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A − 40 to 250 °C Triple Modular Redundancy Temperature Sensor for Turbofan Engines

Abstract : Turbofan engines using distributed control architecture require sensors and electronic instrumentation located in the engine compartment to simplify system design, improve reliability, and ease signal multiplexing. Designing a wide range temperature sensor which works reliably regardless of process variation can be extremely challenging. Using a bandgap-like topology with PiN diodes as the sensing element, this work proposes a -40 to 250 °C temperature sensor in the IMS 0.35 μm SOI technology. To circumvent the process variation challenge, a triple modular redundancy is proposed for the sensing element combined with a weighted voter and digital circuitry calibration. The proposed sensing element supplies the analog-to-digital conversion (ADC) with a V REF having a typical-mean temperature coefficient of 62 ppm/°C, 24 ppm/°C for the best corner, and 213 ppm/°C for the worst corner. An average VCTAT sensitivity is estimated at 0.282 mV/°C among all corners. After a 2-point temperature calibration, the ADC quantization step presented a negligible variation over temperature, approximately 1.0 mV among all corners, assuring a 0.28 °C of temperature inaccuracy.
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https://hal.archives-ouvertes.fr/hal-01868264
Contributor : Pietro Maris Ferreira Connect in order to contact the contributor
Submitted on : Wednesday, September 5, 2018 - 11:53:01 AM
Last modification on : Saturday, December 4, 2021 - 4:04:18 AM

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Pietro Maris Ferreira, Martin Schaeffer, Adel Mezaour, Olivier Petit, Caroline Lelandais-Perrault, et al.. A − 40 to 250 °C Triple Modular Redundancy Temperature Sensor for Turbofan Engines. 2018 31st Symposium on Integrated Circuits and Systems Design (SBCCI), Aug 2018, Bento Gonçalves, Brazil. ⟨10.1109/sbcci.2018.8533226⟩. ⟨hal-01868264⟩

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