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Maher Kayal

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Publications associées (165)

A dynamic operation of a PIN photodiode

Maher Kayal, Serguei Okhonin, Alexander Tagantsev, Marc Pastre, Adil Koukab, Denis Sallin, Maxim Gureev, Alexander Kvasov

Traditionally, photodiodes operate at static reverse bias, and incident light intensity is obtained from the relatively week photocurrent. In this paper, we introduce a different concept of photodiode function: the photodiode is used in a dynamic regime wh ...

American Institute of Physics2015

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

Spice Simulation of Passive Protection in Smart Power ICs

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

When designing in Smart Power technologies, TCAD simulations are mandatory to design effective passive protections against parasitic couplings due to minority carriers. The objective of this paper is to propose a spice-based approach to characterize electr ...

Ieee2015

Modeling Parasitic Vertical PNP in HVCMOS

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

High voltage CMOS active devices inherently have a parasitic vertical bipolar transistor. The parasitic PNP structure can be activated during high-power switching operation causing a potential shift of the substrate. In this work a spice-modeling approach ...

IEEE2015

Silicon-on-Insulator Technology for Bioluminescence Imaging and Application to a Switching Photodetector

Maher Kayal, Adil Koukab, Denis Sallin, Nisrina Abdo

This paper analyzes some advantages of Silicon-on-Insulator (SOI) based photodetectors for bioluminescence imaging. It shows that SOI based sensors not only solve the bulk carriers problem, it can also act as a very selective spectral filter by acting as a ...

Ieee2015

Modeling Minority Carriers Related Capacitive Effects for Transient Substrate Currents in Smart Power ICs

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

This paper presents an extended model for transient and ac circuit-level simulation of minority carriers propagation through the substrate of smart power integrated circuits (ICs). A p-n junction and a diffusion resistor with capacitive components are prop ...

Institute of Electrical and Electronics Engineers2015

Toward direct light-to-digital conversion using a pulse-driven hybrid MOS-PN photodetector

Maher Kayal, Adil Koukab, Denis Sallin

In this Letter, a direct light-to-digital converter based on an MOS-PN photodetector driven by pulsed voltage is presented. The objective is to avoid any analog-to-digital or time-to-digital conversion and, thereby, to pave the way for a new generation of ...

Optical Society of America2015

Spice-compatible modeling of high injection and propagation of minority carriers in the substrate of Smart Power ICs

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

Classical substrate noise analysis considers the silicon resistivity of an integrated circuit only as doping dependent besides neglecting diffusion currents as well. In power circuits minority carriers are injected into the substrate and propagate by drift ...

Elsevier2015

Mixed-signal power system emulator extension to solve unbalanced fault transient stability analysis

Sidi-Rachid Cherkaoui, Maher Kayal, Guillaume Olivier Lanz, Theodoros Kyriakidis

This paper presents the extension of a platform originally devoted to symmetrical transient stability analysis, into the domain of unbalanced faults. The aim of this solver is to increase the speed of dynamic stability assessment for power systems. It is b ...

IEEE2014

Simultaneous High-Speed High-Resolution Nanomechanical Mass Sensing

Maher Kayal, Marc Pastre, Christian Kauth

Mass sensing has so far rather developed along the resolution axis, reaching atomic-scale detection, than into the direction of high speed. This letter reports on a novel self-calibrating technique that makes high-speed inertial mass sensors capable of ins ...

Institute of Electrical and Electronics Engineers2014

Impact of enhanced contact doping on minority carriers diffusion currents

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

Minority carriers diffusion currents are particularly important in parasitic substrate couplings of Smart Power ICs. In CMOS technologies the P-substrate potential is imposed by P+ contacts and N-wells by N+ highly doped implantations. The doping concentra ...

IEEE2014

Pipelined Numerical Integration on Reduced Accuracy Architectures for Power System Transient Simulations

Sidi-Rachid Cherkaoui, Maher Kayal, Guillaume Olivier Lanz, Theodoros Kyriakidis, Georgios Lilis

This work concerns a dedicated mixed-signal power system dynamic simulator. The equations that describe the behavior of a power system can be decoupled in a large linear system that is handled by the analog part of the hardware, and a set of differential e ...

IEEE2014

MOS-PN Hybrid Device With Minimum Dark Current for Sensitive Digital Photodetection

Maher Kayal, Adil Koukab, Denis Sallin

This letter presents a CMOS-compatible photodetector displaying direct light-to-time conversion and intrinsic charge integration with a very low dark current. This device is particularly adapted for applications requiring high sensitivity such as biolumine ...

Institute of Electrical and Electronics Engineers2014

A Novel Technique for Online Partial Discharge Pattern Recognition in Large Electrical Motors

Maher Kayal

In this paper, a fully automated system for source detection of the partial discharges (PD) as an online diagnosis test in rotating machineries is proposed. This technique uses a modified version of the Expectation Maximization-based (EM) clustering techni ...

Ieee2014

Optimization Strategy of Numerical Simulations Applied to EPFL Substrate Model

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

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

Spice Simulation of Substrate Minority Carriers Propagation with Equivalent Electrical Circuit

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

This paper presents an equivalent electrical circuit for one dimensional substrate minority carriers spice simulation. The electrical circuit parameters are extracted from substrate meshing applying the finite difference method. This model is derived from ...

Ieee2014

On the effect of integration algorithms on reduced accuracy computational architectures

Sidi-Rachid Cherkaoui, Maher Kayal, Guillaume Olivier Lanz, Theodoros Kyriakidis, Georgios Lilis

2014

Evaluation of characteristic parameters for high performance hall cells

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

The current work focuses on presenting specific Hall cells with high performance, and their corresponding parameters. The design, integration, measurements and model development for their performance assessment are necessary stages considered in the genera ...

Elsevier Sci Ltd2014

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

Hybrid MOS-PN photodiode with positive feedback for pulse-modulation imaging

Maher Kayal, Adil Koukab, Denis Sallin

A new type of CMOS compatible photodetector, exhibiting intrinsic light-to-time conversion, is proposed. Its main objective is to start the time-to-digital conversion directly at its output, thereby avoiding the cumbersome analog processing. The operation ...

Optical Society of America2014

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