Dissertations / Theses on the topic 'Circuits électriques non linéaires'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Circuits électriques non linéaires.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Recly-Lesecq, Agnès. "Etude de l'optimisation des circuits non linéaires microondes." Limoges, 1993. http://www.theses.fr/1993LIMO0230.
Full textAbdellaoui, Mahmoud. "Utilisation de la matrice de conversion pour l'étude des dispositifs non linéaires à transposition de fréquences : application aux mélangeurs." Châtenay-Malabry, Ecole centrale de Paris, 1991. http://www.theses.fr/1991ECAP0167.
Full textNgoya, Edouard. "Contribution à la création d'outils de C. A. O. Des circuits non-linéaires microondes." Limoges, 1988. http://www.theses.fr/1988LIMO0026.
Full textCoupat, Jean-Marc. "Synthèse expérimentale d'impédances par la technique de la charge active : application à la conception d'un système de caractérisation de composants microondes de puissance fortement désadaptés." Limoges, 1994. http://www.theses.fr/1994LIMO0026.
Full textEl, Oualkadi Ahmed. "Analyse comportementale des filtres à capacités commutées pour les radiocommunications : conception d'une nouvelle architecture en technologie BiCMOS 0.35 μm". Poitiers, 2004. http://www.theses.fr/2004POIT2354.
Full textThe main objective is to study the feasibility of monolithic switched capacitor filters for radiocommunications. The behavioral analysis of these filters required the establishment of an original algorithm based on the conversion matrixes formalism. This analysis method seems to be nowadays among the more efficient in term of calculation time. At low-frequencies the command of these filters is performed by using a shift register. However, this technique is not feasible in RF domain. An original solution proposed, it consists in the command of the filter by a ring voltage controlled oscillator with XOR gates. The simulation results have shown the impact of the command circuit jitter on the filter behavior and the adaptability of the whole circuit for digital transmission. A prototype has been fabricated in standard BiCMOS 0. 35 μm technology. The experimental results are in agreement with simulations ones and are susceptible to render these filters attractive for RF applications
Taboada, Sergio Gilberto. "Synthèse de filtres non linéaires appliqués à la poursuite 3D et à l'azimétrie." Toulouse, ENSAE, 1986. http://www.theses.fr/1986ESAE0014.
Full textFueyo, Sébastien. "Systèmes à retard instationnaires et EDP hyperboliques 1-D instationnaires, fonctions de transfert harmoniques et circuits électriques non-linéaires." Thesis, Université Côte d'Azur, 2020. http://theses.univ-cotedazur.fr/2020COAZ4103.
Full textAmplifiers contain linear, passive components as well as nonlinear, active ones, all of which can be described by finitely many state variables; but they also contain transmission lines, typically modeled by simple hyperbolic Partial Differential Equations (PDE) like lossless telegrapher equations, that make the global state space of the circuit infinite-dimensional. Using an integrated form of telegraphers equations,one obtains a model comprised of delay difference and differential equations. Using first order approximation, this reduces to exponential stability of the time-periodic linear system obtained by linearizing around the periodic solution, which is a network of delay difference equations whose boundary conditions are coupled by differential equations. The stability of this kind of equation is strongly correlated with the stability of a periodic linear difference delay system (via a compact perturbation argument). The thesis then establishes conditions to guarantee the stability of periodic difference delay system systems. Due to the huge number of electronic components, it is known in electronic engineering textbooks that stability cannot be determined directly from the linearized system. To study the stability properties of the previously-described linearized system, one constructs a family of input-output systems, obtained by perturbing the linearized system by a small current $i$ at some node of the circuit and observing the resulting perturbation of the voltage $v$ between two nodes. Via a Fourier development, stability is studied through the singularities of the harmonic transfer function (HTF) which is an infinite matrix depending on a complex variable with Banach value. Under high frequency dissipativity assumption, which are always verified for amplifiers, the HTF has at most poles in a complex right half-plane containing strictly the imaginary axis. These poles are in particular the logarithms of a finite family of complex numbers, and under an assumption of controllability and observability, the periodic solution is locally stable if and only if the HTF has no poles in the complex right half-plane
Graux, François. "Méthodologie de modélisation boîte noire de circuits hyperfréquences non linéaires par réseaux de neurones : applications au radar." Lille 1, 2001. https://pepite-depot.univ-lille.fr/RESTREINT/Th_Num/2001/50376-2001-47.pdf.
Full textPortilla, Rubin Joaquin. "Modélisation électrique des transistors à effet de champ pour la CAO des circuits microondes linéaires et non linéaires." Limoges, 1994. http://www.theses.fr/1994LIMO0005.
Full textFoulon, Michel-François. "Métamatériaux térahertz en régime linéaire et non linéaire." Thesis, Lille 1, 2008. http://www.theses.fr/2008LIL10121/document.
Full textArtificial materials so called «metamaterials» are studied theoretically and characterized at few hundred of GigaHetrz frequencies. Frequencial and temporal (electro-optic) methods are used to prove their left handed behaviour. For this study, two approaches have been considered : - the first one is based on the fabrication of micro-resonators and metallic wires arrays aiming at operating at 100 GHz. An experimental evidence of a left handed dispersion branch is then made from vectorial analysis. - the second approach takes profit of phase advance effects that can be obtained from a transmission line periodically loaded with a series capacitance and a parallel inductance. The specificity of this study is a coherent time domain approach that allows us to directly visualize a phase advance and the corresponding left handed behaviour. Those results are confirmed by the calculations of Fourier transforms up to 1 TeraHertz. Non linear properties of those circuits are then studied by introducing a non linearity by the mean of a Heterostructure Barrier Varactor component. The extension of this study to the non linear regime is treated via the dynamic characterization of this component. Finally, two types of non linear regimes are studied for a left handed transmission line loaded with HBV diodes with respectively harmonic generation and parametric amplification
Portela, de Carvalho Paulo Henrique. "Approche orientée objet de l'analyse des circuits non linéaires hyperfréquences ; architectures de simulateurs et bibliothèques de composants logiciels." Limoges, 1993. http://www.theses.fr/1993LIMO0201.
Full textHochart, Isabelle. "Etude de la diaphonie entre conducteurs : élaboration d'une méthode de caractérisation de composants non linéaires : application à l'étude des effets engendrés par une perturbation harmonique sur des circuits logiques." Lille 1, 1998. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/1998/50376-1998-448.pdf.
Full textCollantes, Juan-Mari. "Modélisation des transistors Mosfets pour les applications RF de puissance." Limoges, 1996. http://www.theses.fr/1996LIMO0008.
Full textTamen, Beaudouin. "Modélisation du bruit dans les composants en régime de fonctionnement grand signal : application à la conception de circuits intégrés non linéaires faible bruit pour les télécommunications." Lille 1, 2000. http://www.theses.fr/2000LIL10102.
Full textTelliez, Isabelle. "Contribution à la modélisation non linéaire de TEC en GaAs : application à la conception d'amplificateur arborescent 1W bande C. en technologie monolithique." Lille 1, 1991. http://www.theses.fr/1991LIL10147.
Full textAuzereau, Lionel. "Prise en compte de circuits complexes non linéaires dans les codes différences finies dans le domaine temporel : Applications en compatibilité électromagnétique et dans le domaine des télécommunications." Limoges, 1997. http://www.theses.fr/1997LIMO0001.
Full textBoyavalle, Christophe. "Conception de récepteurs à faible bruit dans le domaine millimétrique en étudiant le bruit électrique dans les circuits non linéaires micro-ondes." Lille 1, 1997. http://www.theses.fr/1997LIL10216.
Full textMagnet, Christophe. "Traitement non-linéaire de la tension de sortie d'éléments piézoélectriques : application aux transformateurs piézoélectriques et au contrôle de vibration de cartes électroniques." Lyon, INSA, 2006. http://theses.insa-lyon.fr/publication/2006ISAL0081/these.pdf.
Full textThese last years, applications using piezoelectric materials developed considerably. The application fields of these materials are numerous: structural vibration control, acoustic control, energy harvesting, piezoelectric transformers…. The LGEF sets of themes include adaptive system development containing electroactive materials with, in particular, the development of a technique called SSD (for Synchronized Switch Damping). This technique consists in a non linear processing of the voltage generated by piezoelectric elements. The work presented here consists in looking further into SSD techniques and adapting them to power density optimisation of piezoelectric transformers and to the structural vibration control of electronic boards. When applied to “piezoelectric transformers”, the non linear techniques experimentally show a clear improvement of the power density with, under certain conditions, an improvement of the power transfer efficiency. These enhancements are in agreement with theoretical predictions. Applied to structural vibration control of electronic boards, non-linear techniques raise the problem of the electromechanical coupling optimisation regarding the surface covered by the piezoelectric inserts. The work carried out in this field has made it possible to identify the main parameters for a global electromechanical coupling factor optimisation. Finally, a multimodal model has been developed: it made it possible to evaluate the multimodal effectiveness of various control laws with various complexities in order to compare them
Dib, Wissam. "Contribution à la stabilité transitoire des systèmes de puissance multi-machine." Paris 11, 2009. http://www.theses.fr/2009PA112110.
Full textThis thesis is devoted to the problem of enlarging the region of attraction of equilibria in power systems. We focus our attention on multimachine power systems subjected to a severe 3-phase short circuit fault and propose a new energy based control law for excitation control of synchronous generators. Furthermore, in contrast with aggregated models used in the classical research of transient stability to describe the dynamic behavior of multimachine power systems, we consider in this work the more natural; and widely popular structure preserving models that preserve the identity of the network components and allow for a more realistic treatment of the loads. These models consist of differential algebraic equations, where the algebraic constraints stem from the power flow balance between generators, loads, and lines. Our first contribution is the explicit computation of a solution for these equations. Moreover, we explicitly calculate a control law that, under a detectability assumption, ensures that all trajectories converge to the desired equilibrium point. However, similarly to most developments reported by the control theory community on the transient stability problem, it is clear that the complexity of the proposed controller stymies the practical application of this result. On a more practical level, we propose: first, a family of reduced models for multimachine power systems using the method of moment for nonlinear systems. Secondly, using the immersion and invariance methodology, we construct a new stabilizing control law for the power systems, where the formulation of the control problem is adjusted to meet the practical transient stability requirement
Bost, François. "Vers une modélisation temporelle unifiée des phénomènes électromagnétiques conduits et rayonnés dans les systèmes électriques : Application à l'électronique de puissance." Ecully, Ecole centrale de Lyon, 1999. http://www.theses.fr/1999ECDL0050.
Full textPottrain, Alexandre. "Caractérisation non linéaire des composants silicium jusque 220 GHz." Thesis, Lille 1, 2012. http://www.theses.fr/2012LIL10186.
Full textMany applications are emerging at millimeter wave frequencies (radar, imaging, satellite or point to point communications). The ‘DotFive’ project gather industries and laboratories working in microelectronics field (STMicroelectronics, Infineon, IMEC, IHP, Dresden University,.) with the aim to product silicon devices with fMAX>500 GHz for year 2013. In this context, STMicroelectronics recently published results on SiGe HBT showing fMAX>400 GHz. The state of the art in this field is 0.5 THz (Dotfive). Thanks to these high performances, silicon technology seems to be a good challenger for millimeter wave applications. Main advantages of this technology are its ability to propose low cost production and the capability to integrate digital and radiofrequency applications on a single chip. However, non linear performances of the silicon technology have never been studied at millimeter wave frequencies. To this aim, non linear test bench are needed. Before this PhD, I.E.M.N. and STMicroelectronics were limited to 40 GHz. Thus, the goal of this thesis focus on the development of load pull test bench up to 220 GHz. First a W band (75 GHz-110 GHz) load pull test bench has been developed. The main innovation is the ability to extract non linear S11 parameter, in order to obtain an extremely high precision. Then, a G band load pull test bench has been developed with integrated impedance tuner for load impedance variation. The use of integrated impedance tuner was justified by unavailability of external tuner and the high probe losses at these frequencies. The designed integrated tuners have to respect fixed specifications for covered smith chart area and linearity. Due to the difficulty to find fast power measurement devices, we also developed a diode detector on III-V technology.These previously developed test bench allow studies on non linear behavior of CMOS and BiCMOS devices and on the mains physical effects (thermal effect, breakdown,…) which limit power performances from DC to 200 GHz. We will see that BiCMOS technology offer state of the art power density measured at 94 GHz. Finally, integration of a complete load pull test bench on silicon wafer is envisaged. This work have been done for the common laboratory I.E.M.N./STMicroelectronics
Ducatteau, Damien. "Caractérisation non linéaire et analyse de transistors à effet de champ pour applications hyperfréquences dans le domaine temporel." Thesis, Lille 1, 2008. http://www.theses.fr/2008LIL10043/document.
Full textThe goal of this PhD work has been to implement a non linear network analyzer (LSNA), to validate measurements, to develop measurements and analysis tools in time domain in order to understand limiting effects on field effect transistors at microwave frequencies. First, we show the importance of the non linear characterization for the design of active circuits. Second, we de scribe the Large Signal Network Analyzer setup and its implementation. After that, in order to evaluate the performance of this equipment, we have compared measurements provided by equipment and by those coming from other laboratories on the same reference device. ln the next part, we describe the setup of an active load pull large signal network analyzer developed in our laboratory. Then, in order to validate our setup, we compare non linear measurements obtained under in load pull conditions with data coming from simulation performed on a reference device. The following of this work is devoted to an experimental study in time domain, using LSNA, on the lirniting effects of impact ionization inside GaAs HEMT devices. We present sorne experimental results and mainly measurements under large signal conditions in time domain. A non linear electrical model allows us to account for the impact ionization effects on the time domain waveforms. The next part is devoted to a specific study of passivation and surface pretreatrnent carried out on A 10. 81InO.19N/GaN HEMT device. We show the advantages to use the active load pull large signal network analyzer for studying the influence of passivation and surface pretreatrnent on the power performance. To fmish, we discuss on the traps localization and dynamic
Desmet, Yann. "Echantillonnage de signaux radar par voie optoélectronique : étude des non-linéarités des photoconducteurs à cavité résonante." Thesis, Lille 1, 2018. http://www.theses.fr/2018LIL1I019/document.
Full textThis thesis aims to study the nonlinear behavior of a photoconductor used as a microwave sampler. These photoconductors optimize the optical absorption thanks to a Fabry-Pérot resonant cavity. We first carried out a characterization work of photoconductors with different geometrical properties (diameter, cavity thickness) and material (carriers lifetime) to extract the influence of these parameters on the sampling performance. We then developed an optoelectronic model based on the current-voltage characteristic and the empirical Canali’s charge carriers drift model with a quasi-static approach. This model allowed us to isolate some characteristics of the photoconductor that could be the source of the harmonics. A new photoconductor structure has been developed in order to overcome these imperfections. The results of measurements show a symmetry of the current-voltage characteristic which results in a reduction of 20 dB of the even-order harmonics. A significant reduction in the capacity is also achieved which increases the cut-off frequency of these devices
Meghdadi, Neyshabouri Vahid. "Contribution à l'étude des charges utiles forte capacité : Modélisation de l'étage d'amplification en puissance - Méthodes de démultiplexages numériques." Limoges, 1998. http://www.theses.fr/1998LIMO0056.
Full textYang, May tia. "Etude des performances en bruit de capteurs magneto(élasto)électriques en mode non-linéaire." Thesis, Normandie, 2017. http://www.theses.fr/2017NORMC266/document.
Full textThe MagnetoElectric effect traduces the polarization of a dielectric element and the magnetization of a dielectric under respectively a magnetic field and an electric field. This property allows the development of Magneto(Elasto)Electric sensors for measuring a magnetic or an electric field. Several analyses regarding the material coupling (shape, size, dimensions…) have been made in order to increase the performances in terms of sensibility and in terms of noise of these sensors. The best noise levels (in term of spectral density) measured for these types of sensors are respectively 5 pT/sqrt(Hz), 0.2 pT/sqrt(Hz) and around 50 fT/sqrt(Hz) at 1 Hz, at white noise zone and at resonant frequency.Some laboratories, including the GREYC, are interested more specifically on the studies of the ultimate performances of magnetic sensor by optimizing the conditioning electronics and by using their nonlinear properties. This thesis lies in this framework. It had for objective, to study the performances of the Magneto(Elasto)Electric sensor in nonlinear mode and at low frequencies. For these, some original conditioning structures have been developed in terms of polarization, excitation and servo system. The theoretical study of these performances show the sensor intrinsic noise can reach lower than pT/sqrt(Hz) at 1 Hz for the studied sensor if the obtained performances are not limited by the conditioning electronics and their sensitivity. This study has been the object of this thesis work
Siligaris, Alexandre. "Modélisation grand signal de MOSFET en hyperfréquences : application à l'étude des non linéarités des filières SOI." Lille 1, 2004. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/2004/50376-2004-Siligaris.pdf.
Full textMorel, Adrien. "Interfaces électriques adaptatives dynamiquement au spectre fréquentiel pour la récupération d'énergie vibratoire large bande." Electronic Thesis or Diss., Chambéry, 2020. http://www.theses.fr/2020CHAMA035.
Full textEnergy harvesting is an emerging field whose main aim is the development of autonomous sensor nodes that do not require maintenance. Scavenging the energy contained in ambient vibrations is of particular interest when the sensor lies in a closed and confined environment, where there are few solar radiations or thermal gradients. However, a massive industrialization of vibration energy harvesters is currently hindered by their low robustness. Indeed, aging of the energy harvester, temperature drifts, or variations of the vibrating source might deviate the vibration frequency away from the energy harvester’s resonant frequency, drastically reducing the harvested energy. This thesis studies approaches allowing to electrically tune the resonant frequency of a piezoelectric vibration energy harvester, in order to monitor its dynamics in real-time. After establishing the background of this thesis, we develop an electromechanical model of the piezoelectric energy harvester coupled to the electrical interface. A normalized analysis of this model allows us to reduce all the influences of the electrical interface on the dynamics of the system to two physically meaningful variables: the electrical damping and the electrical stiffness. The adjustment of these two parameters is first analyzed, then achieved through combinations of resistive, capacitive and inductive linear loads. Extending this analysis to non-linear electrical interfaces has enabled the development of several innovative energy extraction strategies. The experimental validations of these strategies with energy harvesters made with strongly coupled piezoelectric materials are in great agreement with our model and demonstrate the value of our approach. The quantitative comparison of these strategies is made possible thanks to the development of several analysis tools and a figure of merit taking into account the frequency behavior of the harvester associated with a given electrical strategy. This comparison allows us to determine and justify which strategy to implement thanks to a dedicated integrated circuit. The microelectronic integration of this energy extraction strategy is the last step of this thesis. Our integrated circuit includes a power path, a cold-start, self-powered sensors and a low-power algorithm allowing real-time monitoring of the harvester’s resonant frequency. The maximum efficiency reached by our circuit is 94%. In addition to its performance, this circuit is the first self-powered solution that adjusts the resonant frequency of the harvester without any prior calibration and with a sub-microwatt power consumption. Finally, the favorable comparison between our approach and state-of-the-art solutions (based on magnetic, piezoelectric or mechanical frequency adjustment) confirms the potential of electrically-based frequency tuning
Cutivet, Adrien. "Caractérisation et modélisation de dispositifs GaN pour la conception de circuits de puissance hyperfréquence." Thesis, Lille 1, 2015. http://www.theses.fr/2015LIL10194/document.
Full textAmongst the emerging and developing technologies of the 21st century, wireless transmission is a fundamental aspect for mobile networks, aeronautics, spatial applications and global positioning systems. In that sense, the use of higher frequency bandwidths and increase of transmission channels are aimed by various current research works. Investigated technologies are based upon integrated systems to meet the criteria of devices costs and size. As the cornerstone of such devices, the transistor largely accounts for the final system performance in terms of working frequency, reliability and consumption. To respond to the challenges of today and tomorrow challenges, alternatives to the dominant current silicon process are clearly considered. To date, gallium nitride based technology is found to be the most promising for hyperfrequency power amplification for Ka and W bands given the associated physical and electrical characteristics, prototypes performance and first commercial “off-the-shelf” products. Exploitation of this technology to its full potential requires controlling and mastering the involved fabrication, characterization and modeling steps related to the transistor. This work aims at establishing a methodology enabling a semi-physical modeling of experimental transistors which exhibit state-of-the-art performance. A significant part of this work will also focus on thermal characterization of devices under test and on modeling of passive elements suited for the design of hyperfrequency power circuits
Deshours, Frédérique. "Mise en œuvre d'un système de mesure load-pull à partir d'un analyseur de réseaux à six-portes pour la caractérisation expérimentale des transistors de puissance." Paris 6, 1996. http://www.theses.fr/1996PA066118.
Full textKarami, Armine. "Study of electrical interfaces for electrostatic vibration energy harvesting." Electronic Thesis or Diss., Sorbonne université, 2018. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2018SORUS134.pdf.
Full textElectrostatic vibration energy harvesters (e-VEHs) are systems that convert part of their surroundings' kinetic energy into electrical energy, in order to supply small-scale electronic systems. Inertial E-VEHs are comprised of a mechanical subsystem that revolves around a mobile mass, and of an electrical interface. The mechanical and electrical parts are coupled by an electrostatic transducer. This thesis is focused on improving the performances of e-VEHs by the design of their electrical interface. The first part of this thesis consists in the study of a family of electrical interfaces called charge-pumps conditioning circuits (CPCC). It starts by building a formal theory of CPCCs. State-of-the-art reported conditioning circuits are shown to belong to this family. This family is then completed by a new CPCC topology. An electrical domain comparison of different CPCCs is then reported. Next, a semi-analytical tool allowing for the comparison of CPCC-based e-VEHs accounting for electromechanical effects is reported. The first part of the thesis ends by presenting a novel method for the measurement of e-VEHs' built-in electret potential. The second part of the thesis presents a radically different design approach than what is followed in most of state-of-the-art works on e-VEHs. It advocates for e-VEHs that actively synthesize the dynamics of their mobile mass through their electrical interface. We first show that this enables to convert energy in amounts approaching the physical limits, and from arbitrary types of input vibrations. Then, a complete architecture such an e-VEH is proposed and tested in simulations submitted to human body vibrations
Fernandez, Thomas. "Contribution à l'évaluation de la technique de génération d'harmonique par faisceau laser pour la mesure des champs électriques dans les circuits intégrés (EFISHG)." Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13846/document.
Full textThis work concerns the elaboration of an industrial method for Single Event Effect (SEE) sensitivity testing on integrated circuits. The concerned SEEs are those produced by heavy ions and are mainly Single Event Upset (SEU) and Single Event Latchup (SEL). The original test approach chosen in this study relies on the use of infrared laser pulses striking the backside of the tested device. Laser pulse and heavy ion interaction with semiconductor materials are described and a presentation of the particle accelerator test and some former laser test methods is also given. Advantages and drawbacks of those two techniques are discussed. The developed experimental setup uses a near infrared fiber coupled Neodyme/YAG pulsed laser. Its different elements are described. Using this tool to characterise the SEU sensitivity of several modern SRAMs has allowed to define a test methodology. Its efficiency is discussed and illustrated by different experimental results
Karami, Armine. "Study of electrical interfaces for electrostatic vibration energy harvesting." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS134/document.
Full textElectrostatic vibration energy harvesters (e-VEHs) are systems that convert part of their surroundings' kinetic energy into electrical energy, in order to supply small-scale electronic systems. Inertial E-VEHs are comprised of a mechanical subsystem that revolves around a mobile mass, and of an electrical interface. The mechanical and electrical parts are coupled by an electrostatic transducer. This thesis is focused on improving the performances of e-VEHs by the design of their electrical interface. The first part of this thesis consists in the study of a family of electrical interfaces called charge-pumps conditioning circuits (CPCC). It starts by building a formal theory of CPCCs. State-of-the-art reported conditioning circuits are shown to belong to this family. This family is then completed by a new CPCC topology. An electrical domain comparison of different CPCCs is then reported. Next, a semi-analytical tool allowing for the comparison of CPCC-based e-VEHs accounting for electromechanical effects is reported. The first part of the thesis ends by presenting a novel method for the measurement of e-VEHs' built-in electret potential. The second part of the thesis presents a radically different design approach than what is followed in most of state-of-the-art works on e-VEHs. It advocates for e-VEHs that actively synthesize the dynamics of their mobile mass through their electrical interface. We first show that this enables to convert energy in amounts approaching the physical limits, and from arbitrary types of input vibrations. Then, a complete architecture such an e-VEH is proposed and tested in simulations submitted to human body vibrations
Ouhachi, Rezki. "Mise en oeuvre d'un banc de caractérisation non linéaire dans le domaine fréquentiel pour l'analyse de transistors HBT Si/SiGe : C." Thesis, Lille 1, 2012. http://www.theses.fr/2012LIL10165/document.
Full textThe emergence of satellite communications and radar technologies always require more compact microwave power devices for integration of analog/digital operations on a single chip, reducing the manufacturing cost. As an exemple, since many years heterojunction bipolar transistor (HBT) permits to improve the silicon power transistor performances for microwave applications associated with CMOS technology. In this context, this work focuses on the characterization and modeling of these active devices. For this goal, a non linear bench and a large signal model are developed up to 50 GHz. On the first step, the non-linear measurement is carried out using the NVNA for load-pull measurements on the frequency domain and results are compared with those obtained from the LSNA on the time domain. This instrumental configuration associated with the dynamic operating capabilities of NVNA highlights its advantages and disadvantages. Subsequently, a SiGe HBT device extraction parameters procedure has been validated to establish a large signal model. The originality of this last one is its predictive extraction procedure and fast implementation based on the semiconductors analytical equations. Extraction steps are proven very effective in confrontations with the experimental data of the device under test with the same biases and for different load impedances. At last, thermal currents impacts on microwave power performance are discussed in time and frequency domains
Hedayat, Sara. "Conception et fabrication de neurones artificiels pour le traitement bioinspiré de l'information." Thesis, Lille 1, 2018. http://www.theses.fr/2018LIL1I039/document.
Full textCurrent computing technology has now reached its limits and it becomes thus urgent to propose new paradigms for information processing capable of reducing the energy consumption while improving the computing performances. Moreover, the human brain, is a fascinating and powerful organ with remarkable performances in areas as varied as learning, creativity, fault tolerance. Furthermore, with its total 300 billion cells, is able to perform complex cognitive tasks by consuming only around 20W. In this context, we investigated a new paradigm called neuromorphic or bio-inspired information processing.More precisely, the purpose of this thesis was to design and fabricate an ultra-low power artificial neuron using recent advances in neuroscience and nanotechnology. First, we investigated the functionalities of living neurons, their neuronal membrane and explored different membrane models known as Hodgkin Huxley, Wei and Morris Lecar models. Second, based on the Morris Lecar model, we designed analog spiking artificial neurons with different time constants and these neurons were fabricated using 65nm CMOS technology. Then we characterized these artificial neurons and obtained state of the art performances in terms of area, dissipated power and energy efficiency. Finally we investigated the noise within these artificial neurons, compared it with the biological sources of noise in a living neuron and experimentally demonstrated the stochastic resonance phenomenon. These artificial neurons can be extremely useful for a large variety of applications, ranging from data analysis (image and video processing) to medical aspect (neuronal implants)
Koprnicky, Jan. "Modèles de conductivité électrique pour lampes à décharge." Toulouse 3, 2008. http://thesesups.ups-tlse.fr/171/.
Full textThis Ph. D. Thesis deals with light discharges modelling for description of electric circuits. It is not modelling of internal behaviour of a plasma, but its equivalent conductivity. The parameters of conductivity model are determined from measured voltage and current characteristics of discharge lamps. This model does not require any technological data from lamp producers. The Matlab/Matlab Simulink is used for data processing of u(t); i(t), application of identification algorithms and electric circuits simulation. The simulated results are compared with measurements. The model is tested in simulations of low and high pressure discharge lamps in circuits with magnetic ballasts
Wu, Jiaming. "A modular dynamic Neuro-Synaptic platform for Spiking Neural Networks." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP145.
Full textBiological and artificial neural networks share a fundamental computational unit: the neuron. These neurons are coupled by synapses, forming complex networks that enable various functions. Similarly, neuromorphic hardware, or more generally neuro-computers, also require two hardware elements: neurons and synapses. In this work, we introduce a bio-inspired spiking Neuro-Synaptic hardware unit, fully implemented with conventional electronic components. Our hardware is based on a textbook theoretical model of the spiking neuron, and its synaptic and membrane currents. The spiking neuron is fully analog and the various models that we introduced are defined by their hardware implementation. The neuron excitability is achieved through a memristive device made from off-the-shelf electronic components. Both synaptic and membrane currents feature tunable intensities and bio-mimetic dynamics, including excitatory and inhibitory currents. All model parameters are adjustable, allowing the system to be tuned to bio-compatible timescales, which is crucial in applications such as brain-machine interfaces. Building on these two modular units, we demonstrate various basic neural network motifs (or neuro-computing primitives) and show how to combine these fundamental motifs to implement more complex network functionalities, such as dynamical memories and central pattern generators. Our hardware design also carries potential extensions for integrating oxide-based memristors (which are widely studied in material science),or porting the design to very large-scale integration (VLSI) to implement large-scale networks. The Neuro-Synaptic unit can be considered as a building block for implementing spiking neural networks of arbitrary geometry. Its compact and modular design, as well as the wide availability of ordinary electronic components, makes our approach an attractive platform for building neural interfaces in medical devices, robotics, and artificial intelligence systems such as reservoir computing
Genoulaz, Jérôme. "Contribution à l'Étude du Rayonnement des Câbles Soumis aux Signaux de l'Électronique de Puissance dans un Environnement Aéronautique." Phd thesis, Université des Sciences et Technologie de Lille - Lille I, 2008. http://tel.archives-ouvertes.fr/tel-00440974.
Full textThomas, Fernandez. "CONTRIBUTION A L'EVALUATION DE LA TECHNIQUE DE GENERATION D'HARMONIQUE PAR FAISCEAU LASER POUR LA MESURE DES CHAMPS ELECTRIQUES DANS LES CIRCUITS INTEGRES (EFISHG)." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2009. http://tel.archives-ouvertes.fr/tel-00997396.
Full textChristophe, Cyrille. "Surveillance des systèmes non linéaires : application aux machines électriques." Lille 1, 2001. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/2002/50376-2001-271-272.pdf.
Full textBenmessaoud, Youcef. "Circuit équivalent magnétique non-linéaire adaptatif : 2-D et 3-D avec prise en compte des courants induits." Thesis, Bourgogne Franche-Comté, 2020. http://www.theses.fr/2020UBFCD064.
Full textIn the face of climate change, the automotive industry has aroused particular interest in reducing CO2 emissions.The electrification of vehicles seems to be an essential solution to meet European standards and standardizations. New technological challenges are imposed and spread across the entire electric drive chain, from the battery to the electric motor. In this context, Agence de l’Environnement et la Maitrise de l’Energie is setting a colossal budget to encourage energy transition. In this context, the Conception Optimal des Chaines de traction Electrique project was handled, and whose main coordinator is RENAULT. The thesis fits into the first axis of the project, which aims to model the electric motor component.The main objective of the thesis is two-dimensional and three-dimensional semi-analytical modeling taking into account to eddy-current while the electromagnetic analysis of the electric machine. 2-D and 3-D models based on the method of magnetic equivalent circuits have been developed. Subsequently coupled to ananalytical model allowing the estimation of eddy-current losses within the massive conductive parts. This model would be of assistance during thermal analyzes of static or dynamic electromagnetic devices
Morvan, Riwal. "Modélisation de circuits et systèmes de dimension infinie." Brest, 2000. http://www.theses.fr/2000BRES2009.
Full textMahamoud, Mohamed Aya. "Observation et diagnostic de processus industriels à modèle non linéaire : applications aux machines électriques." Ecole centrale de Nantes, 2010. https://tel.archives-ouvertes.fr/tel-00676588.
Full textThis thesis focuses on the definition of a robust strategy for the diagnosis of industrial processes with nonlinear model. The defined strategy is basedon the use of nonlinear observers not only for diagnosis but also for control of these systems. The aim is threefold. The synthesized observer willreconstruct the state variables, will be sensitive to faults for diagnosis purpose while being robust to disturbances and parametric uncertainties for control purpose. Two observers were studied for this matter. The first observer is a Kalman-like observer. This observer has been applied to detect multiplicative faults for a DC motor series. The stability of the observer for the control and the diagnosis has been proven for two cases of parameters faults. The second observer is a High Gain observer. It hasbeen applied to stator short-circuits fault diagnosis for induction machines. The High Gain observer is used for the diagnosis of induction machine, with and without mechanical sensor. The performance of fault detection algorithms for induction motor has been evaluated on a specific benchmark “Observer for the Diagnosis” defined by the working group Inter GDR CE2. This benchmark is located at IRCCyN
Chaoui, Abdelmadjid. "Filtrage actif triphase pour charges non linéaires." Poitiers, 2010. http://www.theses.fr/2010POIT2296.
Full textThis thesis is in keeping with the general pattern of curative operations in order to improve energy quality and particularly to make up for harmonic pollution, reactive power but also unbalances. A three-phase shunt active power filter (SAPF) constitutes the disturbances mitigation device and a PD3 bridge feeding a type R-L impedance represents the nonlinear load. After a modelling of the SAPF structure, a synthesis on the parameters estimation, such as the DC voltage Vdc, the value of storage capacity Cdc and the coupling inductance or output filter Lf, enabled us to obtain the optimal values of parameters which are exploited in simulation and in an experimental way. With techniques based on tracking control design, a multivariable PLL and a type IP regulator were synthesized and their stability and robustness were confirmed before being introduced into the developed strategies of order. From network currents and voltages measurements respectively isi, vsi, as well as DC voltage Vdc, control techniques were worked out running in current, in voltage and power and analyzed in simulation then validated in laboratory experiment test bench. A detailed comparison is made with criteria as the simplicity of implementation, the stability and the robustness of the order to the various modes balanced and unbalanced, the HF presence and finally the energy quality provided relating to the imposed standards
Mahamoud, Ayan. "Observation et diagnostic de processus industriels à modèle non linéaire : application aux machines électriques." Phd thesis, Ecole centrale de nantes - ECN, 2010. http://tel.archives-ouvertes.fr/tel-00676588.
Full textLamaignere, Laurent. "Etude statique et dynamique de matériaux hétérogènes aléatoires à propriétés électriques non linéaires." Bordeaux 1, 1997. http://www.theses.fr/1997BOR10559.
Full textLamnabhi, Moustanir. "Analyse des systèmes non linéaires par les méthodes de développements fonctionnels." Paris 11, 1986. http://www.theses.fr/1986PA112231.
Full textLefèvre, Anthony. "Contribution à la modélisation électrique, électromagnétique et thermique des transformateurs: Application à l'étude de l'échauffement sur charges non linéaires." Phd thesis, Université de Nantes, 2006. http://tel.archives-ouvertes.fr/tel-00116335.
Full textUne première modélisation s'appuie sur une méthode analytique et axisymétrique permettant le calcul de la distribution des densités de courant dans les enroulements. Puis, après une homogénéisation des conducteurs, une méthode de résolution par éléments finis aboutit à l'obtention de la température en régime permanent. Enfin, la méthode est vérifiée sur un transformateur de type sec et de puissance modérée, associé à un banc expérimental innovant.
Un second modèle propose une nouvelle approche analytique et numérique. Tout d'abord, une méthode des éléments finis 3D (MEF) permet le calcul du champ magnétique. Ce calcul non linéaire est alors associé aux équations de circuit. Puis, une MEF thermique 3D fournie la distribution de température. Finalement, le modèle couplé est appliqué à un transformateur de distribution de petite puissance et instrumenté pour vérifier le suréchauffement engendré par des courants non sinusoïdaux.
Kaiser, Andreas. "Conception de filtres continus CMOS micropuissance et leur application dans un système de mesure de déplacement linéaire." Lille 1, 1990. http://www.theses.fr/1990LIL1A001.
Full textGillet, Vincent. "Développement d'un banc de load-pull actif innovant, utilisant un signal multi-tons large bande pour la mesure de la linéarité (EVM, NPR, ACPR) des dispositifs actifs." Thesis, Limoges, 2019. http://www.theses.fr/2019LIMO0114.
Full textThis manuscript describes an innovative use of the Unequally Spaced Multi-Tones test signal to achieve linearity characterization of telecommunication transmitter (5G). This signal offers new perspectives of characterization using real waveform involving a reduce number of tone test signal, which in turn behaves as an extension of the 2- tone characterization. This innovative test signal is easy to generate, to measure and to analyze. It required not particular expensive hardware to be generated (arbitrary waveform generator, spectrum analyzer). It is particularly interesting for production line testing, from on-wafer measurements up to radiofrequency front-end, passing through packaged transistor. This thesis demonstrated the feasability of automation of multitone measurement, using this particular USMT signal, for load-pull measurement (passive and active) of telecommunications transmitters. Managing this measurement technics represents a competitive advantage at all levels of the radio frequency front-end design and an undeniable financial gain
Yagoub, Mustapha C. E. "Contribution à l'optimisation de circuits microondes non linéaires : application aux multiplicateurs de fréquence." Toulouse, INPT, 1994. http://www.theses.fr/1994INPT104H.
Full text