Technique des courants commutes pour les convertisseurs a sur-echantillonage ou sous-echantillonnage PDF Download
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Author: Omid Oliaei
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Author: Omid Oliaei
Publisher:
ISBN:
Category :
Languages : fr
Pages :
Get Book Here
Book Description
Author: Omid Oliaei
Publisher:
ISBN:
Category :
Languages : fr
Pages : 280
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Book Description
L'EVOLUTION DES TECHNOLOGIES DE FABRICATION DE CIRCUITS INTEGRES A FAIT APPARAITRE L'IDEE DE SYSTEME SUR UNE PUCE. BIEN QUE LA PLUS GRANDE PARTIE DU TRAITEMENT DU SIGNAL EST EFFECTUEE DANS LE DOMAINE NUMERIQUE, UN PASSAGE ANALOGIQUE-NUMERIQUE DANS UN SYSTEME COMPLET DE TRAITEMENT DU SIGNAL EST INEVITABLE. CELA ENTRAINE LA NECESSITE DE COEXISTENCE DES CIRCUITS ANALOGIQUES ET NUMERIQUES SUR UNE MEME PUCE. LA TECHNIQUE DES COURANTS COMMUTES A ETE PRESENTEE COMME UNE ALTERNATIVE AUX CAPACITES COMMUTEES DANS L'OPTIQUE D'INTEGRER LES CIRCUITS ANALOGIQUES EN TEMPS-DISCRET DANS UNE TECHNOLOGIE VLSI STANDARD. CE TRAVAIL DE THESE EST CONSACRE A L'ETUDE DE LA TECHNIQUE DES COURANTS COMMUTES POUR LA CONVERSION ANALOGIQUE-NUMERIQUE A SURECHANTILLONNAGE OU SOUSECHANTILLONNAGE. DANS LA PREMIERE PARTIE DE LA THESE, CETTE TECHNIQUE A ETE ABORDEE DANS LE CONTEXTE DE LA CONVERSION ANALOGIQUE-NUMERIQUE SIGMA-DELTA. L'ATTENTION PARTICULIERE EST PORTEE AU DEVELOPPEMENT ET A LA CARACTERISATION DE BLOCS ELEMENTAIRES A COURANTS COMMUTES. L'ETUDE DES CIRCUITS A COURANTS COMMUTES A FAIT NAITRE AUSSI DES CIRCUITS EN TEMPS CONTINU COMME CONVOYEUR DE COURANT, MULTIPLIEUR DE COURANT ET DIVISEUR DE COURANT. LA DEUXIEME PARTIE CONCERNE LES CONVERTISSEURS ANALOGIQUESNUMERIQUES PARALLELES. L'ETUDE EFFECTUEE MONTRE QUE L'INCORPORATION DE CONVERTISSEURS ANALOGIQUESNUMERIQUES DANS UN BANC DE FILTRES HYBRIDE PERMET AUX CONVERTISSEURS DE FONCTIONNER A UNE FREQUENCE PLUS BASSE QUE LA FREQUENCE DE NYQUIST. L'UTILISATION DU BANC DE FILTRES HYBRIDE AURA POUR AVANTAGE L'AUGMENTATION DE LA VITESSE DES CONVERTISSEURS CLASSIQUES. UNE DISCUSSION SUR LES RESULTATS DE MESURE, OBTENUS A PARTIR DES CIRCUITS REALISES DANS UNE TECHNOLOGIE CMOS 0,5M, TERMINE LE DOCUMENT.
Author:
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Category : Telecommunication
Languages : en
Pages : 540
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Author:
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ISBN:
Category : Electric circuits
Languages : en
Pages : 834
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Author: Mourad Loulou
Publisher:
ISBN:
Category :
Languages : fr
Pages : 194
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Book Description
APRES AVOIR DONNE LES BASES DE LA TECHNIQUE DES COURANTS COMMUTES COMME PRINCIPE DE CONCEPTION DE FONCTIONS ANALOGIQUES, LES FONDEMENTS DE LA CONVERSION ANALOGIQUE-NUMERIQUE SIGMA-DELTA SONT EXPLIQUES : SUR-ECHANTIONNAGE AVEC MISE EN FORME DU BRUIT DE QUANTIFICATION DANS LE MODULATEUR PUIS OBTENTION DE LA RESOLUTION SOUHAITEE GRACE AU FILTRAGE NUMERIQUE A DECIMATION. LES INTEGRATEURS SONT LES PIECES MAITRESSES DU MODULATEUR ; APRES AVOIR DECRIT DES SOLUTIONS POSSIBLES POUR REALISER CETTE FONCTION DEUX INTEGRATEURS ORIGINAUX SONT PROPOSES DANS LESQUELS LES DEFAUTS SONT COMPENSES NOTAMMENT L'INJECTION DE CHARGE. LORS DE LA CONCEPTION, L'ETAPE DE SIMULATION, PROBLEME DELICAT POUR LES CIRCUITS A TEMPS DISCRET, EST RESOLU PAR DEUX APPROCHES COMPLEMENTAIRES L'UNE FONCTIONNELLE, L'AUTRE COMPORTEMENTALE. ENFIN, DEUX REALISATIONS DE MODULATEURS DU SECOND ORDRE SONT DECRITES, ELLES PERMETTENT D'ATTEINDRE DES RESOLUTIONS DE 9 ET 10 BITS. LA SECONDE A DONNE LIEU A UNE CHAINE DE CONVERSION ANALOGIQUE-NUMERIQUE A SORTIE PARALLELE SUR 12 BITS.
Author: U.S. Atomic Energy Commission
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 26
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Author: Domenico Delli Gatti
Publisher: Springer Science & Business Media
ISBN: 9783540669791
Category : Business & Economics
Languages : en
Pages : 312
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Book Description
This book is a collection of essays which examine how the properties of aggregate variables are influenced by the actions and interactions of heterogenous individuals in different economic contexts. The common denominator of the essays is a critique of the representative agent hypothesis. If this hypothesis were correct, the behaviour of the aggregate variable would simply be the reproduction of individual optimising behaviour. In the methodology of the hard sciences, one of the achievements of the quantum revolution has been the rebuttal of the notion that aggregate behaviour can be explained on the basis of the behaviour of a single unit: the elementary particle does not even exist as a single entity but as a network, a system of interacting units. In this book, new tracks in economics which parallel the developments in physics mentioned above are explored. The essays, in fact are contributions to the analysis of the economy as a complex evolving system of interacting agents.
Author: Jean-Marie Basset
Publisher: John Wiley & Sons
ISBN: 3527627103
Category : Science
Languages : en
Pages : 725
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Book Description
Covering everything from the basics to recent applications, this monograph represents an advanced overview of the field. Edited by internationally acclaimed experts respected throughout the community, the book is clearly divided into sections on fundamental and applied surface organometallic chemistry. Backed by numerous examples from the recent literature, this is a key reference for all chemists.
Author: North Atlantic Treaty Organization
Publisher: CreateSpace
ISBN: 9781482679441
Category : Reference
Languages : en
Pages : 450
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Book Description
NATO Glossary of terms and definitions (English and French). Listing terms of military significance and their definitions for use in NATO.
Author: Marc Sommers
Publisher: University of Georgia Press
ISBN: 0820338907
Category : Political Science
Languages : en
Pages : 310
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Book Description
Young people are transforming the global landscape. As the human population today is younger and more urban than ever before, prospects for achieving adulthood dwindle while urban migration soars. Devastated by genocide, hailed as a spectacular success, and critiqued for its human rights record, the Central African nation of Rwanda provides a compelling setting for grasping new challenges to the world's youth. Spotlighting failed masculinity, urban desperation, and forceful governance, Marc Sommers tells the dramatic story of young Rwandans who are “stuck,” striving against near-impossible odds to become adults. In Rwandan culture, female youth must wait, often in vain, for male youth to build a house before they can marry. Only then can male and female youth gain acceptance as adults. However, Rwanda's severe housing crisis means that most male youth are on a treadmill toward failure, unable to build their house yet having no choice but to try. What follows is too often tragic. Rural youth face a future as failed adults, while many who migrate to the capital fail to secure a stable life and turn fatalistic about contracting HIV/AIDS. Featuring insightful interviews with youth, adults, and government officials, Stuck tells the story of an ambitious, controlling government trying to govern an exceptionally young and poor population in a densely populated and rapidly urbanizing country. This pioneering book sheds new light on the struggle to come of age and suggests new pathways toward the attainment of security, development, and coexistence in Africa and beyond. Published in association with the United States Institute of Peace
