Etude de convertisseurs de donnees sigma-delta haute resolution

Etude de convertisseurs de donnees sigma-delta haute resolution PDF Author: Laurent Quiquerez
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0

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Etude de convertisseurs de donnees sigma-delta haute resolution

Etude de convertisseurs de donnees sigma-delta haute resolution PDF Author: Laurent Quiquerez
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0

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Étude de convertisseurs de données Sigma-Delta haute résolution

Étude de convertisseurs de données Sigma-Delta haute résolution PDF Author: Laurent Quiquerez
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0

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Ce travail porte sur la conversion de données analogique-numérique à très haute résolution (supérieure à 16 bits). L'objectif est de permettre, à terme, la co-intégration du codeur et de fonctions de traitement numérique complexes. Deux approches utilisant la modulation Sigma-Delta ont été étudiées. La première est basée sur une structure nouvelle présentant une symétrie analogique-numérique et visant une réalisation par la technique des courants commutes. La seconde combine des intégrateurs en temps-continu et en temps-discret, au sein du même modulateur. Ainsi les intégrateurs les plus performants peuvent être réalisés en composants discrets, alors que l'essentiel du codeur est intégré à l'aide de la technique des capacités commutées. Une méthode originale a été mise au point, basée sur la transformation exacte de la partie continue en son équivalent temps-discret, permettant la synthèse d'un tel modulateur. La deuxième de ces approches, paraissant être la plus prometteuse, a été retenue pour la réalisation d'un prototype. Il s'agit d'un modulateur d'ordre 4, dont les deux premiers étages sont réalisés en temps continu. La partie intégrée du modulateur a été fabriquée en technologie CMOS 0,8 micron.

High Resolution Sigma-delta A/D Converter

High Resolution Sigma-delta A/D Converter PDF Author: Melvin Kit Ho Chow
Publisher:
ISBN:
Category :
Languages : en
Pages : 97

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Masters Abstracts International

Masters Abstracts International PDF Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 880

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Alerta

Alerta PDF Author:
Publisher:
ISBN:
Category : Serials
Languages : en
Pages : 1172

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Le Golfe Du Saint-Laurent--petit Océan Ou Grand Estuaire?

Le Golfe Du Saint-Laurent--petit Océan Ou Grand Estuaire? PDF Author: Canada. Department of Fisheries and Oceans
Publisher: Peches Et Oceans Direction Generale Des Communications = Fisheries and Oceans Communications Dir
ISBN:
Category : Science
Languages : fr
Pages : 376

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Book Description
Proceedings of a workshop, the scientific reviews and the contributed papers presented at the symposium. The document presents a brief historical summary of marine research in the Gulf; reports the discussions, conclusions and recommendations of the different working groups on oceanography (physics, biology, chemistry and sedimentology) and on the fishery (fish and invertebrates); then presents the discussions of each multidisciplinary working group, centered around how the St. Lawrence system may be used as a natural laboratory which will contribute to the solution of major long-term problems of conservation of natural resources and of the quality of the environment.

Novel Three-state Quantum Dot Gate Field Effect Transistor

Novel Three-state Quantum Dot Gate Field Effect Transistor PDF Author: Supriya Karmakar
Publisher: Springer Science & Business Media
ISBN: 8132216350
Category : Technology & Engineering
Languages : en
Pages : 147

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Book Description
The book presents the fabrication and circuit modeling of quantum dot gate field effect transistor (QDGFET) and quantum dot gate NMOS inverter (QDNMOS inverter). It also introduces the development of a circuit model of QDGFET based on Berkley Short Channel IGFET model (BSIM). Different ternary logic circuits based on QDGFET are also investigated in this book. Advanced circuit such as three-bit and six bit analog-to-digital converter (ADC) and digital-to-analog converter (DAC) were also simulated.

Geology and Natural Hazards of the Fraser River Delta, British Columbia

Geology and Natural Hazards of the Fraser River Delta, British Columbia PDF Author: John Joseph Clague
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 284

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Book Description
The 16 papers in this volume constitute a summary of recent research on the geological architecture and environment of the Fraser River delta, and the physical and chemical processes operating on it. The first two papers are overviews of the geological and seismic setting of the delta. The next two papers summarize present-day sedimentary environments on the delta. A third group of papers covers the geological architecture, or lithostratigraphy, of the delta and the biological structure or biofacies of the delta. The final group of papers is concerned with natural hazards and environmental issues, including earthquakes, geotechnical stability, and seafloor sediment geochemistry.

Lectures in Isotope Geology

Lectures in Isotope Geology PDF Author: E. Jäger
Publisher: Springer Science & Business Media
ISBN: 3642671616
Category : Science
Languages : en
Pages : 507

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Book Description
Our colleagues from the French-speaking parts of Switzerland - the Suisses romands - and above all the committee of the 3rd Cycle, e Earth Sciences (3 Cycle, Sciences de la Terre) honored us by asking us to give a course on Isotope Geology for the year 1977. The course, entitled Evaluation et Interpretation des Donnees Isotopiques (eval uation and Interpretation of Isotopic Data), was intended to inform earth scientists, graduate and postgraduate, from the western Swiss Universities on the subject of Isotope Geology. Such courses usually consist of two parts: lectures and excursions. Thus, in March 1977, we gave such a two-week course at the Miner alogical Institute of the University of Berne. The first week was devoted essentially to the methods of dating, the second week to the behavior of stable isotopes. In July 1977, on the occasion of an excursion to the Central and Western Alps, we were able to demonstrate our results. Guest professors were invited to make contributions to the course.

The Mediterranean region under climate change

The Mediterranean region under climate change PDF Author: Collectif
Publisher: IRD Éditions
ISBN: 2709922207
Category : Nature
Languages : en
Pages : 736

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Book Description
This book has been published by Allenvi (French National Alliance for Environmental Research) to coincide with the 22nd Conference of Parties to the United Nations Framework Convention on Climate Change (COP22) in Marrakesh. It is the outcome of work by academic researchers on both sides of the Mediterranean and provides a remarkable scientific review of the mechanisms of climate change and its impacts on the environment, the economy, health and Mediterranean societies. It will also be valuable in developing responses that draw on “scientific evidence” to address the issues of adaptation, resource conservation, solutions and risk prevention. Reflecting the full complexity of the Mediterranean environment, the book is a major scientific contribution to the climate issue, where various scientific considerations converge to break down the boundaries between disciplines.