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François Krummenacher

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Publications associées (55)

OTA-C based high-speed analog processing for real-time fault location in electrical power networks

Maher Kayal, François Krummenacher, François Pierre Gaugaz

This paper explores the potential and limitations of analog integrated circuit techniques for the simulation of low-loss or lossless 1D or 2D transmission mediums. In this approach, a transmission line is mapped into a ladder consisting of N identical LC e ...

Springer Verlag2016

Design and Measurement Methodology for a Sub-picoampere Current Digitiser

Maher Kayal, François Krummenacher, Evgenia Voulgari

This paper introduces some design and measurement techniques that were used in the design and the testing of an ASIC for ultra-low current sensing. The idea behind this paper is to present the limitations in sub-picoampere current measurements and demonstr ...

Ieee2015

Simple thermal noise estimation of OTA-based switched-capacitor filters

Christian Enz, François Krummenacher, Assim Boukhayma

This paper presents a new analytical method to simply estimate the integrated thermal noise in switched-capacitor filters (SCF). It is shown how the Bode theorem, which is theoretically valid only for continuous-time passive filters, can be extended to als ...

2015

Component design and testing for a miniaturised autonomous sensor based on a nanowire materials platform

Maher Kayal, François Krummenacher, Mihai Adrian Ionescu, Montserrat Fernandez-Bolanos Badia, Naser Khosro Pour, Elizabeth Buitrago Godinez

We present the design considerations of an autonomous wireless sensor and discuss the fabrication and testing of the various components including the energy harvester, the active sensing devices and the power management and sensor interface circuits. A com ...

Springer2014

High-Speed Power System Transient Stability Simulation Using Highly Dedicated Hardware

Sidi-Rachid Cherkaoui, Maher Kayal, François Krummenacher, Marc Pastre, Laurent Fabre, Ira Nagel

This paper presents a fully analog demonstrator based on power system emulation for high-speed power system stability analysis.Abenchmark using a fixed two-machine topology has been implemented. The characteristics of the emulated components (i.e., generat ...

IEEE Institute of Electrical and Electronics Engineers2013

Measurement and Compact Modeling of 1/f Noise in HV-MOSFETs

Matthias Bucher, François Krummenacher, Jean-Michel Sallese, Antonios Bazigos

This paper investigates 1/f noise behavior under low and high drain biases of high-voltage metal-oxide-semiconductor field-effect transistors (MOSFETs) (HV-MOSFETs). A dedicated setup is presented which allows measuring low-frequency (LF) noise of lateral ...

Ieee-Inst Electrical Electronics Engineers Inc2013

A 120 dB dynamic-range radiation-tolerant charge-to-digital converter for radiation monitoring

Maher Kayal, François Krummenacher, Bernd Dehning

We present a radiation-tolerant 120 dB dynamic-range interface circuit for ionization chambers and diamond detectors. The device consists of a multi-scale continuous-time incremental charge-to-digital converter paired with a temperature-compensated current ...

Elsevier2013

An ultra-low power energy-efficient microsystem for hydrogen gas sensing applications

Maher Kayal, François Krummenacher, Naser Khosro Pour

This paper presents a fully integrated power management and sensing microsystem that harvests solar energy from a micro-power photovoltaic module for autonomous operation of a miniaturized hydrogen sensor. In order to measure H-2 concentration, conductance ...

Springer US2013

Fully integrated ultra-low power management system for micro-power solar energy harvesting applications

Maher Kayal, François Krummenacher, Naser Khosro Pour

A fully integrated, area-efficient and ultra-low power management system for micro-power solar energy harvesting applications is proposed. This system harvests energy from miniaturised solar cells connected in series to charge a rechargeable microbattery. ...

Institution of Engineering and Technology2012

RF Compact Modeling of High-voltage MOSFETs

Matthias Bucher, François Krummenacher, Jean-Michel Sallese, Antonios Bazigos

The High-Voltage MOSFET is used in a wide variety of applications covering from power systems up to RF-IC. Compact models that describe the high-frequency behavior of the device are required to predict high-frequency operation and switching capabilities of ...

Medknow Publications2012

Tunable floating active inductor with internal offset reduction

Sidi-Rachid Cherkaoui, Maher Kayal, François Krummenacher, Marc Pastre, Laurent Fabre, Ira Nagel

Presented is a transistor-level implementation of a floating and tunable CMOS active inductor. It is based on the classical gyrator-C topology and is enhanced by adding an internal offset reduction mechanism to guarantee functionality also for unbalanced D ...

2012

A Miniaturized Autonomous Microsystem for Hydrogen Gas Sensing Applications

Maher Kayal, François Krummenacher, Naser Khosro Pour

This paper presents a fully integrated, ultra-low power microsystem that is used for hydrogen gas sensing in an autonomous wireless sensor node. The proposed circuit harvests solar energy from a micro-power photovoltaic module to measure temperature and hy ...

Ieee2012

Towards circuit design using VeSFETs

Maher Kayal, François Krummenacher, Jean-Michel Sallese, Marc Pastre, Lucian Barbut

This paper explores the potential of VeFETs for mixed-signal circuits. A new physics-based compact DC model of the VeSFET operated in subthreshold region is presented and used to derive 1st-order sensitivities of the device threshold voltage to process var ...

2011

A Physics-Based Analytical Compact Model for the Drift Region of the HV-MOSFET

Matthias Bucher, François Krummenacher, Jean-Michel Sallese, Antonios Bazigos

This paper presents a novel physics-based analytical compact model for the drift region of a high-voltage metal-oxide-semiconductor field-effect transistor (HV-MOSFET). According to this model, the drift region is considered as a simple 1-D problem, just a ...

2011

CAD tools for fast analysis of parasitic coupling and mismatch effects in switched-capacitor circuits

Maher Kayal, François Krummenacher, Sylvain Maréchal

This paper presents a switched-capacitor simulator, optimized for fast computations. Two CAD tools are implemented in order to perform Monte-Carlo simulations, to identify sensitive parasitic coupling prior to layout and to rapidly verify parasitic couplin ...

IEEE2011

A 20-bit dynamic range CMOS A/D converter for ionization chambers

Maher Kayal, François Krummenacher, Bernd Dehning

We present the design of a wide dynamic-range CMOS A/D interface circuit for ionization chambers, able to digitize input charge of both polarities over six decades, to operate in a radioactive environment, and foreseen working without calibration. The circ ...

IEEE2011

Optimal filtering of an incremental second-order MASH11 sigma-delta modulator

Maher Kayal, François Krummenacher, Sylvain Maréchal

This paper describes an optimal filter design procedure for a cascaded sigma-delta modulator, starting with a block schematic of a second-order topology and deriving step by step the optimal decoder. The presented filter enhances the resolution of the MASH ...

IEEE2011

A circuit-level substrate current model for smart-power ICs

Maher Kayal, François Krummenacher, Jean-Michel Sallese, Marc Pastre, Fabrizio Lo Conte

This paper presents a new modeling methodology accounting for generation and propagation of minority carriers that can be used directly in circuit-level simulators in order to estimate coupled parasitic currents. The method is based on a new compact model ...

Institute of Electrical and Electronics Engineers2010

Global modeling strategy of parasitic coupled currents induced by minority-carrier propagation in semiconductor substrates

Maher Kayal, François Krummenacher, Jean-Michel Sallese, Marc Pastre, Fabrizio Lo Conte

This paper presents a modeling strategy to simulate the propagation of electrical perturbations induced by direct biasing of substrate junctions. Usually, this is done by identifying parasitic substrate devices such as bipolar transistors. However, mapping ...

2010

Spectral and polarimetric characterization of the Gas Pixel Detector filled with dimethyl ether

François Krummenacher

The Gas Pixel Detector belongs to the very limited class of gas detectors optimized for the measurement of X-ray polarization in the emission of astrophysical sources. The choice of the mixture in which X-ray photons are absorbed and photoelectrons propaga ...

2010

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