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Dissertations / Theses on the topic 'PCM switches'

Author: Grafiati

Published: 26 August 2023

Last updated: 31 July 2025

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1

Buckley, Dave. "Optimising Networked Data Acquisition for Smaller Configurations." International Foundation for Telemetering, 2013. http://hdl.handle.net/10150/579528.

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ITC/USA 2013 Conference Proceedings / The Forty-Ninth Annual International Telemetering Conference and Technical Exhibition / October 21-24, 2013 / Bally's Hotel & Convention Center, Las Vegas, NV<br>Network switches are a critical component in any networked FTI data acquisition system in order to allow the forwarding of data from the DAU to the target destination devices such as the network recorder, PCM gateways, or ground station. Larger configurations require one or more switch boxes to handle aggregation, routing, filtering and synchronization via the IEEE 1588 Precision Time Protocol. Ho

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2

Le, Gall Nicolas. "Etude et optimisation de composants radiofréquences à base de matériaux à changement de phase." Electronic Thesis or Diss., Limoges, 2023. http://www.theses.fr/2023LIMO0096.

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Les composants radiofréquences sont des éléments clefs dans les systèmes de télécommunications modernes. Les commutateurs par exemple, permettent de laisser passer, ou non, le signal électrique. Il en existe différentes technologies, comme les transistors, les relais électromécaniques ou les MEMS RF. L'utilisation de matériaux à changement de phase permet le développement de composants miniaturisés à la fois performants et bistables. Ces matériaux n'ayant été que récemment intégrés dans le domaine des hautes fréquences, il convient d'étudier cette famille de composants et de modéliser au mieux

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3

Laouini, Mariem. "Conception, simulation et mesures de différents circuits reconfigurables utilisant des commutateurs MEMS RF et des commutateurs à matériaux à changement de phase (PCM)." Electronic Thesis or Diss., Limoges, 2023. https://aurore.unilim.fr/theses/nxfile/default/15037a69-5484-4258-a2c0-9a2beb9183c1/blobholder:0/2023LIMO0020.pdf.

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Ce manuscrit représente les travaux de thèse qui traitent principalement la conception des commutateurs MEMS RF pour des circuits reconfigurables. Une solution qui résout le problème du phénomène de piégeage dans le diélectrique des commutateurs a été proposée en utilisant le diélectrique Ta/Ta2O5. Ce commutateur MEMS RF, fonctionnant à une fréquence de 20 GHz, a bien démontré un fonctionnement fiable sans l’apparition du phénomène de chargement du diélectrique. Il a également donné une grande valeur de capacité de 350 fF et un contraste capacitif élevé de 7. Ces composants ont été ensuite int

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4

Mennai, Amine. "Conception et réalisation de commutateurs RF à base de matériaux à transition de phase (PTM) et à changement de phase (PCM)." Thesis, Limoges, 2016. http://www.theses.fr/2016LIMO0035/document.

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Ces travaux de recherche portent sur la conception et la réalisation de commutateurs RF basées sur l’intégration de matériaux innovants fonctionnels tels que le dioxyde de vanadium (VO2) et les alliages de chalcogénures de types Ge2Sb2Te5 (GST) et GeTe. Le principe de fonctionnement de ces composants repose sur le changement de résistivité que présentent ces matériaux. Le VO2 possède une transition Isolant-Métal (MIT) autour de 68°C à travers laquelle le matériau passe d’un état isolant (forte résistivité) à un état métallique (faible résistivité). La transition MIT présente l’intérêt de pouvo

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5

Wong, Heymian. "PCI Express multi-root switch reconfiguration during system operation." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/66819.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 66-67).<br>As the use of data continues to expand, reliance on enterprise datacenters have become more and more critical. Evaluation of modern day datacenter performance has showed that datacenter servers are severely underutilized, resulting in inefficient use of physical and software resources. In order to alleviate these concerns, datacenters must improve their resiliency, flexibility and scal

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6

Kotte, Hari Babu. "High Speed (MHz) Switch Mode Power Supplies (SMPS) using Coreless PCB Transformer Technology." Licentiate thesis, Mittuniversitetet, Institutionen för informationsteknologi och medier, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-13964.

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The most essential unit required for all the electronic devices is the Power Supply Unit (PSU). The main objective of power supply designers is to reduce the size, cost and weight, and to increase the power density of the converter. There is also a requirement to have a lower loss in the circuit and hence in the improvement of energy efficiency of the converter circuit. Operating the converter circuits at higher switching frequencies reduces the size of the passive components such as transformers, inductors, and capacitors, which results in a compact size, weight, and increased power density o

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7

Kadwani, Pankaj. "Pulsed Tm-Fiber Laser for Mid-IR Generation." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5955.

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Thulium fiber lasers have attracted interest based on their long emission wavelength and large bandwidth (~1.8 – 2.1 &"181;m) relative to more established ytterbium and erbium fiber lasers. In addition, Tm:fiber lasers offer the potential for high efficiencies (~60 %) and high output power levels both in cw as well as pulsed regimes. These attributes are useful particularly in applications such as remote sensing, materials processing and mid-infrared generation. This dissertation describes the development of novel nanosecond pulsed thulium fiber laser systems with record high peak power levels

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8

Hariri, Ahmad. "Etude de commutateurs hyperfréquences bistables à base des matériaux à changement de phase (PCM)." Thesis, Limoges, 2019. http://www.theses.fr/2019LIMO0013/document.

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Les travaux présentés dans ce manuscrit portent sur la conception, simulation et réalisation des nouvelles structures des commutateurs hyperfréquences basées sur l’intégration des couches minces des matériaux innovants fonctionnels tels que les matériaux à changement de phase (PCM) et les matériaux à transition de phase (PTM). Le principe de fonctionnement de ces composants repose sur le changement de résistivité présenter par ces matériaux. Nous avons exploité le changement de résistivité réversible du GeTe de la famille des matériaux à changement de phase (PCM) entre les deux états : amorphe

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9

Ambatipudi, Radhika. "Multilayered Coreless Printed Circuit Board (PCB) Step-down Transformers for High Frequency Switch Mode Power Supplies (SMPS)." Licentiate thesis, Mittuniversitetet, Institutionen för informationsteknologi och medier, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-13967.

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The Power Supply Unit (PSU) plays a vital role in almost all electronic equipment. The continuous efforts applied to the improvement of semiconductor devices such as MOSFETS, diodes, controllers and MOSFET drivers have led to the increased switching speeds of power supplies. By increasing the switching frequency of the converter, the size of passive elements such as inductors, transformers and capacitors can be reduced. Hence, the high frequency transformer has become the backbone in isolated AC/DC and DC/DC converters. The main features of transformers are to provide isolation for safety purp

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10

Mocevic, Slavko. "PCB-Embedded Phase Current Sensor and Short-Circuit Detector for High Power SiC-Based Converters." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/84348.

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Nowadays, major public concern is concentrated on reducing the usage of fossil fuels and reducing emissions of CO2 by different energy advancement. Electric vehicle technology presents extremely effective way of reducing carbon emissions and paves the way of having sustainable and renewable energy future. In order to wear the cost of electric vehicles down, batteries have to be improved as well as higher power density and high reliability has to be achieved. This research work mainly focuses on achieving higher power density and higher reliability of the inverter stage by utilizing wide-bandga

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11

Giordani, Marco. "Integrazione tra Sistemi di Autenticazione Dipartimentale e d'Ateneo." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8974/.

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Il documento illustra il lavoro di analisi dei requisiti, progettazione, implementazione e valutazione di un sistema per l’autenticazione degli utenti delle workstation della sede di Scienze del Dipartimento di Informatica — Scienza ed Ingegneria (DISI) che si integri al sistema di autenticazione d’Ateneo. Il sistema descritto è entrato in produzione il 24 settembre 2014 ed è tuttora operante. Il lavoro percorre le modalità di gestione degli account utente in uso presso il DISI e le nuove modalità di organizzazione del DSA d’Ateneo discutendo le motivazioni per cui le soluzioni standard non p

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12

Lindström, Alexander. "GMPLS multi-layer networking Routing and constraint-based path computation in optical network segments." Thesis, KTH, Kommunikationssystem, CoS, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-91939.

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In recent years, IP based end-to-end services have grown in popularity. Efficiently meeting the user demand for such services, different techniques for traffic engineering transport networks have been developed. One such technique, currently being developed for multilayered networks, is Generalized Multi-Protocol Label Switching (GMPLS). GMPLS is a necessary networking technique because provisioning end-to-end services will today, and in the foreseeable future, very likely require the co-operation of multiple network layers. Here, the readiness of GMPLS for optical networks is investigated by

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13

Moozhikkal, Rahul. "Design of Resonant Converters using Silicon Carbide Power." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-201662.

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The design of series-loaded resonant converters using the state of the art SiC power transistorsis investigated in the thesis. SiC devices are chosen as they offer lower switching losses comparedto conventional Si based devices A very detailed study about the working and differentmodes of operation of the resonant converter is carried out. The thesis further explains how thehigh speed switching capabilities of the SiC devices remain untapped owing to the presence ofstray inductances in the switch-snubber layout. A comparison of all the commercially availableSiC devices are carried out to find

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14

Jang, Kyoung-Jin. "Mitochondrial function provides instructive signals for activation-induced B cell fates." Kyoto University, 2015. http://hdl.handle.net/2433/199208.

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15

Almustafa, Mohamad. "Modélisation des micro-plasmas, conception des circuits micro-ondes, Coupleur Directionnel Hybride pour Mesures et des applications en Télécommunication." Phd thesis, Toulouse, INPT, 2013. http://oatao.univ-toulouse.fr/14170/1/almustafa.pdf.

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L'intégration des nouveaux éléments basés sur la physique des plasmas dans le domaine des circuits et des systèmes micro-ondes est l'objectif de ce travail. En profitant des caractéristiques électromagnétiques des plasmas et en jouant sur leur architecture, on développe des micro-commutateurs micro-ondes et d'autres circuits radio et hyperfréquences en technologies microrubans ou en guide d'onde… La simulation de la propagation des ondes électromagnétiques dans un plasma et les études de l'interaction entre un plasma et les ondes électromagnétiques nécessite la connaissance des paramètres fond

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16

Johansson, Simon. "Design of power supplies for Piezo LEGS and SiC experiment : KTH Student satellite MIST." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-196216.

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KTH is funding a project whose goal is to send a satellite into space. This project is called MIST (Miniature Student Satellite) which is assembled by a team of students at KTH. On the satellite there are experiments that are invented by other teams, in two of those experiments a power supply is required. This thesis is a technical investigation on how to design the power supply to both of those experiments, which are called SiC and Piezo LEGS. Piezo LEGS will investigate how their nanosized motors will behave and function in a space environment. SiC will investigate how their silicone carbide

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17

Flagar, Vojtěch. "Měření veličin ve stavebních konstrukcích." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316251.

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This paper deals with the hardware and software design of the data acquisition distributed system with large amount of connected sensors. The intended application of this work is measuring some physical quantities in the building constructions. The designed system is hierarchically divided into the three levels. On the highest level there is a single-board computer Raspberry Pi which is used as a master on RS-485 bus. There can be up to 32 slave devices on the bus while each of them collects data from the sensors connected to 4-channel I2C bus. At the same time the Raspberry Pi is used as a we

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18

Vecchiola, Aymeric. "Développement d’une imagerie de résistance électrique locale par AFM à pointe conductrice en mode contact intermittent." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112058/document.

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Le microscope à force atomique (AFM) permet de caractériser avec une excellente résolution spatiale les surfaces d’échantillons de différentes natures et peut être mis en œuvre dans des milieux variés. Cette versatilité a favorisé le développement d’un grand nombre de techniques dérivées, destinées à investiguer diverses propriétés physiques locales. Le LGEP a ainsi réalisé un module, le Résiscope, capable de mesurer la résistance électrique locale à la surface d’un échantillon polarisé en continu, sur une gamme de 11 décades. Mise au point en mode contact, où la pointe exerce en permanence un

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19

YANG, YI-CHENG, and 楊毅成. "Switched-capacitor filters for PCM CODEC system." Thesis, 1986. http://ndltd.ncl.edu.tw/handle/72579877090958301577.

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20

Tseng, Po-Hsiang, and 曾博祥. "Two-Switch PCCM Buck Converter." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/23327193030934007585.

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碩士<br>國立臺灣海洋大學<br>電機工程學系<br>103<br>In this thesis, we consider the design and simulation of a pseudo-continuous conduction mode (PCCM) buck converter. Two switches are used to implement the PCCM operation.Simulation results verify the beneifit of the used PCCM buck converter.

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21

"PCI Express-based Ethernet Switch." Master's thesis, 2012. http://hdl.handle.net/2286/R.I.14662.

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abstract: A new type of Ethernet switch based on the PCI Express switching fabric is being presented. The switch leverages PCI Express peer-to-peer communication protocol to implement high performance Ethernet packet switching. The advantages and challenges of using the PCI Express as the switching fabric are addressed. The PCI Express is a high-speed short-distance communication protocol largely used in motherboard-level interconnects. The total bandwidth of a PCI Express 3.0 link can reach as high as 256 gigabit per second (Gb/s) per 16 lanes. Concerns for PCI Express such as buffer speed, a

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