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Maria-Alexandra Paun

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Publications associées (61)

High-Frequency 3-D Model for the Study of Antennas in Cochlear Implants

Maria-Alexandra Paun

2018

Fractal Analysis Of Neuroimagistics. Lacunarity Degree, A Precious Indicator In The Detection Of Alzheimer'S Disease

Maria-Alexandra Paun

The fractal dimension and lacunarity measurements of neuro-images were leveraged to differentiate between benign, biphasic and lacunarity tissue samples. For various benign and malignant subtypes, using the program developed by the authors, the fractal dim ...

UNIV POLITEHNICA BUCHAREST, SCI BULL2018

Multi-analysis and modeling of asymmetry offset for Hall effect structures

Maria-Alexandra Paun

The topological (asymmetry) offset voltage of CMOS cross-like Hall cells is analyzed in this paper. In order to attain the stated objective, different approaches have been considered. Both circuit and three-dimensional models have been developed. Variation ...

Elsevier Science Bv2017

Main Parameters Characterization of Bulk CMOS Cross-Like Hall Structures

Maria-Alexandra Paun

A detailed analysis of the cross-like Hall cells integrated in regular bulk CMOS technological process is performed. To this purpose their main parameters have been evaluated. A three-dimensional physical model was employed in order to evaluate the structu ...

2016

Regular Bulk CMOS Hall Effect Sensors Employment in Solid-State Power and Energy Meters

Maria-Alexandra Paun

This paper is intended to present an advanced technique to be used in solid-state power and energy meters, more specifically through the employment of the Hall effect sensors. From a qualitative point of view, an investigation into the sensing device is pe ...

Elsevier Science Bv2016

SOI Hall cells design selection using three-dimensional physical simulations

Florin Udrea, Maria-Alexandra Paun

The main characteristics of Hall Effect Sensors, based on "silicon-on-insulator" (SOI) structure in the ideal design features, are evaluated by performing three-dimensional physical simulations. A particular Hall shape reproducing an XFAB SOI XI10 integrat ...

Elsevier2014

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

Hall Cells Offset Analysis and Modeling Approaches

Maria-Alexandra Paun

The Hall Effect sensors are one of the most commonly used sensing technologies today. They are employed in many applications for direct magnetic field sensing and serve a multitude of low power applications within automotive and industrial electronics as c ...

EPFL2013

Temperature considerations on Hall Effect sensors current-related sensitivity behaviour

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

The present paper focuses on evaluating the temperature effects on Hall Effect sensors sensitivity behavior. To this purpose, an analysis of the factors affecting the sensors current-related sensitivity is performed, consisting of several pertinent conside ...

Springer US2013

A Circuit Model for CMOS Hall Cells Performance Evaluation including Temperature Effects

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

In order to provide the information on their Hall voltage, sensitivity, and drift with temperature, a new simpler lumped circuit model for the evaluation of various Hall cells has been developed. In this sense, the finite element model proposed by the auth ...

Hindawi Publishing Corporation2013

Comparative Study on the Performance of Five Different Hall Effect Devices

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

Five different Hall Effect sensors were modeled and their performance evaluated using a three dimensional simulator. The physical structure of the implemented sensors reproduces a certain technological fabrication process. Hall voltage, absolute, current-r ...

Mdpi Ag2013

Offset And Drift Analysis Of The Hall Effect Sensors. The Geometrical Parameters Influence

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

Several Hall sensor configurations have been integrated in CMOS 0.35 mu m technology and analyzed in terms of offset at room temperature and offset drift. We searched for the best geometry that would minimize the offset and its corresponding drift. The tar ...

Inst Materials Physics2012

Temperature Influence Investigation on Hall Effect Sensors Performance Using a Lumped Circuit Model

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

In order to provide the information on their Hall voltage, sensitivity and drift with temperature, a new simpler lumped circuit model for the evaluation of various Hall Effect sensors has been developed. In this sense, the finite element model associated c ...

IEEE2012

Fast algorithm for blind optimization of optical systems. Statistics and methodology

Maria-Alexandra Paun

Adaptive Optics (AO) improves the efficiency of the optical devices in confocal imaging systems by reducing wavefront aberrations. Aberration is caused by imperfections within the system and reduces the optical signal to noise ratio of the resultant images ...

Natl Inst Optoelectronics2012

Geometrical parameters influence on the Hall effect sensors offset and drift

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

Several Hall sensor configurations have been integrated in CMOS technology and analyzed in terms of offset at room temperature and offset drift. We looked for the best geometry that would minimize the offset and its drift. The targeted specification was 30 ...

IEEE2011

Hall effect sensors performance investigation using three-dimensional simulations

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

Several Hall effect sensors were modeled and evaluated regarding the Hall voltage and sensitivity using 3D physical simulations. For accurate results the numerical offset and its temperature drift were analyzed. The versatility of the simulation allows var ...

2011

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

Implications Of Scale Relativity In Gravitational And Electromagnetic Field Theory

Maria-Alexandra Paun

A non-differentiable mechanical model (an alternative to Nottale's Scale Relativity Theory) considering that the particles movements takes place on Peano fractal curves is built. A Navier-Stokes type equation with an imaginary viscosity coefficient for a c ...

2010

Internal Friction Phenomena at Polymeric and Metallic Shape Memory Materials. Experimental and Theoretical Results

Maria-Alexandra Paun

The internal friction phenomenon in metallic and polymeric shape memory materials is analyzed. The experimental results permit validation of a theoretical model which describes qualitatively the temperature dependence of the internal friction for the inves ...

2010

Thermal Properties of Nanofilled and Microfilled Restorative Composites

Maria-Alexandra Paun

The thermal properties of nanofilled and microfilled restorative composites (Filtek Supreme XT and Filtek Z250) are studied in comparison with the ones of teeth. Our results show slightly decreased values of the thermal constants of Filtek Supreme XT with ...

2009

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