Maher Kayal

Maher Kayal received M.S. and Ph.D degrees in electrical engineering from the Ecole Polytechnique Fédérale de Lausanne (EPFL, Switzerland) in 1983 and 1989 respectively. He has been with the Electronics laboratories of the Ecole Polytechnique Fédérale de Lausanne (EPFL, Switzerland) since 1990, where he is currently a professor and director of the Energy Management and Sustainability" section. He has published many scientific papers, coauthor of three text books dedicated to mixed-mode CMOS design and he holds eleven patents. His technical contributions have been in the area of analog and Mixed-signal circuits design including highly linear and tunable sensors microsystems, signal processing and green energy management. Prizes and Honors : Electronics Letters journal Premium Award 2013, Outstanding Paper Award? IEEE Mixdes 2013 Basil Papadias paper Award, IEEE Powertech 2013 Best Paper Awards, Mixdes 2013 Best Paper Awards, ICCAS 2012 Outstanding Paper Award- IEEE Mixdes 2012. Poland Section IEEE ED Chapter special award in 2011. Credit Suisse Award for Best Teaching- 2009. The William M. Portnoy Award at the Energy Conversion Congress and Exposition , California Sept 2009. Best Paper Award - IEEE-Mixdes 2009. High Quality Paper - IEEE Power Tech Conference June 2009. Best Paper Award - IEEE-Mixdes 2007. Best Paper Award - IEEE-TTTC International Conference on Automation, Quality and Testing, Robotics - 2006. Best Application Specific Integrated Circuit at the International European Design and Test Conference ED&TC - 1997. Ascom Award for the Best Work in Telecommunication Fields 1990. Publications Books. Books: Methodology for the Digital Calibration of Analog Circuits and Systems, Marc Pastre & Maher Kayal. Springer Publisher- (ISBN 1-4020-4252-3)-2006. Structured Analog CMOS Design, Danica Stefanovic & Maher Kayal. Springer Publisher-(ISBN 978-1-4020-8572-7)-2008. Linear CMOS RF Amplifiers for Wireless Applications, Maher Kayal, Springer Publisher. (ISBN 978-90-481-9360-8)-2010. Coeditor of Microelectronics Education Kluwer Academic Publishers. (ISBN 1-4020-2072-4). -2004.

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EE-331: Electronic circuits and systems I

L'étudiant maîtrise la conception et la mise en oeuvre des circuits et systèmes électroniques sous forme discrète et intégrée

EE-332: Electronic circuits and systems II

L'étudiant maîtrise la conception et la mise en oeuvre des circuits et systèmes électroniques sous forme discrète et intégrée. L'accent est mis sur les applicationb dans le domaine des télécommunications.

EE-336: Electronic circuits and systems

Ce cours présente l'analyse et la conception des circuits et systèmes électroniques sous forme discrète et intégrée. L'accent est mis sur les applications dans le domaine des télécommunications.

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 designed to interface with multiple Ion-Sensitive Field-Effect Transistors (ISFETs) and detect biomarkers like pH, Na+, K+ and Ca2+ in human sweat. The ISFET-ASIC system can allow real-time noninvasive and continuous health monitoring. The ANTIGONE ASIC architecture is based on the current-to-frequency converter through the charge balancing principle. The same front-end can digitize multiple currents produced by four sweat ISFET sensors in time multiplexing. The front-end demonstrates good linearity over a dynamic range that spans from 1 pA up to 500 nA. The consumed energy per conversion is less than 1 J. The chip is programmable and works in eight different modes of operation. The system uses a standard Serial Peripheral Interface (SPI) to configure, control and read the digitally converted sensor data. The chip is controlled by a portable device over Bluetooth Low Energy (BLE) through a Microcontroller Unit (MCU). The sweat sensing system is part of a bigger wearable platform that exploits the convergence of multiparameter biosensors and environmental sensors for personalized and preventive healthcare

2021

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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 manage the daily energy exchanges within a community of Smart-Buildings, in the presence of local Renewable Energy Sources (RES). The proposed algorithm taps into the flexibility of the participants to let them decide of a day-ahead community power profile, and subsequently ensures the forecast tracking during the next day. In practice, the algorithm is fully decentralized by the Blockchain technology, that enables a trusted communication medium among the participants and enforces autonomous monitoring and billing via Smart-Contracts. With such an energy management framework, participating Smart-Buildings can together aim at a common objective, such as carbon-free resources usage or aggregated grid services, without depending on a centralized aggregator/utility. Simulations on realistic Swiss building models demonstrate that nearly all the renewable production resources could be harnessed locally through the presented framework, compared to selfish individual optimization. Under a quadratic cost of grid electricity, the considered community profile could dramatically be flattened, hence avoiding costly peaks at the grid interface. A scalability analysis shows that, considering the current public Ethereum Blockchain, the framework could handle a community size of up to 100 Smart-Buildings.

ELSEVIER SCI LTD2020

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A Dual-Edge Pulsewidth Modulator for Fast Dynamic Response DC-DC Converters

Federico Faccio, Maher Kayal, Adil Koukab, Stefano Michelis, Giacomo Ripamonti

Voltage regulator modules are dc-dc converters that power modern microprocessors. They must exhibit a fast dynamic response, in order to achieve satisfactory regulation performance in spite of the rapid load current variations. The pulsewidth modulator is one of the elements that determine the converter transient response. This letter introduces a dual-edge modulator that outperforms conventional modulation schemes in terms of both small-and large-signal dynamic performances: first, its small-signal transfer function exhibits a phase boost action in the high-frequency range, enabling the design of robust, wide-bandwidth control loops. Furthermore, it introduces a reduced expected delay in response to a large-signal perturbation. The modulator transfer function is derived in this letter using the describing function approach, and it is validated by comparing its predictions to SIMPLIS simulations and to the measured loop transfer function of a synchronous buck converter, designed in a 130 nm CMOS technology.

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2019

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