Publications by Mathieu Yves Hervé Coustans

A Fully Integrated 60 mV Cold-Start Circuit for Single Coil DC-DC Boost Converter for Thermoelectric Energy Harvesting

Maher Kayal, François Krummenacher, Mathieu Yves Hervé Coustans

Harvesting energy from ambient energy sources, such as thermal gradients is one solution to address the dramatic increase in energy consumption of personal electronics. While in the field, energy abundantly available in form of heat. The use of primary cel ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2019

Toward ultra-low power design methodology for frequency generation in the IoT design space

Mathieu Yves Hervé Coustans

Today, the semiconductor industry is feeding our digital world with more and more data coming from compact embedded electronics that are monitoring our environment and feeding analytics for action. Interaction with our digital world is mostly achieved thro ...

EPFL2019

Subthreshold Logic for Low-Area and Energy Efficient True Random Number Generator

Maher Kayal, Stéphane Christian Olivier Terrier, Mathieu Yves Hervé Coustans, Thomas Eberhardt, Laurent Fesquet

This paper discusses the advantages of subthreshold logic for True Random Number Generators (TRNG). In this work, the entropy is modeled, and a lower bound of Shannon's entropy per output bit can quickly be estimated. Thanks to this model, sizing TRNGs in ...

IEEE2018

A 32kHz crystal oscillator leveraging voltage scaling in an ultra-low power 40nA real-time clock

Luca Rossi, Maher Kayal, François Krummenacher, Mathieu Yves Hervé Coustans

In this paper, an ultra-low power consumption crystal oscillator embedded in an RTC module (ASIC and its crystal resonator) is presented. The technique leverages oscillation amplitude and loads capacitance scaling; it incorporates transistor level merging ...

IEEE2018

Variability of Low Frequency Noise and mismatch in CORNER DOPED and standard CMOS technology

Matthias Bucher, Christian Enz, Maher Kayal, François Krummenacher, Farzan Jazaeri, Mathieu Yves Hervé Coustans

IEEE2017

Variability of Low Frequency Noise and mismatch in enclosed-gate and standard nMOSFETs

Matthias Bucher, Mathieu Yves Hervé Coustans

Variability of Low Frequency Noise (LFN) and Random Telegraph Noise (RTN) is an important concern for many analog CMOS integrated circuits. In this paper, transistors with enclosed gate layout are examined and compared with standard layout transistors, wit ...

IEEE2017

A nA Crystal - Less Oscillator for Internet of Things

Maher Kayal, François Krummenacher, Mathieu Yves Hervé Coustans

This work presents an ultra-low power oscillator designed to target different contexts, such as crystal-assisted time keeping, reference oscillator to optimize the always on domain of a microcontroller or wake-up timer. This oscillator enables ultra-low po ...

Ieee2016

A 400 fJ Per-Cycle Frequency Reference for Internet of Things

Maher Kayal, François Krummenacher, Mathieu Yves Hervé Coustans

This work presents an ultra-low power oscillator designed to target different contexts, such as crystal-assisted time keeping, reference oscillator to optimize the always on domain of a microcontroller or wake-up timer. This oscillator enables ultra-low po ...

2016