Publications by François Krummenacher

ANTIGONE: A Programmable Energy-Efficient Current Digitizer for an ISFET Wearable Sweat Sensing System

Maher Kayal, François Krummenacher, Evgenia Voulgari

This article describes the design and the characterization of the ANTIGONE (ANalog To dIGital cONvErter) ASIC (Application Specific Integrated Circuit) built in AMS 0.35 m technology for low dc-current sensing. This energy-efficient ASIC was specifically d ...

2021

FOSS EKV2.6 Verilog-A Compact MOSFET Model

Matthias Bucher, Christian Enz, François Krummenacher, Christophe Lallement, Jean-Michel Sallese, Eric Vittoz, Wladyslaw Grabinski

The EKV2.6 MOSFET compact model has had a considerable impact on the academic and industrial community of analog integrated circuit design, since its inception in 1996. The model is available as a free open-source software (FOSS) tool coded in Verilog-A. T ...

IEEE2019

A high sensitivity low-power capacitive front-end for insulin injection pens

Maher Kayal, François Krummenacher, Jean-Baptiste Robert Orhan, François Pierre Gaugaz

A low-power 14-bits first order incremental Analog-to-Digital Converter (ADC) is presented. Based on the charge balancing principle, this switched-capacitor (SC) circuit integrates the input signal multiple times to reach the targeted resolution, linearity ...

ELSEVIER SCI LTD2019

Design of an Energy-Efficient Current-to-Frequency Converter for a Wearable Sensor Platform

Maher Kayal, François Krummenacher, Evgenia Voulgari

This paper presents the design of the ANTIGONE ASIC in AMS 0.35 mu m technology that interfaces with ion-sensitive field effect transistors (ISFETs) to detect biomarkers like pH, Na+ and K+ in human sweat. The ISFET sensors generate a low current dc signal ...

IEEE2019

A programmable low-power ADC interface for an ISFET sweat sensor used in a wearable multi-sensing system

Maher Kayal, François Krummenacher, Evgenia Voulgari

An application specific integrated circuit (ASIC) named ANTIGONE (ANalog To dIGital cONvErter) was designed in AMS 0.35 mu m technology to interface with four Ion-sensitive field-effect transistor (ISFET) sensors and perform real-time monitoring of some bi ...

IEEE2019

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

Characterization of a 9-Decade Femtoampere ASIC Front-End for Radiation Monitoring

Maher Kayal, François Krummenacher, Daniel Perrin, Evgenia Voulgari

An ultra-low current sensing digitizer circuit was designed for radiation monitoring for personnel and environmental safety at CERN. The Ultralow Picoammeter 2 (Utopia 2) ASIC includes some key functionalities like on-chip active leakage current compensati ...

2018

Switched-capacitor high-speed emulator for real-time fault location in electrical power systems

Maher Kayal, François Krummenacher, François Pierre Gaugaz

This research presents a discrete-time transmission line model based on the propagation of travelling waves. In this approach, the transmission line is emulated by means of many interconnected unit delay cells implemented with switched-capacitor (SC) circu ...

SPRINGER2018

Utopia: A Nine Decade Femtoampere Sensitivity Current Digitizer and its Application in Ionizing Radiation Monitoring

Maher Kayal, François Krummenacher, Evgenia Voulgari

2018

Design of a fA wide dynamic range ADC for current sensing

Maher Kayal, François Krummenacher, Evgenia Voulgari

2018

Design of a fA wide dynamic range ADC for current sensing (pg 1, 2018)

Maher Kayal, François Krummenacher, Evgenia Voulgari

2018

High-speed analogue sampled-data signal processing for real-time fault location in electrical power networks

Maher Kayal, François Krummenacher, François Pierre Gaugaz

2018

Ultra High-Speed Hardware Emulator for Real-Time Fault Location in Multi-Conductor Power Systems

Maher Kayal, François Krummenacher, François Pierre Gaugaz

This research presents a transmission line model aimed for the fault location in power systems using a method based on the Electromagnetic Time-Reversal (EMTR). The discrete-time model simulates the waves travelling in the line by means of many unit delays ...

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

A 9-decade current to frequency converter with active leakage compensation

Maher Kayal, François Krummenacher, Daniel Perrin, Evgenia Voulgari

2017

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

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

A front-end ASIC for ionising radiation monitoring with femto-amp capabilities

François Krummenacher, Daniel Perrin, Evgenia Voulgari

An ultra-low leakage current Application Specific Integrated Circuit (ASIC) called Utopia (Ultralow Picoammeter) has been designed and fabricated in AMS 0.35 mu m CMOS, in order to be used as the front-end for ionising radiation monitoring at CERN. It is b ...

Iop Publishing Ltd2016

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

Implementation Guidelines for a Real-Time Fault Location System in Electrical Power Networks

Maher Kayal, François Krummenacher, François Pierre Gaugaz

This paper presents constraints involved in the microelectronic implementation of a transmission line model based on transconductor-capacitor (gm-C) topologies. The presented line model, based on the discretization of a transmission line into a finite numb ...

Ieee2016