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Book Description
LA PREMIERE PARTIE A ETE CONSACREE A L'EVALUATION DU COEFFICIENT DE DIFFUSION D(E) DANS L'ASGA-N PAR L'INTERMEDIAIRE DE LA MESURE DES TEMPERATURES DE BRUIT EN REGIME DE PORTEURS CHAUDS. NOUS AVONS ENSUITE, DEVELOPPE UNE NOUVELLE VERSION DE LA METHODE DU CHAMP D'IMPEDANCE QUI A ETE APPLIQUEE A DES DIODES N#+NN#+ ASGA. LES RESULTATS THEORIQUES ONT ETE CONFRONTES A L'EXPERIENCE A T=300K. DANS LA SECONDE PARTIE, NOUS AVONS DONNE UNE PRESENTATION DU SIMULATEUR ELECTRIQUE SPICE 2G. A L'AIDE DE CE LOGICIEL NOUS AVONS ENSUITE, FAIT UNE SIMULATION ELECTRIQUE DES TRANSISTORS BIPOLAIRES SI, LES RESULTATS DE LA SIMULATION ONT ETE COMPARES A L'EXPERIENCE. POUR FINIR CETTE PARTIE, UNE ETUDE EXPERIMENTALE POUR DETERMINER LES QUATRE PARAMETRES DE BRUIT A ETE FAITE
Book Description
LA PREMIERE PARTIE A ETE CONSACREE A L'EVALUATION DU COEFFICIENT DE DIFFUSION D(E) DANS L'ASGA-N PAR L'INTERMEDIAIRE DE LA MESURE DES TEMPERATURES DE BRUIT EN REGIME DE PORTEURS CHAUDS. NOUS AVONS ENSUITE, DEVELOPPE UNE NOUVELLE VERSION DE LA METHODE DU CHAMP D'IMPEDANCE QUI A ETE APPLIQUEE A DES DIODES N#+NN#+ ASGA. LES RESULTATS THEORIQUES ONT ETE CONFRONTES A L'EXPERIENCE A T=300K. DANS LA SECONDE PARTIE, NOUS AVONS DONNE UNE PRESENTATION DU SIMULATEUR ELECTRIQUE SPICE 2G. A L'AIDE DE CE LOGICIEL NOUS AVONS ENSUITE, FAIT UNE SIMULATION ELECTRIQUE DES TRANSISTORS BIPOLAIRES SI, LES RESULTATS DE LA SIMULATION ONT ETE COMPARES A L'EXPERIENCE. POUR FINIR CETTE PARTIE, UNE ETUDE EXPERIMENTALE POUR DETERMINER LES QUATRE PARAMETRES DE BRUIT A ETE FAITE
Book Description
CE MEMOIRE DE THESE S'INSCRIT DANS LE CADRE GENERAL DE L'ETUDE EN BRUIT DES COMPOSANTS ACTIFS DANS LE DOMAINE DES MICRO-ONDES ET DU MILLIMETRIQUE. LE NIVEAU DE BRUIT GENERE PAR UN TRANSISTOR ASSOCIE A SES PERFORMANCES DYNAMIQUES VONT DETERMINER SES LIMITES DE FONCTIONNEMENT. DE PLUS, L'ETUDE DU BRUIT DU DISPOSITIF EST UNE SOURCE IMPORTANTE D'INFORMATIONS RELATIVES AUX MECANISMES PHYSIQUES IMPLIQUES. CES INFORMATIONS POURRONT ETRE EXPLOITEES PAR LE TECHNOLOGUE QUI OPTIMISE LA STRUCTURE DU COMPOSANT. LA CARACTERISATION EN BRUIT CONSISTE FONDAMENTALEMENT A DETERMINER LES 4 PARAMETRES DE BRUIT DU COMPOSANT. ELLE IMPLIQUE LA MISE EN UVRE DE METHODES SPECIFIQUES DE MESURE ET D'EXTRACTION. CEPENDANT, LES TECHNIQUES D'EXTRACTION PROPOSEES POUR L'OBTENTION DES PARAMETRES DE BRUIT ONT DES LIMITATIONS. AINSI, LES METHODES DE MESURE DE BRUIT SOUS 50 OHMS POUR LES TRANSISTORS A EFFET DE CHAMP NE SONT PAS UTILISEES DANS LE CAS DES COMPOSANTS BIPOLAIRES. PAR AILLEURS, LES METHODES EXISTANTES SONT DIFFICILEMENT APPLICABLES A LA MESURE DE DISPOSITIFS REFROIDIS SITUES DANS UN ENVIRONNEMENT CRYOGENIQUE. LA NOUVELLE APPROCHE PROPOSEE ET DEVELOPPEE DANS CETTE THESE EST UNE ALTERNATIVE AUX METHODES STANDARDS PUISQU'ELLE AUTORISE L'ETUDE DE TOUS TYPE DE COMPOSANT ET QUE LES PRINCIPES ET LE BANC SUR LESQUELS ELLE EST BASEE PERMETTENT DES MESURES DE BRUIT A BASSE TEMPERATURE. NOUS PRESENTONS DANS CE MEMOIRE (QUI SE VEUT ETRE AUSSI UN OUTIL DE TRAVAIL), LES PRINCIPES ET LE DEVELOPPEMENT DE CETTE NOUVELLE METHODE DE CARACTERISATION EN BRUIT DE COMPOSANTS ACTIFS. IL CONTIENT DONC LES BASES NECESSAIRES A LA COMPREHENSION DES MESURES DES 4 PARAMETRES DE BRUIT, EXPOSE LA METHODOLOGIE ASSOCIEE, DONNE LA PROCEDURE A SUIVRE POUR LA MISE EN PLACE D'UN BANC DE MESURE DE BRUIT ET SA VALIDATION A TRAVERS DES MESURES COMPARATIVES ET UNE MODELISATION DU BANC. ENFIN, CETTE NOUVELLE METHODE EST APPLIQUEE A UNE ETUDE EXTENSIVE DU BRUIT DE TRANSISTORS BIPOLAIRES A HETEROJONCTIONS SUR INP DU CNET BAGNEUX.
Author: Claude Cohen-Tannoudji Publisher: John Wiley & Sons ISBN: 3527345558 Category : Science Languages : en Pages : 790
Book Description
This new, third volume of Cohen-Tannoudji's groundbreaking textbook covers advanced topics of quantum mechanics such as uncorrelated and correlated identical particles, the quantum theory of the electromagnetic field, absorption, emission and scattering of photons by atoms, and quantum entanglement. Written in a didactically unrivalled manner, the textbook explains the fundamental concepts in seven chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications. * Completing the success story: the third and final volume of the quantum mechanics textbook written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë * As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly * Comprehensive: in addition to the fundamentals themselves, the books comes with a wealth of elaborately explained examples and applications Claude Cohen-Tannoudji was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms. Bernard Diu was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics. Franck Laloë was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.
Author: D. Wolf Publisher: Springer Science & Business Media ISBN: 3642876404 Category : Science Languages : en Pages : 344
Book Description
Noise in physical systems - as a consequence of the corpuscular nature of matter - conveys information about microscopic mechanisms determining the macroscopic behavior of the system. Besides being a source of information, noise also represents a source of annoying disturbances which affect information transMission along a physical system. Therefore, noise analysis can promote our insight into the behavior of a physical system, as well as our knowledge of the natural constraints imposed upon physical-information transmission channels and devices. In recent years the continuous scientific and technical interest in noise problems has led to a remarkable progress in the understanding of noise phenomena. This progress is reflected by the rich material presented at the Fifth International Conference on Noise in Physical Systems. The conference papers originally published in these proceedings cover the various aspects of today's noise research in the fields of solid-state devices, l/f-noise, magnetic and superconducting materials, measuring methods, and theory of fluctuations. Each session of the conference was introduced by one or two invited review lectures which are included in these proceedings in full length. The 12 invited papers and more than 40 contributed papers on specific topics (only three of them have been omitted from the proceedings since they will be published elsewhere) provide a comprehensive survey of the current state-of-the-art and recent advances of noise analysis.
Author: Abdelkébir Elamri
Author: Abdelkébir Elamri
Author: VALERIE.. DANELON
Author: Annick Penarier
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Author: United States. National Bureau of Standards
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Author: Claude Cohen-Tannoudji
Author: D. Wolf
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