Dissertations / Theses on the topic 'Circuits de lecture'
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Dupont, Benoît. "Circuits de lecture innovants pour capteur infrarouge bolométrique." Paris 11, 2008. http://www.theses.fr/2008PA112367.
Full textThis PhD work deals with the image quality improvement of Microbolometer infrared detectors by Fixed Pattern Noise Reduction. First the work addresses the problem thermal imaging acquisition with an uncooled technology. We show why the Fixed Pattern Noise is becoming a predominant factor in image quality evaluation based on the state of the Art in bolometric readout circuit design. An algebraic model is then discussed to identify the predominant technological factor in the detector signal dispersion. We show that this critical factor is the resistance prefactor of the bolometer. This statement has been verified through measurement campaigns on existing devices. An algorithm is presented to correct the signal spread introduced by the prefactor. Performance of this algorithm is evaluated and limits are explained. To overcome these limitations, a new mixed mode architecture is developed and validated by simulation. Finally, two circuits aiming at lowering the second order factors are presented and tested. Functionality is demonstrated and limitations are found. Five circuits have been drawn during this work. They are described in this manuscript
Desgeorges, Martial. "Circuits de lecture élaborés pour matrice de photodétecteurs infrarouges." Paris 11, 2002. http://www.theses.fr/2002PA112175.
Full textThe design of CMOS integrated readout circuits for infrared focal plane arrays follows the constant evolution of technologies. The integration capacity , at a given Silicon surface, thus tends to increase, which allows more and more complex design of circuits. A part or all the proximity electronics of the system can be brought back in the focal plane, in order to make the equipment more compact, less heavy, less expensive. . . One of the of the functions to be included is the Analog-Digital conversion. The principal constraints of such converter is the power consumption combine with an accuracy of 14 to 16 bits. We present an original architecture using a converter by column and an another one by pixel. The converter column is a converter built around the classical successive approximation architecture. It was modeled mathematically by taking into account various parasitic effects (charge injection, limited gain, parasitic capacitors, technological dispersions. . . ). It has been designed, fabricated in a standard 0. 5 mM MOS technology, and characterized. An accuracy of 6. 5 bits had been measured. The pixel converter is a type of Sigma-Delta converter. It has also modeled and simulated. The study of this hybrid architecture opens a new way of research to build new elaborated integrated readout circuits
Bourque, Frédéric. "Conception de circuits de lecture adaptés à des dispositifs monoélectroniques." Mémoire, Université de Sherbrooke, 2014. http://hdl.handle.net/11143/5845.
Full textCizel, Jean-Baptiste. "Développement d’un circuit de lecture pour un calorimètre électromagnétique ultra-granulaire." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLX088/document.
Full textThis work takes place in the design project of the electromagnetic calorimeter for the future International Linear Collider (ILC) within the CALICE collaboration. The final calorimeter will be made of 82 million of PIN diodes; this is where the term “high granularity” comes from. The need for a read-out ASIC is a consequence of this high number of detectors, knowing that the dimensions of the electromagnetic calorimeter are a big constraint: the standard electronics is not an option. This work starts from an existing ASIC called SKIROC2. This state-of-the-art read-out chip has been designed by the Omega laboratory, a member of the CALICE collaboration. The performances on testboard and in the detector environment have been measured. It allowed to conclude on the advantages and drawbacks of using SKIROC2 in the calorimeter. After that the focus has been made on the design of a new read-out chip based on SKIROC2. The main goal was to preserve the good performances of SKIROC2 while trying to correct the encountered issues. This new ASIC has been developped in a newly released technology available during the design phase. Therefore the design has been started from scratch. The final chip is composed of building blocks rather than a ready-to-use read-out chip. Three charge preamplifier designs have been tested, the general architecture of a read-out channel being largely inspired by SKIROC2
Varizat, Laurent. "Circuit de lecture d'un magnétomètre à induction pour l'étude de plasmas atmosphériques sur la mission JUICE." Electronic Thesis or Diss., Paris 6, 2017. http://www.theses.fr/2017PA066536.
Full textInduction magnetometers are used in many fields of scientific exploration from geophysics to astrophysics. In these two fields, the study of the magnetic components of natural electromagnetic waves requires particularly powerful instruments: sensitive and with low intrinsic noises to access magnetic fields of some fT/ . In the case of scientific instruments carried on satellites, constraints on temperature, consumption, congestion and radiation resistance are added to the other constraints. Integrated circuit technologies allow technological breakthrough, which results in a reduction in the size of embedded electronic circuits by a factor greater than 1000, while improving electrical and instrumental performances (reduction in consumption, noise sources, bandwidth and hardening of the electronics). A first thesis at the L2E (A. Rhouni) showed the relevance of a CMOS technology for this type of instrumentation. In this thesis, we describe the study conducted on integrated circuits subject to environmental constraints related to the future missions in which this type of instrument must be embarked (Mission JUICE of ESA). These constraints are becoming more and more severe (radiation dose > 300krad, temperature less than 100 Kelvin ...), taking into account throughout the design process is necessary. A modeling of the effects of these constraints on the components of the integrated circuits technology has been carried out in order to be able to take these effects into account from the design stage. Finally, these models were used to design an induction magnetometer readout circuit for space instrumentation
Varizat, Laurent. "Circuit de lecture d'un magnétomètre à induction pour l'étude de plasmas atmosphériques sur la mission JUICE." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066536/document.
Full textInduction magnetometers are used in many fields of scientific exploration from geophysics to astrophysics. In these two fields, the study of the magnetic components of natural electromagnetic waves requires particularly powerful instruments: sensitive and with low intrinsic noises to access magnetic fields of some fT/ . In the case of scientific instruments carried on satellites, constraints on temperature, consumption, congestion and radiation resistance are added to the other constraints. Integrated circuit technologies allow technological breakthrough, which results in a reduction in the size of embedded electronic circuits by a factor greater than 1000, while improving electrical and instrumental performances (reduction in consumption, noise sources, bandwidth and hardening of the electronics). A first thesis at the L2E (A. Rhouni) showed the relevance of a CMOS technology for this type of instrumentation. In this thesis, we describe the study conducted on integrated circuits subject to environmental constraints related to the future missions in which this type of instrument must be embarked (Mission JUICE of ESA). These constraints are becoming more and more severe (radiation dose > 300krad, temperature less than 100 Kelvin ...), taking into account throughout the design process is necessary. A modeling of the effects of these constraints on the components of the integrated circuits technology has been carried out in order to be able to take these effects into account from the design stage. Finally, these models were used to design an induction magnetometer readout circuit for space instrumentation
Degerli, Yavuz. "Étude, modélisation des bruits et conception des circuits de lecture dans les capteurs d'images à pixels actifs CMOS." École nationale supérieure de l'aéronautique et de l'espace (Toulouse ; 1972-2007), 2000. http://www.theses.fr/2000ESAE0009.
Full textMraihi, Salmen. "Prise en compte de la variabilité dans l’étude et la conception de circuits de lecture pour mémoires résistives." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS218.
Full textNowadays, Systems on chip (SoCs) conception is becoming more and more complex and demand an ever-increasing amount of memory capacity. This leads to aggressive bit cell technology scaling. Nonvolatile resistive memories (PC-RAM, RRAM, MRAM) are promising technologic alternatives to ensure both high density, low power consumption, low area and low latencies. However, scaling lead to significant memory cell and/or memory periphery variability. This thesis aims to address variability issues in read circuitries of resistive memories and propose solutions for read yield enhancement of these memories. To this end, several sub-studies were achieved: overall review of the existing solutions for read yield enhancement, at both circuit and system level; development of a statistical model evaluating the contributions to read margin of the variability of each component of the resistive memory sensing path; analysis, characterization modelling and optimization of the offset of one particular dynamic sense amplifier for resistive memories; proposal of a sense amplifier architecture that features an optimum signal to offset ratio
Mbow, Ndeye Awa. "Conception et intégration en technologie CMOS d'un circuit de lecture et d'identification de coïncidences à résolution temporelle de l'ordre de la nanoseconde destiné à l'imagerie biomédicale." Strasbourg, 2009. https://publication-theses.unistra.fr/restreint/theses_doctorat/2009/MBOW_Ndeye_Awa_2009.pdf.
Full textThe sequencing of the human genome and the genome of the mouse has shown that among the 30,000 genes that have human and mouse, only 300 are different. This remarkable similarity makes possible to study the development of diseases such as cardiovascular disease, cancer, neurodegenerative diseases, namely Alzheimer's or Parkinson's disease on mice. Thus, mouse models representing the human diseases have been multiplied. Molecular imaging which couples both anatomical and functional information has become an indispensable tool in biomedical research. One of the main researches of ImaBio's group of the Hubert Curien Pluridisciplinary Institute (IPHC) is developing a preclinical multimodal imaging system named AMISSA (A Multimodality Imaging System for Small Animal) and dedicated to small animal. This multimodal technology research is an innovative solution to biology issues. For the PET (Positron Emission tomography) modalities that should be integrated in the platform AMISSA, the number of channels (6144) of the proposed system and the size of the object imaged that will be fit on a diameter of 6 cm require an integrated electronic readout. The PET imaging system is designed to achieve a spatial resolution of 1 mm3 with detection efficiency better than 15%. Due to the geometry considered for the detector, its readout electronic should be able to achieve a large dynamic range from a few femto Coulombs to 104 pC for the measure of charges and an accurate measurement of the arrival time of signal with a precision better than 1 ns to make a narrow time coincidence window in order to reduce random coincidences. My contribution in this project is to participate in the development of this dedicated electronic module detection of the micro PET and also to characterize it. An ASIC prototype of 10 channels named IMOTEPA for the charge measurement and another of 16 channels named IMOTEPD dedicated to time stamp the photons have been developed in AMS CMOS 0. 35 µm. These two chips allowed us to validate separately the analogue part and the digital one of the photodetector's readout electronic. The final objective is to reach a single ASIC performing simultaneously both of these functions. Measured Integral Non-Linearity (INL) less than 3%, a crosstalk around 0. 2% for IMOTEPA and also jitter of about 120 ps RMS and Differential Non-Linearity of about ±0. 35 LSB for IMOTEPD, meet the specifications. These measures allow integrating a 64 channels prototype named IMOTEPAD which is under development in the laboratory. This manuscript provides a description of the ASICs IMOTEPA and IMOTEPD and presents the measurement results associated to them
Dahoumane, Mokrane. "Conception, réalisation et caractérisation de l’électronique intégrée de lecture et de codage des signaux des détecteurs de particules chargées à pixels actifs en technologie CMOS." Strasbourg, 2009. http://www.theses.fr/2009STRA6236.
Full textThe future big experiments for exploring the fundamental laws of the Nature (e. G. International Linear Collider, ILC) require Vertex Detectors of high spatial resolution and granularity, very thin and radio-tolerant, which are out of reach of the current detection technologies. This observation is at the origin of the development of a novel technology, CMOS Active Pixel Sensors. The spatial resolution of the sensor is a major performance. It results from the sharing of the charges created by a charged particle when it crosses -and ionizes- the sensitive volume. The encoding of the charge collected by each pixel bases on an ADC (Analog-to-Digital Converter), which must be integrated on the substrate sheltering the sensitive volume of the sensor. This ADC must be precise, compact, fast and dissipating low power. The objective through this thesis was to design an ADC fulfilling these conflicting requirements. First, several architectures of a sample-hold-amplifier were studied for conditioning the low signal coming from the pixel. An original architecture of this stage was designed. The pipelined architecture was chosen to develop the ADC. The basic configuration 1. 5 bit/stage was implemented to test the validity of the concept, because it allows minimizing the constraints of each single stage. We optimized the ADC pipelined architecture by introducing the double sampling concept on a configuration of 2. 5 bits/stage, this allowed to minimize the dimensions and the power. The double sampling combined with the 1. 5 bit inter-stage resolution constituted a second improvement of the ADC architecture. A new architecture of the ADC adapted to the pixel command sequence was proposed
De, Nardi Christophe. "Techniques d'analyse de défaillance de circuits intégrés appliquées au descrambling et à la lecture de données sur des composants mémoires non volatiles." Toulouse, INSA, 2009. http://eprint.insa-toulouse.fr/archive/00000307/.
Full textProtection of data stored on integrated circuit memories is a major preoccupation of our society. Today, these circuits are everywhere, from electronics for the general public (SIM charts, USB flash memories), to satellites, bank cards and numerical passports. This thesis strives to answer the following question: “Is it possible to physically read the information stored in a non volatile memory (NVM)?”. Contrary to software attacks, physical approaches (hardware) destroy components. To reach the information contained in the core of a memory, this progressive destruction must be controlled. We have developed a four stage method adapted to each NVM family: 1) technological analysis, 2) address descrambling, 3) sample preparation to make data accessible and 4) data reading. The difficulty and complexity of this work can be better understood if we start with the desired result. For example, the data (0 or 1) of flash memory cell corresponds to the presence/absence of a charge of several hundred electrons stored on the floating gate of a transistor. Detecting the correct value requires a technique with strong topographic and potential resolution, which is as non invasive as possible to avoid erasing the electrons which are by nature, highly mobile. For current memory technologies (node ≥90nm), we show that passive voltage contrast (PVC) or electric modes of Atomic Force Microscopy (AFM) are adapted to these constraints. With this approach, stage n°3 of sample preparation is the key step to expose storage location of programmed charges without losing them. The method described in this thesis is based on a functional and physical characterization of memories coupled with an understanding of component preparation and analysis techniques. The experience gained over the past three years shows the importance of choosing the right reading technique and adjusting parameters according to the type of memory to be analyzed. For future technologies (node ≤65nm) or silicon on insulator (SOI), our method should remain applicable
Michalowska, Alicja. "Étude et développement d’ASIC de lecture de détecteurs matriciels en CdTe pour application spatiale en technologie sub-micrométrique." Thesis, Paris 11, 2013. http://www.theses.fr/2013PA112332/document.
Full textThe work presented in this thesis is part of a project where a new instrument is developed: a camera for hard X-rays imaging spectroscopy. It is dedicated to fundamental research for observations in astrophysics, at wavelengths which can only be observed using space-borne instruments. In this domain the spectroscopic accuracy as well as the imaging details are of high importance. This work has been realized at CEA/IRFU (Institut de Recherche sur les lois Fondamentales de l’Univers), which has a long-standing and successful experience in instruments for high energy physics and space physics instrumentation. The objective of this thesis is the design of the readout electronics for a pixelated CdTe detector, suitable for a stacked assembly. The principal parameters of this integrated circuit are a very low noise for reaching a good accuracy in X-ray energy measurement, very low power consumption, a critical parameter in space-borne applications, and a small dead area for the full system combining the detector and the readout electronics. In this work I have studied the limits of these three parameters in order to optimize the circuit.In terms of the spectral resolution, two categories of noise had to be distinguished to determine the final performance. The first is the Fano noise limit. related to detector interaction statistics, which cannot be eliminated. The second is the electronic noise, also unavoidable; however it can be minimized through optimization of the detection chain. Within the detector, establishing a small pixel pitch of 300 μm reduces the input capacitance and the dark current. This limits the effects of the electronic noise. Also in order to limit the input capacitance the future camera is designed as a stacked assembly of the detector with the readout ASIC. This allows to reach extremely good input parameters seen by the readout electronics: a capacitance in range of 0.3 pF - 1 pF and a dark current below 5 pA.In the frame of this thesis I have designed two ASICs. The first one, Caterpylar, is a testchip, which enables the characterization of differently dimensioned CSA circuits to choose the most suitable one for the final application. It is optimized for readout of the target CdTe detector with 300 μm pixel pitch and the corresponding input parameters. With this circuit I have also analyzed possible filtering methods, in particular the semi-Gaussian shaping and the Multi-Correlated Double Sampling (MCDS). Their comparison is preceded by the theoretical analysis of these shapers. The second ASIC D2R1 is a complete readout circuit, containing 256 channels to readout CdTe detector with the same number of pixels, arranged in 16×16 array. Each channel fits into a layout area of 300 μm × 300 μm. It is based on the MCDS processing with self-triggering capabilities. The mean electronic noise measured over all channels is 29 electrons rms when characterized without the detector. The corresponding power consumption is 315 μW⁄channel. With these results the future measurements with the detector give prospects for reaching an FWHM spectral resolution in the order of 600 eV at 60 keV
Michal, Vratislav. "Conception de circuits intégrés CMOS analogiques pour l'électronique de lecture de capteurs bolométriquesThz à base de semiconducteurs ou de supraconducteurs à haute température critique." Paris 6, 2009. http://www.theses.fr/2009PA066200.
Full textSen, Hanife Can. "An Aptitude Treatment Interaction Study: The Effect Of Inquiry Based Instruction And Lecture Instruction On High School Students'." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/3/12612016/index.pdf.
Full textcognitive styles (field-dependent, field-mixed, and field-independent) and with other independent variables on 11th grade students&rsquo
physics achievement in and attitude toward electric circuits concepts in central district of Aydin. Lesson plans, instructional materials were developed for the inquiry-based instruction. Teachers&rsquo
regular classroom practices were accepted as lecture method. Physics achievement test, physics attitude scale, observation checklists, and GEFT were used as data collection instruments. Treatment was implemented to 298 11th grade students in central district of Aydin. Physics achievement test and physics attitude scale were administered to the students as pre and post tests while GEFT was administered only as pre test. MANCOVA was used as statistical analysis method to analyze data. The dependent variables of this study were the achievement (PSTACH) and attitude (PSTATT) scores of the students. The covariate and gender were used to statistically equalize the students&rsquo
characteristics. Group membership with respect to two groups (inquiry or lecture groups) was named here as &ldquo
MOI
methods of instruction&rdquo
(2 level categorical) and used as fixed factor of this study with the other group membership variables, students&rsquo
physics achievement pretest scores (PREACH), physics attitude pretest scores (PREATT), School, previous physics course grades (PPCG), cognitive style (CoS, 3 level categorical), and the interaction terms of MOI*PREACH, MOI*PPCG, PREATT*MOI*PPCG*CoS, MOI*PPCG*CoS, PREACH*School, and PREACH*PREATT. In general, inquiry instruction was effective than the lecture instruction with respect to PSTACH in electric circuits subject. However, there was not a significant difference in effectiveness of both methods in improving students&rsquo
attitudes toward electric circuits subject. In essence, each method of instruction was not effective on improving students&rsquo
attitudes toward electric circuits subject. Although, this study could not find any statistically significant interaction effect of MOI and other independent variables on students&rsquo
PSTATT scores, practical significance was investigated for the interaction terms.
Ngueya, Wandji Steve. "Conception de circuits mémoires flash pour plateforme ultra faible consommation." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0586.
Full textThe market of secure connected devices is booming and requires low power development platforms for contactless applications in reduced form factors. The reduction in the form factor impacts the antenna size and thus leads to a decrease of the energy available in the chip, which should reduce drastically its consumption while keeping performances. One of the main contributors to the chip consumption is the embedded non-volatile memory (eNVM) used for storage and code execution. Therefore, for a given technology, it is necessary to design peripheral blocks of the memory array under strong consumption constraints. The aim of the thesis is to select a very low-power embedded nonvolatile memory technology compatible with the classical CMOS process, to identify the critical blocks during the operations of the memory, and finally to propose solutions to minimize the power consumption of each critical block.In order to do this, a study of all the embedded non-volatile memories available on the market is carried out. It emerges that the Flash technology, in particular the SuperFlash® ESF3 based NOR Flash technology, is best suited for remote-powered systems. The study of the NOR Flash macrocell shows that during write and erase operations, the system consumption is mainly related to the high voltage generation by charge pumps. However, during a read operation, overall performances of the system is determined by the sense amplifier. A design work for each individual block is then implemented to reduce consumption
Ngueya, Wandji Steve. "Conception de circuits mémoires flash pour plateforme ultra faible consommation." Electronic Thesis or Diss., Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0586.
Full textThe market of secure connected devices is booming and requires low power development platforms for contactless applications in reduced form factors. The reduction in the form factor impacts the antenna size and thus leads to a decrease of the energy available in the chip, which should reduce drastically its consumption while keeping performances. One of the main contributors to the chip consumption is the embedded non-volatile memory (eNVM) used for storage and code execution. Therefore, for a given technology, it is necessary to design peripheral blocks of the memory array under strong consumption constraints. The aim of the thesis is to select a very low-power embedded nonvolatile memory technology compatible with the classical CMOS process, to identify the critical blocks during the operations of the memory, and finally to propose solutions to minimize the power consumption of each critical block.In order to do this, a study of all the embedded non-volatile memories available on the market is carried out. It emerges that the Flash technology, in particular the SuperFlash® ESF3 based NOR Flash technology, is best suited for remote-powered systems. The study of the NOR Flash macrocell shows that during write and erase operations, the system consumption is mainly related to the high voltage generation by charge pumps. However, during a read operation, overall performances of the system is determined by the sense amplifier. A design work for each individual block is then implemented to reduce consumption
Yap, San Min Michael. "Analyse statistique de l'impact des variations locales sur les courses de signaux dans une mémoire SRAM embarquée." Montpellier 2, 2008. http://www.theses.fr/2008MON20001.
Full textGasquez, Julien. "Conception de véhicules de tests pour l’étude de mémoires non-volatiles émergentes embarquées." Electronic Thesis or Diss., Aix-Marseille, 2022. http://www.theses.fr/2022AIXM0419.
Full textPhase change memory (PCM) is part of the strategy to develop non-volatiles memories embedded in advanced technology nodes (sub 28nm). Indeed, Flash-NOR memory is becoming more and more expensive to integrate in technologies with high permittivity dielectrics and metallic gates. The main objective of this thesis is therefore to realize tests vehicles in order to study an innovative PCM + OTS memory point and to propose solutions to fill its gaps and limitations according to the envisaged applications. The study is based on two different technologies: HCMOS9A and P28FDSOI. The first one is used as support for the development of a technological validation vehicle of the OTS+PCM memory point. The second one is used to demonstrate the surface obtained with an aggressive sizing of the memory point. Finally, an optimized readout circuit for this memory point has been realized allowing the compensation of leakage currents as well as the regulation of the bias voltages of the matrix during the reading
Deng, Shi-Ming. "Etude de conception d’ASICs de lecture et d’étiquetage en temps associés à des photomultiplicateurs pour un hodoscope de faisceau en hadronthérapie." Thesis, Lyon 1, 2012. http://www.theses.fr/2012LYO10246/document.
Full textTo develop a beam hodoscope in hadrontherapy, able to localize the beam position and to get a time tagging with a accuracy of ~ 1ns at a count rate of 100 000 000 HZ, we have studied and designed read-out ASICs' (Application Specific Intergrated Circuits) to be associated with multi-anode photomultiplier. One of 16-channel front-end ASIC in 0,35 µm AMS BICMOS process ahs been designed, fabraicated and tested. Each channel consists to a current coveyor (with two current outputs) as an input stage, and two separat output stages wich are a current comparator and a charge-sensitive amplifier (CSA) respectively. It performs both signal-event detection and signal charge quantification. The design work includes optimization of circuit performances such as input dynamic range, power dissipation; speed and noise. The circuit has also ben incorporated in a test system and its opration has been verified by beam experimentation. On the other hand, we have also designed another ASIC in a 0.35 µm AMS CMOS process. Itn is based on an analog DLL (Delay Locked Loop) with implementation of the TOF (Time Of Flight) measuring method. It has a LVDS (Low Voltage Differential Signaling) clock input mode and a 5-bit Gray-code output. It operates with 200-ps timing rsolution according to test results. These studies have led us to launch a new design project: integrating the studied and validated electronic functions on a single chip
Mehrez, Fatima. "Design and test of a readout ASIC for a SiPM - based camera : ALPS (ASIC de lecture pour un photodétecteur SiPM)." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAT131/document.
Full textThis thesis is the R&D on front-end electronics for a second generation camera based on the SiPM detectors for the Large Size Telescope (LST) of the CTA project. It is a part of the SiPM collaboration involving the LAPP, the University of Padua, the INFN and the MPI in Munich. The first part of the thesis is the characterization of an array of 16 SiPMs from Hamamatsu. The study proves the advantages of using such detectors in the LST. It defines the specifications of the readout electronics that are the aim of this work. Especially that it should ameliorate the gain dispersion of the 16 pixels that was found of about 10%. The second part is the design of the readout ASIC. The scheme tends to measure the SiPMs’ signals with minimum disturbance of the detector. It integrates slow control facilities that adjust the detector’s gain, minimize the dispersion in gain and provide the possibility of deleting noisy channels or even completely jumping over the control process. These facilities could perfectly get rid of the gain dispersion. Outputs of the 16 pixels will be summed on both high gain and low gain so that only two signals are delivered to the acquisition system that follows. A trigger function will also generate a trigger signal to the acquisition system. The choice was made to realize this ASIC according to the rules of the AMS 0.35um BiCMOS technology. Simulation shows a linearly-covered dynamic range up to 2000 photoelectrons with good signal to noise ratio that allows the measurement of the single photoelectron. Laboratory tests confirm a great part of these results
Wright, Thomas Fitzpatrick. "Britain on the American popular lecture circuit 1844-1865." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608897.
Full textLizotte, Sylvie. "Étude descriptive de l'emploi du circuit de lecture en vulgarisation scientifique." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ61802.pdf.
Full textLizotte, Sylvie. "Étude descriptive de l'emploi du circuit de lecture en vulgarisation scientifique." Mémoire, Université de Sherbrooke, 2000. http://savoirs.usherbrooke.ca/handle/11143/2197.
Full textLizotte, Sylvie. "Étude descriptive de l'emploi du circuit de lecture en vulgarisation scientifique." Sherbrooke : Université de Sherbrooke, 2001.
Find full textLAPRAS, POUTEAU VALERIE. "Circuit optique integre de lecture et ecriture pour disques a memoires magneto-optiques." Paris 11, 1993. http://www.theses.fr/1993PA112136.
Full textLemaire, William. "Conception d’un circuit de lecture à étampes temporelles multiples pour un photodétecteur destiné à la tomographie d’émission par positrons." Mémoire, Université de Sherbrooke, 2018. http://hdl.handle.net/11143/11814.
Full textMichalowska, Alicja. "Étude et développement d'ASIC de lecture de détecteurs matriciels en CdTe pour application spatiale en technologie sub-micrométrique." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00956027.
Full textZHANG, BO. "Developpement d'un circuit integre vlsi assurant mesure de temps et lecture selective dans l'electronique frontale du compteur dirc de l'experience babar a slac." Paris 6, 1997. http://www.theses.fr/1997PA066736.
Full textPalacios-Laloy, Agustin. "Bits quantiques supraconducteurs et résonateurs : test de l'intégralité de Legget-Garg et lecture en un coup." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2010. http://tel.archives-ouvertes.fr/tel-00815078.
Full textArpin, Louis. "Conception et intégration d'une architecture numérique pour l'ASIC LabPET[indice supérieur TM] II, un circuit de lecture d'une matrice de détection TEP de 64 pixels." Mémoire, Université de Sherbrooke, 2012. http://hdl.handle.net/11143/6148.
Full textHeini, Sébastien. "Conception et intégration d’un capteur à pixels actifs monolithiques et de son circuit de lecture en technologie CMOS submicronique pour les détecteurs de position du futur." Strasbourg, 2009. http://www.theses.fr/2009STRA6045.
Full textThe thesis work, presented in this manuscript, was carried out for the development of the CMOS sensors which are foreseen to equip future vertex detector of the CBM experiment at FAIR (GSI, Darmstadt). First, we present new ionising particles detection circuits working in current mode: PhotoFETs. They were developed in order to improve the performances of the CMOS sensors, in particular the sensitivity and readout speed. Second, we present a new architecture of Double ramp Analogue-to-Digital Converter (ADC) with 4 bits resolution. Its integration into the CMOS sensors imposes specific constraints on the design of ADC: minimal material budget (layout size), severe limits on the power consumption and the conversion time. This contribution succeeded in good experimental results which open interesting perspectives for the integration of PhotoFETs and Double Ramp ADC in to CMOS sensors, in particular by using Very Deep Submicronic technologies and 3D technology
Heini, Sébastien Hu Yann Winter Marc. "Conception et intégration d'un capteur à pixels actifs monolithiques et de son circuit de lecture en technologie CMOS submicronique pour les détecteurs de position du futur." Strasbourg : Université de Strasbourg, 2009. http://eprints-scd-ulp.u-strasbg.fr:8080/1128/01/HEINI_Sebastien_2009_restrict.pdf.
Full textTrapp, Franziska. "Lectures de cirque contemporain : un modèle d'analyse des représentations circassiennes axé sur des textes et contextes." Thesis, Montpellier 3, 2019. http://www.theses.fr/2019MON30002.
Full textIn 1996, the Paris newspaper Libération predicted a third era of circus after visiting the seventh edition of the Centre National des Arts du Cirque: “After traditional and new circus, we now have to account for contemporary circus.” The prognosis became reality: nowadays, in France as elsewhere, the performance of Joseph Nadj is considered as the starting point of a new genre whose definition however remains vague: “The contemporary circus has no formal unity. It is paradoxically the diversity of its forms that unifies the genre.” On the one hand, this is explained by the fact that originality is a central motor in contemporary circus; on the other hand, the genre is still developing . A further reason for the lack of a clear definition lies in the absence of detailed analyses of contemporary circus performances in circus research, and in the desideratum regarding a coherent model for its interpretation. The current discourse dedicated to the genre is less interested in knowing how contemporary circus performances generate meaning and in outlining the characteristic techniques and processes. Instead, one wonders what should characterize the performances. The present thesis takes into account this desideratum by developing for the first time a method to analyse representations of contemporary circus. In addition, it resolutely explains and interprets the genre by means of a contextualized description of the object - namely representation - in its historical and cultural context. In the Lessingian sense of the term, the thesis therefore provides a dramaturgy of contemporary circus which, despite the diversity of representations, reveals generalizable characteristics of the genre, the fundamental techniques and structures of the performances. and the effects they produce. The development of a reading model for contemporary circus performances as well as the consequent evolution and the specification of the model are grounded in the textual analysis of poetics of culture that the literary scholar Moritz Baßler justifies in his work on the basis of the theory of New Historicism designed by Stephen Greenblatt. In addition, the present work situates itself in the field of reading theories pertaining to theatre (Fischer-Lichte ) and dance studies (Foster and Brandstetter ). The core of the argument is based on the assumption that circus performances are readable as cultural texts
Estes, Kevin M. "Solo and Chamber Percussion Works by Nigel Westlake: An Examination of Fabian Theory, The Hinchinbrook Riffs, The Invisible Men, Kalabash, Malachite Glass, Moving Air, Omphalo Centric Lecture and Penguin Circus." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397567270.
Full textRyan-Sautour, Michelle. "Le jeu didactique et l'effet sur le lecteur dans the passion of new eve (1977) et nights at the circus (1984) d'angela carter." Angers, 2000. http://www.theses.fr/2000ANGE0014.
Full textFiasson, Armand. "Recherche de l'origine des rayons cosmiques par l'étude d'associations de vestiges de supernova et de nuages moléculaires avec HESS et validation du circuit d'échantillonnage de HESS II." Phd thesis, Montpellier 2, 2008. http://www.theses.fr/2008MON20083.
Full textThe H. E. S. S. Telescope (High energy Stereoscopic System), located in Namibia, is currently the most efficient observatory of very high energy (VHE) gamma-ray sources. It consists in 4 large diameter telescopes working in stereoscopic mode and allows an unequaled survey of the galactic plane at these extreme wavelenghts. The H. E. S. S. Experiment showed the presence of high energy particles up to 100 TeV within supernova remnant. This astrophysical objects are believed to be the main particle accelerator within the Galaxy. However, the nature hadronic or leptonic of these particles remains unclear. This thesis presents a new observationnal approach in order to show hadronic particles acceleration through diffusive shock within supernova remnants. A search of supernova remnants associated with molecular clouds has been led within the HESS source catalog and the H. E. S. S. Observations. An analysis of the new VHE gamma-ray source in Monoceros and its interpretation are presented. Then, the analysis and interpretation of new observations of the unidentified source HESS J1745-303 are presented. Finally, the multi-wavelength analysis of the new source HESS J1714-385, coincident with the supernova remnant CTB 37A is presented. Moreover, I have shown a gamma-ray excess towards OH masers, which are believed to indicate association between supernova remnant and molecular clouds. A contribution to the H. E. S. S. Phase II building is also presented. This second phase consists in the building of a fifth telescop at the center of the existing system. The series tests of the new camera sampling system are reported
Fiasson, Armand. "Recherche de l'origine des rayons cosmiques par l'étude d'associations de vestiges de supernova et de nuages moléculaires avec HESS et validation du circuit d'échantillonnage de HESS II." Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2008. http://tel.archives-ouvertes.fr/tel-00660134.
Full textSafi, Dima. "Investigation des circuits neuronaux de la lecture à l’aide de la spectroscopie près du spectre de l’infrarouge." Thèse, 2012. http://hdl.handle.net/1866/8828.
Full textFor most people, reading is a smooth, automatic activity that is part of their everyday life. For individuals suffering from reflex reading epilepsy, this simple activity triggers seizures and these individuals have no other alternatives than to stop reading. The factors responsible for triggering epileptic activity in reflex reading epilepsy remain unspecified. Some authors suggest that the number and the localization of spikes would vary according to the reading pathway. Cerebral imaging studies conducted in populations without neurological disorders have revealed that reading involves an extensive cerebral network including the frontal, temporo-parietal and occipito-temporal regions bilaterally, with differences in activation patterns for the lexical and the phonological reading pathways. Most studies have resorted to silent reading tasks that do not allow researchers to assess the performance of the participants. In the first study in this dissertation, we determined the language tasks and characteristics of the stimuli that influenced epileptic activity in a patient with primary reading epilepsy. The results confirmed that reading was the language task responsible for triggering most of the epileptic activity in this patient. More specifically, spike frequency was significantly higher when the patient read the stimuli by resorting to the grapheme-to-phoneme conversion mechanisms. The electroencephalography (EEG) recordings revealed that spikes were located in the left precentral gyrus for both reading pathways. The second study aimed at developing and validating a protocol using near-infrared spectroscopy (NIRS) to investigate the neural correlates of reading aloud in competent readers. Twelve adults without reading impairments or neurological disorders read aloud irregular words and nonwords during NIRS recordings. The results showed that irregular word and nonword reading involved common bilateral cerebral regions that included the inferior frontal gyrus, the premotor and motor gyri, the somatosensory supplementary cortex, the middle and superior temporal gyri, the supramarginal gyrus, the angular gyrus, and the visual cortex. The total hemoglobin concentrations (HbT) measured in the bilateral inferior frontal gyri were higher when participants read nonwords than when they read irregular words. This finding indicates that the inferior frontal gyri play a role in the grapheme-to-phoneme conversion mechanism, mostly involved in the phonological reading pathway. This study confirms the potential of NIRS in investigating the neural correlates of the two reading pathways. A significant outcome of this dissertation is that NIRS constitutes an excellent technique in studying reading aloud. Further NIRS investigations in reading should help determine the neural correlates of reading in children and adults with developmental and acquired dyslexia.
JHA, RAVI RATAN. "STUDY OF LEAKAGE POWER REDUCTION TECHNIQUES IN CMOS CIRCUITS." Thesis, 2023. http://dspace.dtu.ac.in:8080/jspui/handle/repository/19897.
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