doi:10.1016/j.proeng.2016.11.491engMartinez-Nieto, A.Sanz-Pascual, M.T.Marquez, A.Perez-Bailon, J.Calvo, B.Medrano, N.A CMOS Mixed Mode Non-Linear Processing Unit for Adaptive Sensor Conditioning in Portable Smart SystemsART-2016-106037This paper presents the architecture of a novel non-linear digitally programmable analog unit for sensor output conditioning in battery-operated smart systems. Designed in an 180nm 1.8V standard CMOS technology, by properly setting the 6-bit registers in the arithmetic unit, the voltage inputs are weighted before being processed by a non-linear circuit. Thus, a processing system consisting of a set of these devices suitably tuned and interconnected can be applied to condition a non-linear sensor, improving its behavior both in linearity and operating range, while reducing the effects of cross sensitivity. The robustness of the digital weight tuning is tested simulating a chip-on-the-loop training using a Levenberg-Marquardt-based algorithm. Electric simulations of the proposed unit and the results of its application in a complete neural network-based processing system to improve the linear operating range of a thermistor are presented.2016http://zaguan.unizar.es/record/7067010.1016/j.proeng.2016.11.491http://zaguan.unizar.es/record/70670oai:zaguan.unizar.es:70670info:eu-repo/grantAgreement/ES/MINECO-FEDER/TEC2015-65750-RProcedia Engineering 168 (2016), 1689-1692by-nc-ndhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccess