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Sensors 2018, 18(4), 1107; https://doi.org/10.3390/s18041107

A Temperature-Hardened Sensor Interface with a 12-Bit Digital Output Using a Novel Pulse Width Modulation Technique

1
Grenoble Alpes University, CEA, LETI, F-38000 Grenoble, France
2
Laboratory of Informatics, Robotics and Microelectronics of Montpellier, University of Montpellier, CNRS, 34000 Montpellier, France
3
METS Research Group, National Engineers School of Sfax, Sfax University, Sfax 3029, Tunisia
*
Author to whom correspondence should be addressed.
Received: 15 March 2018 / Revised: 30 March 2018 / Accepted: 4 April 2018 / Published: 5 April 2018
(This article belongs to the Section Physical Sensors)
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Abstract

A fully integrated sensor interface for a wide operational temperature range is presented. It translates the sensor signal into a pulse width modulated (PWM) signal that is then converted into a 12-bit digital output. The sensor interface is based on a pair of injection locked oscillators used to implement a differential time-domain architecture with low sensitivity to temperature variations. A prototype has been fabricated using a 180 nm partially depleted silicon-on-insulator (SOI) technology. Experimental results demonstrate a thermal stability as low as 65 ppm/°C over a large temperature range from −20 °C up to 220 °C. View Full-Text
Keywords: high temperature; sensor interface; time-domain; injection locked oscillators high temperature; sensor interface; time-domain; injection locked oscillators
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Chabchoub, E.; Badets, F.; Mailly, F.; Nouet, P.; Masmoudi, M. A Temperature-Hardened Sensor Interface with a 12-Bit Digital Output Using a Novel Pulse Width Modulation Technique. Sensors 2018, 18, 1107.

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