Publications by Maher Kayal | EPFL Graph Search

Related publications (162)

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

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

High-Speed Power System Stability Simulation Using Analog Computation

Maher Kayal, Sidi-Rachid Cherkaoui, Laurent Fabre, Ira Nagel

This paper introduces a microelectronic emulation approach for high-speed power system computation. First, the problems of existing power system simulators are detailed. This shows that microelectronic emulation is a possible solution for the speed problem ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

A miniaturised autonomous sensor based on nanowire materials platform: the SiNAPS mote

Maher Kayal, Naser Khosro Pour

A micro-power energy harvesting system based on core(crystalline Si)-shell(amorphous Si) nanowire solar cells together with a nanowire-modified CMOS sensing platform have been developed to be used in a dust-sized autonomous chemical sensor node. The mote ( ...

Spie-Int Soc Optical Engineering2013

Cooperative energy management of a community of smart-buildings: A Blockchain approach

Maher Kayal, Olivier Valentin Henri Van Cutsem

Demand Response (DR) is progressively moving from a centralized, unidirectional structure to a set of advanced decentralized mechanisms that better balance distributed supply and demand. This paper presents a decentralized cooperative DR framework to manag ...

ELSEVIER SCI LTD2020

CMOS Demodulation Image Sensor for Nanosecond Optical Waveform Analysis

Maher Kayal

An image sensor with 256 x 256 pixels and a pitch of 6.3 mu m, suitable for resolving ultrashort optical phenomena, is developed. It is based on a standard CMOS process with pinned photodiode option. The pixel comprises three transfer gates to allow versat ...

Institute of Electrical and Electronics Engineers2013

Methodology for 3-D Substrate Network Extraction for SPICE Simulation of Parasitic Currents in Smart Power ICs

Maher Kayal, Jean-Michel Sallese, Camillo Stefanucci, Pietro Buccella

A 3-D simulation of substrate currents is crucial to analyze parasitic coupling effects due to minority carrier injection in smart power ICs. In this paper, a substrate parasitic extraction methodology is introduced by dividing the IC layout into elementar ...

Ieee-Inst Electrical Electronics Engineers Inc2016

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

A Reliability and Efficiency Optimization System for Hard-Switching DC/DC Converters

Maher Kayal, Adil Koukab, Giacomo Ripamonti

The Large Hadron Collider experiments at CERN will use power distribution schemes relying on integrated buck DC/DC converters. Due to the radiation-hardness requirements, the devices used for the development of such converters will have a voltage rating wh ...

IEEE2018

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

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

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

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

Global 2D modeling of minority and majority substrate coupled currents

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

This paper presents a modeling strategy to simulate 2D propagation of electrical perturbations induced by direct biasing of substrate junctions. Identifying parasitic substrate devices such as bipolar transistors reaches rapidly its limit when multiple cur ...

2009

A novel approach to high-speed high-resolution on-chip mass sensing

Maher Kayal, Marc Pastre, Christian Kauth

The state-of-the-art mass sensing so far has been rather developed along the resolution axis, reaching atomic-scale detection, than into the direction of high-speed. This paper reports a novel self-calibrating technique, making high-speed inertial mass sen ...

Elsevier Sci Ltd2014

A Fully Integrated Hall Sensor Microsystem for Contactless Current Measurement

Maher Kayal, Marc Pastre, Andrea Ajbl

Contactless current measurement based on Hall-effect sensors can be performed in either closed-or open-loop configuration. In this paper an open-loop sensor system with a current-mode output is described. The system measures the magnetic field induced arou ...

Ieee2012

JouleSense: A Simulation based Platform for Proactive Feedback on Building Occupants' Energy Use

Maher Kayal, Georgios Lilis

A significant amount of energy in the buildings can be saved by inducing efficient occupant behavior. The occupant's awareness tools that have been shown to be effective in achieving energy efficiency gains depend on various computational and estimation al ...

Scitepress2016

An Ultra-High Speed Emulator Dedicated to Power System Dynamics Computation Based on a Mixed-Signal Hardware Platform

Maher Kayal, Sidi-Rachid Cherkaoui, Laurent Fabre, Ira Nagel, Guillaume Olivier Lanz, Theodoros Kyriakidis, Denis Sallin

This paper presents an ultra-high speed hardware platform dedicated to power system dynamic (small signal) and transient (large signal) stability. It is based on an intrinsic parallel architecture which contains hybrid mixed-signal (analog and digital) cir ...

IEEE Institute of Electrical and Electronics Engineers2013

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

Structured design based on the inversion factor parameter: Case study of ΔΣ modulator system

Maher Kayal, Marc Pastre, Danica Stefanovic

This paper presents the design flow from system-level specifications to transistor-level design for three different fully-differential amplifiers composing the first and the second integrator of a second-order hybrid multi-bit ΔΣ modulator. The circuit-lev ...

2007

Micro-beamer based on MEMS micro-mirrors and laser light source

Maher Kayal, Laurent Fabre, Nicolas Abelé, Christophe Winter, Fabrizio Lo Conte

This paper presents a complete portable laser-based projection system using two one-dimensional magnetic actuated MEMS linear scanning micro-mirrors. Dedicated high speed electronics was developed to drive the MEMS, detect the mirror scanning position at a ...

Elsevier Science, Reg Sales Off, Customer Support Dept, 655 Ave Of The Americas, New York, Ny 10010 Usa2009

Comparison of MPC Formulations for Building Control under Commercial Time-of-Use Tariffs

Maher Kayal

Most medium and large commercial buildings in the U.S. are subject to complex electricity tariffs that combine both Time-of-Use (TOU) energy and demand charges. This study analyses the performances of different economic Model Predictive Control (MPC) formu ...

IEEE2019