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Proceedings Paper

An adaptable interface between resistive sensors and microcontrollers
Author(s): J. Revuelto; N. Medrano; B. Calvo; G. Zatorre; S. Celma
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Paper Abstract

The increasing application of sensor networks in many different fields causes a growing demand of low-cost passive sensors for monitoring physical variables as temperature, pressure or ambient humidity. These sensors need a conditioning circuit that allows an easy interface to a microcontroller, taking advantage of the full range of the sensor and reducing the microcontroller requirements. This paper presents a conditioning electronics designed to transform the output of low-cost resistive sensors to a frequency variable signal. The circuit is designed to use the full frequency range available, providing a good resolution. These quasi-digital signals are compatible to the logic levels of a standard low-power microcontroller, allowing its connection through a digital I/O port.

Paper Details

Date Published: 28 May 2009
PDF: 8 pages
Proc. SPIE 7363, VLSI Circuits and Systems IV, 736315 (28 May 2009); doi: 10.1117/12.821638
Show Author Affiliations
J. Revuelto, Univ. of Zaragoza (Spain)
N. Medrano, Univ. of Zaragoza (Spain)
B. Calvo, Univ. of Zaragoza (Spain)
G. Zatorre, Teltronic S.A.U. (Spain)
S. Celma, Univ. of Zaragoza (Spain)

Published in SPIE Proceedings Vol. 7363:
VLSI Circuits and Systems IV
Teresa Riesgo; Eduardo de la Torre; Leandro Soares Indrusiak, Editor(s)

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