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Maher Kayal

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Publications associées (162)

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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

SOI Pixel Based on a Floating Body Partially Depleted MOSFET in a Delta-Sigma Loop

Maher Kayal, Jean-Michel Sallese

Standard techniques used for measuring the photocurrent of an SOI phototransistor have failed due to two main reasons: the first being the low signal-to-noise ratio and the second being the slow transient. In this paper, the partially depleted silicon on i ...

Institute of Electrical and Electronics Engineers2009

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

Towards circuit design using VeSFETs

Maher Kayal, Jean-Michel Sallese, François Krummenacher, 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

Optimization Strategy of Numerical Simulations Applied to EPFL Substrate Model

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

A new methodology for modeling minority carriers diffusion in Smart Power ICs substrate using standard circuit simulators has been proposed by EPFL. For this purpose, a parasitic substrate network consisting of lumped elements is extracted from the circuit ...

Ieee2014

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

Maher Kayal, François Krummenacher, Evgenia Voulgari

2018

Optimization of shielded PCB air-core toroids for high efficiency dc-dc converters

Maher Kayal

The paper describes the design of optimized PCB air-core toroids for high frequency DC-DC converters with strict requirements in terms of volume and noise. The effect of several design parameters on the overall inductor volume, on DC and AC winding resista ...

2009

Geometry influence on the Hall effect devices performance

Maher Kayal, Jean-Michel Sallese, Maria-Alexandra Paun

The influence of the geometry, via the ratio L/W of the Hall cells and the geometrical correction factor G on several figures of merit regarding Hall sensors is analyzed, namely the sensitivity, Hall Voltage and power dissipated within the device. Experime ...

2010

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

Maher Kayal, François Krummenacher

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

9 MHz vibrating body FET tuning fork oscillator

Mihai Adrian Ionescu, Maher Kayal, Fabrizio Lo Conte

A 9.4MHz micro-electromechanical oscillator based on a Vibrating Body Field Effect Transistor (VB-FET) is presented in this work. The tuning fork VB-FET used in this work provides a high quality factor of 9400 in the open-loop configuration and a low equiv ...

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

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

Maher Kayal, François Krummenacher, Evgenia Voulgari

2017

SOI hall-sensor front end for energy measurement

Maher Kayal

The growing demand for the solid-state meters for power and energy measurement leads to the fully integrated Hall-sensor-based microsystem solutions. In this paper, a silicon-on-insulator (SOI) Hall-sensor-based. microsystem for energy measurements with dy ...

2006

Meshing strategy of equivalent substrate schematic in SMART power IC

Maher Kayal, Jean-Michel Sallese, Fabrizio Lo Conte

In this paper, a modeling methodology able to create an equivalent schematic of an High-Voltage integrated circuit is developed. The equivalent schematic is based on enhanced model of diodes and resistances, accounting for minority and majority carrier pro ...

IEEE2011

Experimental Investigation of Flow Instabilities and Rotating Stall in a High-Energy Centrifugal Pump Stage

François Avellan, Maher Kayal, Mohamed Farhat, Philippe Dupont, Laurent Fabre

In centrifugal pumps, the interaction between the rotating impeller and the stationary diffuser generates specific pressure fluctuation patterns. When the pump is operated at off design conditions, these pressure fluctuations increase. The resulting rise o ...

ASME2009

Analysis of Substrate Currents Propagation in HVCMOS technology

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

This work reports the results of a layout-aware substrate modeling methodology for HVCMOS technologies. The model relies on the extraction of parasitic substrate network to simulate with circuit software parasitic lateral NPN bipolar transistors with multi ...

IEEE2016

Computing the Impact of White and Flicker Noise in Continuous-Time Integrator-Based ADCs

Maher Kayal, Adil Koukab, Paul Stanislas Gosselin

From first-order incremental Sigma Delta converters to controlled-oscillator-based converters, many ADC architectures are based on the continuous-time integration of the input signal. However, the accuracy of such converters cannot be properly estimated wi ...

Ieee2016

Measurement and Performance Evaluation of a Silicon On Insulator Pixel Matrix

Maher Kayal, Jean-Michel Sallese

A new technique for driving silicon-on-insulator pixel matrixes has been proposed in [1], which was based on transient charge pumping for evacuating the extra photogenerated charges from the body of the transistor. An 8x8 pixel matrix was designed and fabr ...

2010

Active Guard Ring Characterization for Smart Power ICs

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

This paper shows SPICE simulation results of active guard ring structures which are typically employed in Smart Power ICs. Active guard rings act as barriers limiting the flow of minority carriers injected into the substrate toward sensitive circuits. The ...

Ieee2016

Optimization of DC-DC Converters for Improved Electromagnetic Compatibility With High Energy Physics Front-End Electronics

Maher Kayal

The upgrade of the Large Hadron Collider (LHC) experiments at CERN sets new challenges for the powering of the detectors. One of the powering schemes under study is based on DC-DC buck converters mounted on the front-end modules. The hard environmental con ...

Institute of Electrical and Electronics Engineers2011

A dynamic supply CMOS RF power amplifier for 2.4GHz and 5.2GHz frequency bands

Maher Kayal, Cédric Meinen

An implementation of a dynamic supply RF power amplifier (PA) in 0.11 mu m CMOS technology occupying a total area of 1.35mm(2) is presented. Two-tone measurement results at 2.4 and 5.2GHz show that the system can deliver over 16dBm linear output power with ...

2006