A CMOS Mixed Mode Non-Linear Processing Unit for Adaptive Sensor Conditioning in Portable Smart Systems

Martinez-Nieto, A. ; Sanz-Pascual, M.T. ; Marquez, A. (Universidad de Zaragoza) ; Perez-Bailon, J. (Universidad de Zaragoza) ; Calvo, B. (Universidad de Zaragoza) ; Medrano, N. (Universidad de Zaragoza)

Resumen: This 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.

Idioma: Inglés

DOI: 10.1016/j.proeng.2016.11.491

Año: 2016

Publicado en: Procedia Engineering 168 (2016), 1689-1692
ISSN: 1877-7058

Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/TEC2015-65750-R

Tipo y forma: Article (Published version)

Área (Departamento): Área Electrónica (Dpto. Ingeniería Electrón.Com.)