Dissertations / Theses on the topic 'Circuits électroniques'
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Zimmermann, Yann. "Modélisation et développement formel de circuits électroniques." Nancy 1, 2006. http://docnum.univ-lorraine.fr/public/SCD_T_2006_0213_ZIMMERMANN.pdf.
Full textElectronics systems become more and more complex and reliability requirements are more and more important. The challenge is to continue to develop more and more complex systems while ensuring correction of systems. Test-based methods are now overtaken by complexity of systems. We suggest using proof and refinement to ensure correction of systems. Proof-based methods are not limited by the complexity of systems. We suggest using the B method and its concept of refinement to simplify the process of modelling and proving. At each refinement step, proof obligations are automatically generated by tools to ensure that the concrete model is correct with respect to the abstract model. This method ensures that the final implementation is correct with respect to the initial abstract model which is the specification. We started by a realistic case study chosen by an industrialist (Volvo) consisting in modelling an access controller for a serial bus. This case study leaded us to define some modelling rules to develop electronic circuits using the B method. We have defined the BHDL language which is the synthesisable level of B and we have implemented translators from BHDL towards VHDL and SystemC. A theoretic study of BHDL has been done defining two semantics for this language and proving the correction for the translation from BDHL to VHDL. Some work has also been done to translate BHDL to ACL2
Darwaz, Khamsa. "Etude expérimentale et en simulation comportementale des"pertes fer"dans des circuits magnétiques de géométrie simple." Lyon, INSA, 1995. http://www.theses.fr/1995ISAL0016.
Full text[Energy losses are constituting one of the principal limitations met with energy transformers and electrical machines construction. In the mean time, electronic converters are imposing new working conditions to magnetic circuits, that classical calculation methods can't easily take into account. The work exposed in this paper is about the development of adapted tools, designed to respond to these new constraints. We have chosen a technical representation that globally describes the dynamic behavior and evaluates iron losses on a circuit scale. The behavioral model used allows us to estimate with a good accuracy the losses in ferromagnetic materials, under various excitation conditions. The simulations are running on persona! computer and calculation time takes about a minute. The parameters used in the mode! are automatically and quickly obtain from UNIX station using a limited number of experimental data. These parameters are calculate once and remain constant throughout the simulations. The conditions and the validity's limits of the described method are evaluate using the mode! Accuracy, obtained by comparing results with a direct measure realised in a laboratory under the most widely encountered electrical conditions. ]
Petitqueux, Aurélia. "Test intégré des circuits séquentiels." Montpellier 2, 2000. http://www.theses.fr/2000MON20133.
Full textTrégon, Bernard. "Evaluation et caractérisation d'une technologie d'assemblage MCM-L pour environnement haute pression forte température (120 MPa, 175°C)." Bordeaux 1, 2002. http://www.theses.fr/2002BOR12580.
Full textThe first part of this study is an analysis of electronics needs for severe environmental conditions, that is pressure/temperature combined stress, and so the different potentials applications domains, The second part establish a liste of degradation modes of assembly materials implied in prototypes manufacture. These protoypes are intend to word under 120Mpa of pressure and 175°C of température. Analytic modelisation of each degradation modes are listed; Then we designed and realised an environmental test bench to study our prototypes. The third part is a theoretical behavioural study of components parts under pressure/temperature combined stress. This study has been completed through an experimental analysis. Finally, the fourth part is an experimental analysis of complete prototypes manufactured for our study. This analysis deals about sturdiness of the electronic funcion, so as about the different assembly options degradations of each protoypes. This analysis has been completed with a simulation study using finite elements method
Gryba, Tadeusz. "Calcul des circuits électroniques VLSI avec optimisation des tolérances." Lille 1, 1985. http://www.theses.fr/1985LIL10081.
Full textCollin, Olivier. "Conception de circuits électroniques par des réseaux de neurones : application au convertisseur analogique numérique." Rennes 1, 1991. http://www.theses.fr/1991REN10117.
Full textSalomé, Pascal. "Etude des décharges électrostatiques dans les circuits MOS submicroniques et optimisation de leurs protections." Lyon, INSA, 1998. http://www.theses.fr/1998ISAL0030.
Full textPhysical phenomena involved during electrostatic discharges (ESD) in submicron CMOS devices are analyzed in this thesis. Several kinds of test (according to standards or not) are used today to quantify the ESD failure threshold level of protection circuit. Ali these models lead to complex voltage and current waveforms which are difficult to understand and to study. Therefore, a pulse generator based on the transmission line principle has been developed and is described in the second chapter of this thesis. This generator supplies a square pulse of current which is simpler to analyze than the usual ESD models. The NMOS transistor is the most common device involved in ESD protection circuit. The parasitic bipolar transistor included in the NMOS architecture is used to ensure the protection. Investigations performed on grounded gate NMOS transistor (ggNMOS) are described in the third chapter of the manuscript. Several parameters are studied and classified in both design and process dependent. Their impacts on the ggNMOS behavior are analyzed. Chapter IV is a comprehensive study of one of the design parameters, the contact to gate spacing. It is shown that the ESD failure threshold of an NMOS can saturate depending on the triggering mechanism. Using transient measurements of light emission, a three dimensional triggering of the NMOS is revealed. This effect is analyzed and shown to be responsible for the saturation. Chapter V is an attempt to explain the thermally induced failures of an NMOS during an ESD transient. Assumptions are based on several observations made during SEM and AFM measurements. It seems that the short circuit of NMOS transistors results from two successive mechanisms occurring when the current is localized, leading to a high increase of the temperature and the melting of silicon in two spots
Tounsi, Patrick. "Méthodologie de la conception thermique des circuits électroniques hybrides et problèmes connexes." Toulouse, INSA, 1992. http://www.theses.fr/1992ISAT0039.
Full textJosse, Stève. "Transportabilité de fonctions analogiques en technologies CMOS submicroniques : application : contrôle du retard des fronts d'horloges d'un imageur CCD." Toulouse, INPT, 2003. http://www.theses.fr/2003INPT029H.
Full textSiarry, Patrick. "La méthode du recuit simulé : application à la conception de circuits électroniques." Paris 6, 1986. http://www.theses.fr/1986PA066433.
Full textDoré, François. "Emetteurs à îlots quantiques pour le moyen-infrarouge." Rennes, INSA, 2008. http://www.theses.fr/2008ISAR0024.
Full textType I band lineups calculation for narrow gap structures on InP(001) substrate are presented It reveals the interest of InAsSb/GaAsSb association. Single dot model show a mixing of valence and conduction eigenfunctions in the confined eigenstates. This effect leads to non-radiative relaxations. Geometry has a strong impact on related characteristic times. IVBA calculations show a negative trend towards long wavelengths except for favoured areas. Large gap of strained InAs implies the use of big islands with low densities. Gain is then reduced. A 4 QD layers laser emitting at 1. 85 µm at 20 K has a threshold current density of 3,4 kA/cm². InAsSb dots formation in GaAsSb barrier turns out to be difficult. Antimony presence on the surface inhibits 2D-3D transition. Nevertheless this effect permits the formation of larger dots or thicker wells emitting until 2. 35 µm at 300 K
Rahim, Solaiman. "Techniques formelles pour la preuve d'équivalence de circuits séquentiels." Montpellier 2, 2004. http://www.theses.fr/2004MON20059.
Full textMureddu, Ugo. "Génération d'aléa dans les circuits électroniques numériques exploitant des cellules oscillantes." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSES018.
Full textWith the sharp increase in the deployment and integration of the Internet of Things, one challenge is to ensure security with respect to privacy and trust issues. With billions of connected devices, there is a huge risk of unauthorized use or abuse. To protect from such risks, security mechanisms are neede for per-device authentication and authorization, integrated in early design stages. Thankfully, cryptographic functions allow ciphering of sensitive data, as well as per-device authentication and authorization since they guarantee confidentialify, authenticity, integrity and non-repudiation. In this context, physical random generator (random number generator TRNG and physical unclonable functions PUF) are particularly useful since they generate secret keys, random masks or unique identifiers. The robustness of the cryptographic functions stand by the quality of the physical random generators. For that, numbers provided by those generators must be entropic. Otherwise, keys used to cipher data could be broken and identifiers could be retrieved. That's why, it is necessary to study physical random generators. In this thesis, we provide a rigorous approach to implement TRNGs and PUFs in reconfigurable logic devices. After that, we integrate those generators in a complete system. We also propose an innovative approach to evaluate the quality of PUF by modeling their behavior prior to designing it. This should he!p designers anticipate PUF quality in term of randomness. We also realize a complete a study of two kind of threats on physical random generators using oscillating cells: the locking phenomena and the EM analysis
Vianne, Benjamin. "Intégration d'un interposeur actif silicium pour l'élaboration de circuits électroniques complexes." Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4327.
Full textThe heterogeneous integration of microelectronic chips on a silicon interposer offers new perspectives in the manufacturing of complex systems for high bandwidths applications. However, the high density vertical assembly of several chips on this silicon platform has proven to be technologically challenging. This study is especially focused on the thermo-mechanical issues which affect the manufacturing of the interposer at multiple scales. At macroscopic scale, the high curvature of the die, induced by stress in thin films, has a negative impact on various assembly processes. By using a thermal shadow moiré technique, the characterization of the thermo-mechanical deformations aims to define and validate a strategy of curvature compensation through the deposition of thin dielectric layers on the back-side of the die. The integration of stress sensors to depict the mesoscopic local stress in 3D assemblies is then investigated. The study demonstrates the ability of piezoresistive based sensors to measure chip/package interactions in a typical interposer assembly flow. Eventually, the thermo-mechanical stress at microscopic scale induced by the copper through silicon vias in a silicon interposer are mapped thanks to a nanodiffraction technique using synchrotron radiation. Corresponding experimental investigations allow to validate a predictive numerical model and estimate the mobility variations of charge carriers in silicon around the vias. Eventually, the main barriers to silicon interposer adoption have been identified and several tools were developed to ensure the feasibility of future prototypes
Vianne, Benjamin. "Intégration d'un interposeur actif silicium pour l'élaboration de circuits électroniques complexes." Electronic Thesis or Diss., Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4327.
Full textThe heterogeneous integration of microelectronic chips on a silicon interposer offers new perspectives in the manufacturing of complex systems for high bandwidths applications. However, the high density vertical assembly of several chips on this silicon platform has proven to be technologically challenging. This study is especially focused on the thermo-mechanical issues which affect the manufacturing of the interposer at multiple scales. At macroscopic scale, the high curvature of the die, induced by stress in thin films, has a negative impact on various assembly processes. By using a thermal shadow moiré technique, the characterization of the thermo-mechanical deformations aims to define and validate a strategy of curvature compensation through the deposition of thin dielectric layers on the back-side of the die. The integration of stress sensors to depict the mesoscopic local stress in 3D assemblies is then investigated. The study demonstrates the ability of piezoresistive based sensors to measure chip/package interactions in a typical interposer assembly flow. Eventually, the thermo-mechanical stress at microscopic scale induced by the copper through silicon vias in a silicon interposer are mapped thanks to a nanodiffraction technique using synchrotron radiation. Corresponding experimental investigations allow to validate a predictive numerical model and estimate the mobility variations of charge carriers in silicon around the vias. Eventually, the main barriers to silicon interposer adoption have been identified and several tools were developed to ensure the feasibility of future prototypes
Rolland, Du Roscoat Laure. "Contribution à l’analyse des mécanismes de couplages dans les systèmes sur une puce." Limoges, 2009. https://aurore.unilim.fr/theses/nxfile/default/21f35996-5039-4ba6-bdaa-d11d45dad246/blobholder:0/2009LIMO4030.pdf.
Full textBecause of the shrink of IC technologies dimensions and of the continuous push for miniaturization and cost reduction, complex mixed-signals circuits have been developed on a same die. Considering disturbing electromagnetic interactions between analog and digital systems, before the chip realization, has become a real challenge, particularly to reduce product costs. Switching transients’ high current peaks induced by digital circuits inject noise into power supply rails and into the common substrate. Analog circuits lack the large noise margins of digital circuits, thus making them very sensitive to conducted and radiated signals variations. The work in this thesis spans all areas of noise: generation, propagation paths, and reception. Coupling mechanisms forming is explained in a real circuit environment with an advanced CMOS process. An injection model of a digital gate is presented. Substrate characterizations with a dedicated measurement structure valid the model and allow to estimate isolation gains obtained with specific topology strategies. A set of guidelines is proposed in order to implement accurate isolation structures, to decrease substrate injection, to place and route blocks at the high level of the chip. Optimization of Silicon area used between blocks are also evaluated. The importance to apply a coherent methodology at all designing steps is highlighted. Finally, a method to simulate interactions between whole networks at top level is proposed and validated on a test-chip circuit. Multi-scale approach is needed to take into account electromagnetic interactions at transistor level and also at inter-blocks level
Calvet, Sébastien. "Contribution à la réduction de l'émission parasite des micro-contrôleurs en CMOS sub-micronique." Toulouse, INSA, 2003. http://eprint.insa-toulouse.fr/archive/00000266/.
Full textLasbouygues, Benoît. "Analyse statique temporelle des performances en présence de variations de tension d'alimentation et de température." Montpellier 2, 2006. http://www.theses.fr/2006MON20027.
Full textIn the nanometer era, the physical verification of CMOS digital circuit becomes a complex task. Designers must account of numerous new factors that impose a drastic change in validation and physical verification methods. One of these major changes in timing verification to handle process variation lies in the progressive development of statistical timing engine. However the statistical approach cannot capture accurately the deterministic variations of both the voltage and temperature variations. Therefore our work proposes a novel method, based on non-linear derating coefficients, to account of these environmental variations. This method allows computing the delay of logical paths considering specifics conditions of each cell. The combined use of reduced supply voltage with high threshold voltage values may reverse the temperature dependence of designs, the worst case timing conditions becomes less predictable and can occur at different temperatures. This effect, called temperature inversion phenomenon is particularly critical for low power applications. The characterization, at each level (from device to critical paths) allowed us to define some techniques to take into account this effect into the design flow
Allemand, Michel. "Modélisation fonctionnelle et preuve de circuits avec LP." Aix-Marseille 1, 1995. http://www.theses.fr/1995AIX11015.
Full textBen, M'Hamed Bruno. "Contribution à l’analyse de la susceptibilité des composants électroniques à des perturbations transitoires : caractérisation et modélisation des éléments de protection." Limoges, 2010. https://aurore.unilim.fr/theses/nxfile/default/81a2f024-301f-467e-b07d-748c5a35fba1/blobholder:0/2010LIMO4049.pdf.
Full textThe presence of embedded systems using electronics has widely spread in the civil and military domains. Moreover, the significant increases of operating frequencies and integration densities are accompanied by a reduction of noise margins which obviously increases the sensitivity of the circuits against external electromagnetic interferences. In parallel, the number of potential disturbances continues growing, and the main problem is to assess the proper functioning of the systems to be used in this environment. The context of our study is to analyse the influence of the coupling of powerful parasitic sources on electronic systems. At the component level, the first elements seen by the signal are the protection devices. So the investigations achieved during this thesis have consisted in developing a theoretical and experimental methodology to evaluate the transient behaviour of the protections present in electronic circuits, with a special attention to the charge behaviour and the non-linear effects of the parasitic capacitances. The accuracy of this methodology is assessed to both discrete and on-chip protection devices
Alaeldine, Ali. "Contribution à l'étude des méthodes de modélisation de l'immunité électromagnétique des circuits intégrés." Rennes, INSA, 2004. http://www.theses.fr/2008ISAR0016.
Full textNowadays, the steep growth of mass-market complex electronic systems is the source of numerous electromagnetic disturbances, to with an increasing number of integrated circuits (ICs) are becoming more and more susceptible. Therefore, predicting the behaviour of integrated circuits to electromagnetic aggression, conducted or radiated, is a topical demand. This thesis introduces a new simulation methodology aimed to assess the conducted and radiated immunity of integrated circuits in their environment. The whole study was conducted thanks to a multi-core integrated circuit which was initially intended for the validation of low-emission design techniques; this circuit also made it possible to define new design rules to increase the immunity of integrated circuits against electromagnetic interference. This thesis is organized as follows. In the first chapter, an investigation of several electromagnetic disturbance sources and their influences on the behavior of integrated circuits is presented. Moreover, in the same chapter, the existing measurement methods for IC susceptibility to conducted and radiated, either continuous harmonic or fast transient pulses, are detailed. In the second and third chapters, complete electrical models for the simulation of conducted immunity are presented, with respect to continuous harmonic (DPI - Direct Power Injection) and fast transient (VF-TLP - Very Fast Transmission Line Pulsing) injection modes, respectively; furthermore, simplified electrical models for power losses and IC substrates are introduced. In the fourth chapter, a complete immunity simulation model for the near field (radiated) injection method is established and validated by measurements on the integrated circuit encapsulated in normal and unshielded packages. Finally, the fifth chapter is focused on the demonstration of the validity of suggested emission reduction techniques for susceptibility reduction, as well as their classification according to their respective efficiencies and costs. The prospective of this thesis lies in the development of pre-manufacturing immunity prediction models for integrated circuits; these models can be used for the immunity simulation of an IC located on a printed circuit board inside a complex system
Dukay, Bernadett. "Les enjeux des nouvelles relations contractuelles dans le commerce électronique entre professionnels." Paris 2, 2009. http://www.theses.fr/2009PA020101.
Full textCadoret, Davidl. "Etude de cellule déphaseuses imprimées combinant patchs et fente : Application à la réalisation de réseaux réflecteurs simple couche." Rennes, INSA, 2006. http://www.theses.fr/2006ISAR0015.
Full textThe presented work deals with the study and the realization of new reflectarray cells, printed on a single substrate, and reflectarray antennas. The first objective is to carry out simulations and measurements of reflectarray cells in monopolarization and bipolarization conditions (linear polarization). One of the main issue of this work is to offer antennas with a large bandwidth, low losses and a low cost. To realise this study, some characterisation methods were implemented thanks to the following simulation softwares : Ansoft HFSS and an homemade FDTD code. The second objective is to realise measurements of antennas composed of our new reflectarray cells. The 8 realised antennas lead to good performances and validate some new conception methods
Lafleur, François. "Développement d'un vibrateur acoustique pour précipiter les défauts latents de circuits électroniques." Mémoire, École de technologie supérieure, 2003. http://espace.etsmtl.ca/772/1/LAFLEUR_Fran%C3%A7ois.pdf.
Full textGuerin, Mathieu. "Conception de circuits électroniques au moyen de la technologie CMOS organique imprimée." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4780/document.
Full textDuring the past few years, the field of organic electronics has known an important development. The CEA LITEN is able to manufacture N-type and P-type screen-printed transistors on a same plastic sheet, enabling the design of complementary circuits. The performances and limitations of this technology are studied since one of this thesis’ main objectives is to determine the feasibility of a fully-printed organic RFID tag. Such a tag would be flexible and could be manufactured at an extremely low-cost. Some circuits commonly used in the RFID tags, and using up to 50 transistors, are designed and tested, showing some performances equivalent or above the reported latest developments. The organic electronics manufacturing process is not as mature as the one used in the classical silicon industry. Therefore, a study is performed concerning the effects of this process scattering, as well as the ageing, on the circuits’ performances. The main improvements (in terms of reliability, organic semi-conductor mobility, size) that can help the organic electronics in order to compete, one day, with the silicon industry, are discussed
Lefranc, Pierre. "Etude, conception et réalisation de circuits de commande d'IGBT de forte puissance." Lyon, INSA, 2005. http://theses.insa-lyon.fr/publication/2005ISAL0097/these.pdf.
Full textIGBT (Insulated Gate Bipolar Transistor) is one of the main active component of power electronic. Since his beginning in the early 1980's, it is a serious competitor for thyristors, GTOs, MOSFETs and bipolar transistors. Nowadays, IGBT can be used in applications as power modules that are described in this thesis. Gate drive circuits are linked to IGBT power modules, they are also called "driver". The main functions are to drive the gate of the IGBT and to protect IGBT from overcurrent and overvoltage. Realization and conception of gate drive circuits are presented. To do so, we present a state of the art IGBT and gate drive circuits. And, we give a modelization of IGBT modules with inductive effects. We study the dynamic avalanche phenomenon in over current condition. Finally, we expose conception and realization of gate drive circuits. The main function of the driver is subdivided so as to structure the conception. Each sub-function is studied with simulations and experimental results
Levant, Jean-Luc. "Mise en place d'une démarche d'intégration des contraintes CEM dans le flot de conception des circuits intégrés." Rennes, INSA, 2007. http://www.theses.fr/2007ISAR0018.
Full textKlingler, Marco. "Étude phénoménologique de la sensibilité électromagnétique de composants électroniques logiques implantés sur circuits imprimés." Lille 1, 1992. http://www.theses.fr/1992LIL10100.
Full textSkaiky, Ahmad. "Elaboration, caractérisation et modélisation de transistors à base de pentacène : application aux circuits électroniques organiques." Limoges, 2013. https://aurore.unilim.fr/theses/nxfile/default/4737153e-a6e7-43d2-8732-12d928481863/blobholder:0/2013LIMO4006.pdf.
Full textThe objective of this thesis is the modeling of organic transistors based on pentacene and the realization of inverter electric circuits. In this context, we have studied charge transport mechanism in pentacene with two methods (I(V) and impedance spectroscopy) and we have determined the physical properties of pentacene (mobility, trap density, trap energy level…). After that, we have realized an organic field-effect transistor in “top contact” structure while studying the impact of the channel length and thickness of active layer on the performance of this device and while comparing the results with those obtained from the simulation carried out with ATLAS software. We have found a good concordance concerning output and transfer curves. Finally, we have developed organic inverters first in the “diode-load inverter” architecture. The optimization of parameters like the channel length, the thickness of the active layer and the deposition rate of pentacene has led to a significant voltage gain as we work on change in crystalline morphology. With dual threshold voltage OTFT organic inverter in depletion mode have been realize with gain around 7. These results open new perspectives and could be improved by manufacturing inverters in O-CMOS technology
Bannino, Joseph. "Approche connexionniste pour la génération automatique de séquences de test de circuits digitaux." Chambéry, 1997. http://www.theses.fr/1997CHAMS007.
Full textShram, Nataliya. "Mise en oeuvre de microbiocapteurs enzymzatiques pour la détection du glucose et du lactate in vivo." Ecully, Ecole centrale de Lyon, 1998. http://www.theses.fr/1998ECDL0003.
Full textMullet, Franck. "Contribution à la recherche de structure : application à l'abstraction des circuits électroniques mixtes." Versailles-St Quentin en Yvelines, 1997. http://www.theses.fr/1997VERS0006.
Full textMorel, Cristina Monica. "Analyse et contrôle de dynamiques chaotiques, application à des circuits électroniques non-linéaires." Angers, 2005. http://www.theses.fr/2005ANGE0020.
Full textSwitch-mode power supplies are highly non-linear systems that can naturally exhibit a chaotic behavior. We first study the control of chaos, i. E, a means to remove chaos, with sliding mode control. Nevertheless, inducing chaos in these systems reduces their electromagnetic interferences emissions, yet at the expense of aggravating the overall magnitude of the output voltage ripple. We then introduce a nonlinear feedback control method, which induces chaos, and which is able at the same time to achieve low spectral emission and to maintain a small ripple in the output. We also propose a new technique to generate several independent chaotic attractors, by designing a switching binary controller of continuous-time systems : this controller can create chaos using an anticontrol of chaos feedback. We show that non-linear continuous-time systems have several attractors and demonstrate that their state space equidistant repartition is on a precise curve. A mathematical formula giving the distance between the attractors is then deduced. Finally, a practical implementation is described, with some experimental measurements
Ayoub, Kamel. "Représentation analytique des briques de base, miroirs et différentiels en technologie duale unipolaire et bipolaire." Toulouse, INPT, 2000. http://www.theses.fr/2000INPT033H.
Full textRobilliart, Etienne. "Développement de modèles non-quasi-statiques MOS et bipolaires : application à l'analyse des effets de propagation de charges." Lille 1, 1996. http://www.theses.fr/1996LIL10161.
Full textCarlier, Florent. "Nouvelle technique neuronale de détection multi-utilisateurs : Applications aux systèmes MC-CDMA." Rennes, INSA, 2003. http://www.theses.fr/2003ISAR0019.
Full textGeynet, Lionel. "Conception de circuits de synthèse de fréquence fractionnaire multi-standards sur technologie SOI." Nice, 2006. http://www.theses.fr/2006NICE4089.
Full textThe purpose of this study is to demonstrate the interest of the 130nm SOI technology for multi-standard synthesizer used for wireless applications. The most commonly standards found in telecommunication have to be covered by this architecture with only one VCO, GSM, GPS, DCS, Bluetooth, WLAN. The VCO is the critical building block in the frequency synthesizer. Its performance, in terms of phase noise, tuning range or supply voltage rejection are very important in order to realise a good phase locked loop (PLL). A “bottom-up” methodology was used to investigate this subject. Our approach was to design two VCOs, one at 5. 2GHz and another one at 3. 6GHz, to characterize phase noise performance and the influence of body bias. Different switched LC tanks have been realised in the purpose of being integrated in multi-band VCOs. The fabrication of VCO has a real interest only if it’s introduced in a PLL. The second part of this work was therefore to create a model of these VCOs and realise a complete behavioural modelling of a multi-standard PLL using Matlab and VHDL_AMS. The fractional-N PLL which has lots of advantages for these applications, was the chosen architecture. This circuit has been implemented in order to validate the functionality and the great interest of SOI technology for multi-standard wireless applications
Robach, Yves. "Etude des oxydes natifs d'InP : application aux composants électroniques." Lyon 1, 1989. http://www.theses.fr/1989LYO10002.
Full textCHáVEZ, YZQUIERDO Jhordan. "Semi-passive conditionning circuits for efficient electrostatic energy harvesting." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPAST185.
Full textThe thesis explores small-scale energy harvesting, focusing on electrostatic energy harvesting circuits. It aims to convert ambient energy into electricity to sustainably power electronic devices and sensors, especially in remote or inaccessible locations.This technology could replace traditional batteries, which suffer from leaks, limited capacity, and sensitivity to temperature fluctuations. It extends the lifespan of devices and reduces the need for frequent recharges, which is crucial for the Internet of Things (IoT). Energy harvesting technologies support the autonomy and flexibility of IoT deployments, reducing maintenance costs and enabling real-time monitoring and predictive maintenance.The thesis analyzes the state of the art in electrostatic energy harvesting circuits, focusing on their efficiency and practical implementation through QV (charge-voltage) diagrams. Rectangular QV cycle circuits, although simple, are less efficient, while triangular QV cycle circuits offer better performance but are more complex to implement.An innovative approach combines the advantages of both types of circuits, proposing a semi-passive technique where the transducer's charge and discharge are synchronized with structural movement, using controllable switches to maintain triangular cycles. This balance between simplicity and efficiency is a key contribution of this research.The thesis also explores various types of transducers for electrostatic energy harvesting. MEMS transducers offer high precision and miniaturization but they face efficiency issues at high frequencies. Polymer-based capacitors achieve high capacitance but they have lot of energy loss on the transducer itself. Flapping capacitors efficiently convert vibrational energy but require precise mechanical design. Adjustable Metal Capacitors, used in resonant circuits, are simple to implement and they have moderate energy loss (on the transducer itself), making them a reliable option for the developed circuits. Thus, the Adjustable Metal Capacitor is chosen to validate the developed circuits.A particular aspect of the thesis is the exploration of the photocapacitive element, using light-sensitive materials to convert light energy into electricity. Initially designed as a variable capacitor, experiments showed that this element functions primarily as a current generator when exposed to light. Tests with the Bennet doubler circuit revealed that the transducer generates current without an applied bias voltage, suggesting a different operating mode that could be further explored.The research introduces the SCDI method (Synchronized Charge and Discharge on Inductance), balancing simplicity and efficiency in energy conversion. This method synchronizes charge and discharge cycles through an inductance, improving the conversion of mechanical vibrations into electrical energy. Tests showed that the SCDI method could convert about 1 µJ of energy per cycle (with a 60V storage component), requiring low-loss transducers for efficient energy transfer.Building on the SCDI method, the thesis presents the SCDIP technique (Synchronized Charge and Discharge on Inductance with Positive Cycle), using only a positive QV cycle to further improve efficiency. This method reduces energy losses in the transducer, significantly enhancing energy harvesting performance compared to the SCDI method
Batard, Christophe. "Interactions composants-circuits dans les onduleurs de tension : caractérisation, modélisation, simulation." Toulouse, INPT, 1992. http://www.theses.fr/1992INPT044H.
Full textOuchelouche, Larbi. "Conception et réalisation d'un adaptateur électronique microonde programmable pour mesures de bruit sous pointes." Limoges, 1993. http://www.theses.fr/1993LIMO0187.
Full textRatsimandresy, Andriamanantsoa. "Contribution à la modélisation et aux simulations en compatibilité électromagnétique des câbles et des circuits microélectroniques." Toulouse, INPT, 1994. http://www.theses.fr/1994INPT041H.
Full textKamdem, Alain. "Etude des interactions électriques conduites sur des composants et systèmes électroniques." Caen, 2015. http://www.theses.fr/2015CAEN2008.
Full textOver the years, industries and standards associations focused on reducing electronic device degradation due to ElectroStatic Discharge (ESD). However, ESD only represents a small part of these events. Indeed, there are few studies on Electrical OverStress (EOS) events which are responsible of an important amount of failures. The aim of this thesis is to define a clear classification among EOS events but also to study robustness and failure mechanisms in integrated circuits exposed to these events. For integrated circuits users and suppliers, electrical events are describe by the degradation and not by their root causes. This can be translated by an absence of standard presenting a test methodology or a specific characterization equipment. The test bench setup and the different waveforms used in this study are presented. Finally, these works show that to better specify devices Absolute Maximum Rating (AMR), it is necessary to deepen the knowledge of robustness threshold while understanding the failure mechanisms in ICs components
Janicot, Vincent. "Simulation des circuits électroniques RF/Analogiques/Numériques excités par des signaux à modulation complexe." Phd thesis, Université Joseph Fourier (Grenoble), 2002. http://tel.archives-ouvertes.fr/tel-00004464.
Full textRebora, Charles. "Développement de matrices mémoires non-volatiles sur support flexible pour les circuits électroniques imprimés." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0643.
Full textFlexible electronics market revenue is expected to exceed $10B by 2020. Duento their mechanical flexibility, flexible circuits will enable numerous developmentsnin various fields from internet-of-things applications to large area electronics. Besides logic devices, memory is the second fundamental component of any electronic system. During this thesis, we aimed at developing nonvolatile memories referred as CBRAM (Conductive-Bridge Random Access Memories) for flexible electronics applications. These devices consist in a simple Metal-Electrolyte-Metal structure. The memory effect relies on resistance switching due to the formation/dissolution of a metallic conductive filament within a solid electrolyte. The use of chalcogenide glasses or polymers layers as solid-electrolytes offers many opportunities for future for flexible applications. In a first part, memory devices based on of GeS$_x$ and de Ge$_X$Sb$_Y$Te$_Z$ solid electrolytes on silicon substrates we fabricated and electrically tested. Experimental results were then confronted to an electro-thermal model, based on ionic current, developed during this thesis. The final chapter of this manuscript is devoted to the development of flexible memories
Rebora, Charles. "Développement de matrices mémoires non-volatiles sur support flexible pour les circuits électroniques imprimés." Electronic Thesis or Diss., Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0643.
Full textFlexible electronics market revenue is expected to exceed 10B dollars by 2020. Duento their mechanical flexibility, flexible circuits will enable numerous developmentsnin various fields from internet-of-things applications to large area electronics. Besides logic devices, memory is the second fundamental component of any electronic system. During this thesis, we aimed at developing nonvolatile memories referred as CBRAM (Conductive-Bridge Random Access Memories) for flexible electronics applications. These devices consist in a simple Metal-Electrolyte-Metal structure. The memory effect relies on resistance switching due to the formation/dissolution of a metallic conductive filament within a solid electrolyte. The use of chalcogenide glasses or polymers layers as solid-electrolytes offers many opportunities for future for flexible applications. In a first part, memory devices based on of GeS(X) and de Ge(X)Sb(Y)Te(Z) solid electrolytes on silicon substrates we fabricated and electrically tested. Experimental results were then confronted to an electro-thermal model, based on ionic current, developed during this thesis. The final chapter of this manuscript is devoted to the development of flexible memories
Dupuy, Gilles. "Application des cristaux liquides à l'analyse de fonctionnalité et de défaillance des composants électroniques." Bordeaux 1, 1985. http://www.theses.fr/1985BOR10616.
Full textNongaillard, Matthieu. "Contribution à des règles de dessin pour la fabrication de circuits intégrés passifs PICS." Lyon, INSA, 2010. http://theses.insa-lyon.fr/publication/2010ISAL0047/these.pdf.
Full textSince the first integrated circuits, the semiconductor industry has innoved in the field of miniaturization at device level. NXP and IPDiA companies design sb-SiP (silicon-based System in Package) which allows to package together active dice on a passive one. This concept is based on PICS technology (Passive Integration Connective Substrate) which is dedicated to the integration of passive devices, especially high capacitance values. Reliability issue of PICS passive devices could be studied against the robustnes of the process or the beneficial impact of a dedicated design approach. This study focuses on the thermo-mechanical robustness of passive dice with a dedicated design approach. First, we have determined tools for investigation of robustness. Then, experiments were conducted on several stress relief methods and also on a robustness improvement of passive devices. The aim of this study is to determine dedicated design rules, which improve the global thermo-mechanical reliability of PICS circuits
Guilhaume, Agnès. "Evaluation de la robustesse de circuits intégrés vis-à-vis des décharges électrostatiques." Lyon, INSA, 2002. http://theses.insa-lyon.fr/publication/2002ISAL0044/these.pdf.
Full textThe aim of this dissertation is to define criteria to select proper devices to withstand ElectroStatic Discharges (ESD). The industrial tests (HBM, MM) do not take into account the dynamic behaviour of devices and the users of electronic components are puzzled by the variety of new ESD tests (TLP, CDM…). A methodical approach, allying experimental characterisations and physical simulations, was thus presented and validated. It was applied to elementary structures of ESD protection (GGNMOS, SCR, LVTSCR) built either with the same technology or with different technologies (micronic and submicronic). We were then able to compare the current-voltage characteristics and the physical behaviour of those devices. This work gives data on the impact of the process evolutions on the ESD ruggedness and on the most useful ESD tests. It also helps to define pieces of advice dedicated to users of components and related to the choice of highly protected devices
Bengharbi, Amar. "Contribution au test et diagnostic des circuits analogiques par des approches basées sur des techniques neuronales." Paris 12, 1997. http://www.theses.fr/1997PA120083.
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