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

Emna Chabchoub1,2,3, Franck Badets4, Frédérick Mailly5

  • 1Grenoble Alpes University, CEA, LETI, F-38000 Grenoble, France. emnachabchoubchb@gmail.com.

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|April 6, 2018
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Summary
This summary is machine-generated.

This study presents an integrated sensor interface using injection locked oscillators for stable digital output across wide temperature ranges. The novel design achieves excellent thermal stability for reliable sensor signal processing.

Keywords:
high temperatureinjection locked oscillatorssensor interfacetime-domain

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Area of Science:

  • Integrated circuit design
  • Sensor signal processing
  • Electronic instrumentation

Background:

  • Traditional sensor interfaces often struggle with accuracy over wide temperature variations.
  • Developing robust interfaces is crucial for reliable data acquisition in diverse environments.

Purpose of the Study:

  • To present a fully integrated sensor interface with a wide operational temperature range.
  • To demonstrate low sensitivity to temperature variations using a novel architecture.

Main Methods:

  • Utilized a differential time-domain architecture based on injection locked oscillators.
  • Implemented a sensor signal to pulse width modulated (PWM) signal conversion.
  • Fabricated a prototype using 180 nm silicon-on-insulator (SOI) technology.

Main Results:

  • Achieved a 12-bit digital output from the sensor interface.
  • Demonstrated exceptional thermal stability of 65 ppm/°C.
  • Validated performance over an extensive temperature range from -20 °C to 220 °C.

Conclusions:

  • The presented sensor interface offers high thermal stability and a wide operational range.
  • The injection locked oscillator-based design provides a robust solution for sensor signal conditioning.
  • This technology is suitable for applications requiring reliable measurements in extreme temperatures.