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Article

A Highly Robust Interface Circuit for Resistive Sensors

1
CONACyT—Tecnológico Nacional de México—Instituto Tecnológico de la Laguna, Torreón 27000, Mexico
2
CONACyT—Universidad Autónoma del Estado de México, Ecatepec de Morelos 55020, Mexico
3
Instituto Tecnológico de la Laguna, Torreón 27000, Coahuila, Mexico
*
Author to whom correspondence should be addressed.
Electronics 2019, 8(3), 263; https://doi.org/10.3390/electronics8030263
Received: 17 January 2019 / Revised: 19 February 2019 / Accepted: 19 February 2019 / Published: 28 February 2019
(This article belongs to the Special Issue Signal Processing and Analysis of Electrical Circuit)
The signal from a resistive sensor must be converted into a digital signal to be compatible with a computer through an interface circuit. Resistance-to-Period converter, used as interface, is preferred if the resistance variations are very large. This paper presents the structure of an interface circuit for resistive sensors that is highly robust to component and power supply variations. Robustness is achieved by using the ratiometric approach, thus complex circuits or highly accurate voltage references are not necessary. To validate the proposed approach, a prototype was implemented using discrete components. Measurements were carried out considering a variation of ±35% in the single supply voltage and a range from 1 k Ω to 1 M Ω . View Full-Text
Keywords: Resistance-to-Period converter; robust read-out circuits; ratiometric technique Resistance-to-Period converter; robust read-out circuits; ratiometric technique
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MDPI and ACS Style

Gómez-Ramírez, E.; Maeda-Nunez, L.A.; Álvarez-Simón, L.C.; Flores-García, F.G. A Highly Robust Interface Circuit for Resistive Sensors. Electronics 2019, 8, 263. https://doi.org/10.3390/electronics8030263

AMA Style

Gómez-Ramírez E, Maeda-Nunez LA, Álvarez-Simón LC, Flores-García FG. A Highly Robust Interface Circuit for Resistive Sensors. Electronics. 2019; 8(3):263. https://doi.org/10.3390/electronics8030263

Chicago/Turabian Style

Gómez-Ramírez, Emmanuel, L. A. Maeda-Nunez, Luis C. Álvarez-Simón, and F. G. Flores-García 2019. "A Highly Robust Interface Circuit for Resistive Sensors" Electronics 8, no. 3: 263. https://doi.org/10.3390/electronics8030263

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