Caracterisation des dispositifs hyperfrequences : schema equivalent, facteur de bruit et impedance optimale de bruit PDF Download
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Author: Frederic Barberousse
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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Author: Frédéric Barberousse
Publisher:
ISBN:
Category :
Languages : fr
Pages : 188
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Book Description
CE MEMOIRE EST CONSACRE A LA CARACTERISATION ET A LA MODELISATION HYPERFREQUENCE DU BRUIT DE FOND DANS LES TRANSISTORS A EFFET DE CHAMP A HETEROJONCTION DE TYPE PSEUDOMORPHIQUE (PHEMT) SUR SUBSTRAT GAAS ET INP. SUR LES TRANSISTORS PHEMT (SUBSTRAT INP), NOUS ETUDIERONS L'EVOLUTION DU SCHEMA EQUIVALENT ET LES QUATRE PARAMETRES DE BRUIT EN FONCTION DE LA LARGEUR ET DE LA TOPOLOGIE DE GRILLE (GRILLE EN T, 4 ET 8 DOIGTS DE GRILLE). APRES UNE MESURE DES CARACTERISTIQUES I-V DES DISPOSITIFS, NOUS PRESENTONS DANS LE DEUXIEME CHAPITRE LA TECHNIQUE EXPERIMENTALE PERMETTANT D'OBTENIR LES QUATRE PARAMETRES DE BRUIT AINSI QUE LES RESULTATS OBTENUS. NOUS MONTRONS QUE LE TRANSISTOR PHEMT SUR INP PRESENTAIT UN FACTEUR DE BRUIT MINIMUM MOINS ELEVE ET UN COURANT DE DRAIN OPTIMUM PLUS GRAND QUE LE TRANSISTOR PHEMT SUR GAAS. L'ETUDE EN FONCTION DES PARAMETRES GEOMETRIQUES DE GRILLE A PERMIS DE DEFINIR LA STRUCTURE OPTIMALE EN CE QUI CONCERNE LE COMPORTEMENT EN BRUIT. UNE TELLE CARACTERISATION ETANT DELICATE A METTRE EN UVRE, NOUS AVONS CHERCHE A MODELISER LES QUATRE PARAMETRES DE BRUIT AFIN DE POUVOIR LES PREDIRE. LES METHODES CLASSIQUES NECESSITANT, EN PLUS DE LA CONNAISSANCE PRECISE DU SCHEMA EQUIVALENT ET AU MOINS D'UNE MESURE DE BRUIT, IL NOUS A SEMBLE INTERESSANT DE DEVELOPPER UN MODELE NE FAISANT APPEL QU'A LA CONNAISSANCE DU SCHEMA EQUIVALENT. LES RESULTATS OBTENUS PAR CE MODELE SONT EN PARFAIT ACCORD AVEC LES MESURES EFFECTUEES AUSSI BIEN EN FONCTION DE LA FREQUENCE QUE DE LA POLARISATION
Author: Frederic Barberousse
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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Author: Paolo Mele
Publisher:
ISBN: 9781536160864
Category : Zinc oxide thin films
Languages : en
Pages : 0
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Book Description
Zinc oxide (ZnO) is an n-type semiconductor with versatile applications such as optical devices in ultraviolet region, piezoelectric transducers, transparent electrode for solar cells and gas sensors. This book "ZnO Thin Films: Properties, Performance and Applications" gives a deep insight in the intriguing science of zinc oxide thin films. It is devoted to cover the most recent advances and reviews the state of the art of ZnO thin films applications involving energy harvesting, microelectronics, magnetic devices, photocatalysis, photovoltaics, optics, thermoelectricity, piezoelectricity, electrochemistry, temperature sensing. It serves as a fundamental information source on the techniques and methodologies involved in zinc oxide thin films growth, characterization, post-deposition plasma treatments and device processing. This book will be invaluable to the experts to consolidate their knowledge and provide insight and inspiration to beginners wishing to learn about zinc oxide thin films.
Author: Rebecca Hampl
Publisher: Christian Faith Publishing, Inc.
ISBN: 1098051017
Category : Fiction
Languages : en
Pages : 533
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Book Description
At the age of twenty-eight, Marty Ellis is still a bachelor who graduated with a major in journalism and a minor in photojournalism. He enjoys his life with various girlfriends while knocking back drinks in bars, going out to dinner, and rolling in the sheets. Yet inevitably, he grows tired of these surface-level-only feelings, shells out his standard goodbye speech, and moves on. However, using only his body and saying sayonara to his love lifeaEUR(tm)s revolving door is not how he wants to live for the rest of his life. How will he ever know what true love feels like if he doesnaEUR(tm)t ascertain how to actually give it? In what way will he begin to be able to discover the whole package that runs beneath the surface of a woman? Unexpectedly, Marty is blindsided when his best friend invites him to leave New Jersey for a weekend trip. Lauren Morris is a beautiful thirty-two-year-old woman who, after graduating at the age of twenty-one with a masteraEUR(tm)s degree in business, took a huge leap of faith and purchased an old farmhouse in Vermont. After ten years of hard work and sweat equity, she has transformed it into a beautiful inn that has become extremely lucrative. But winter is fast approaching, and she is dreading that feeling of loneliness that is connected to darkened afternoons and long, empty nights. Will a man ever enter her life? One that she could love and perhaps be with until death due them part? After meeting Marty, Lauren begins to consider if this man might be the one she has been waiting for her whole life. But then again, she is older than he is; long distance relationships hardly ever work out; and sudden heartbreaking unforeseen events rock both of their worlds. And if they do fall in love, which one of them will have to make the ultimate sacrifice and give up what theyaEUR(tm)ve worked so hard to achieve in order to be together? With so many changes causing so many challenges, will they get through them together, or will one push the other away?
Author: Georgios B. Giannakis
Publisher: John Wiley & Sons
ISBN: 047146287X
Category : Technology & Engineering
Languages : en
Pages : 488
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Book Description
Eine vielversprechende Technologie zur Maximierung der Bandbreiteneffizienz in der breitbandigen drahtlosen Kommunikation ist die Raum-Zeit-Kodierung. Theorie und Praxis verbindend, ist dieses Buch die erste umfassende Diskussion von Grundlagen und designorientierten Aspekten von Raum-Zeit-Codes. Single-Carrier und Multi-Carrier-Übertragungen für Einzel- und Mehrnutzerkommunikation werden behandelt.
Author: Miroslav Chomat
Publisher: BoD – Books on Demand
ISBN: 9533075481
Category : Technology & Engineering
Languages : en
Pages : 278
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Book Description
The subject of this book is an important and diverse field of electric machines and drives. The twelve chapters of the book written by renowned authors, both academics and practitioners, cover a large part of the field of electric machines and drives. Various types of electric machines, including three-phase and single-phase induction machines or doubly fed machines, are addressed. Most of the chapters focus on modern control methods of induction-machine drives, such as vector and direct torque control. Among others, the book addresses sensorless control techniques, modulation strategies, parameter identification, artificial intelligence, operation under harsh or failure conditions, and modelling of electric or magnetic quantities in electric machines. Several chapters give an insight into the problem of minimizing losses in electric machines and increasing the overall energy efficiency of electric drives.
Author: F Lasnier
Publisher: CRC Press
ISBN: 9780852743119
Category : Science
Languages : en
Pages : 576
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Book Description
The Photovoltaic Engineering Handbook is the first book to look closely at the practical problems involved in evaluating and setting up a photovoltaic (PV) power system. The author's comprehensive knowledge of the subject provides a wealth of theoretical and practical insight into the different procedures and decisions that designers need to make. Unique in its coverage, the book presents technical information in a concise and simple way to enable engineers from a wide range of backgrounds to initiate, assess, analyze, and design a PV system. It is beneficial for energy planners making decisions on the most appropriate system for specific needs, PV applications engineers, and anyone confronting the practical difficulties of setting up a PV power system.
Author: Rentsen Enkhbat
Publisher: Springer Nature
ISBN: 303141229X
Category : Mathematics
Languages : en
Pages : 202
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Book Description
This volume gathers selected, peer-reviewed works presented at the 7th International Conference on Optimization, Simulation and Control, ICOSC 2022, held at the National University of Mongolia, Ulaanbaatar, June 20–22, 2022. Topics covered include (but are not limited to) mathematical programming; network, global, linear, nonlinear, parametric, stochastic, and multi-objective optimization; control theory; biomathematics; and deep and machine learning, to name a few. Held every three years since 2002, the ICOSC conference has become a traditional gathering for experienced and young researchers in optimization and control to share recent findings in these fields and discuss novel applications in myriad sectors. Researchers and graduate students in the fields of mathematics, engineering, and computer science can greatly benefit from this book, which can also be enjoyed by advanced practitioners in research laboratories and the industry. The 2022 edition of the ICOSC conference was sponsored by the Mongolian Academy of Sciences, the National University of Mongolia and the German-Mongolian Institute for Resources and Technology.
