and a purely digital I/O interface, all at pixel level. Furthermore, full FPN compensation is also supplied by digital tuning of the individual offset and gain of each DPS during read-out at no speed costs. Two circuit implementations for IR PbSe sensors have been integrated in standard 0.35μm CMOS 2-polySi 4-metal technology, and exhaustive experimental data is presented from electrical tests.