Academic literature on the topic 'Instrumentation Electronics and Microelectronics'

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Dissertations / Theses on the topic "Instrumentation Electronics and Microelectronics"

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Michal, Vratislav. "Design of CMOS analog integrated circuits as readout electronics for High-TC superconductor and semiconductor terahertz bolometric sensors." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2006. http://tel.archives-ouvertes.fr/tel-00417838.

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Cette thèse porte sur la conception d'un circuit intégré CMOS pour l'électronique de lecture de capteurs bolométriques à base de semiconducteurs ou supraconducteurs haute-température. Dans ce manuscrit, une chaîne de traitement du signal est étudiée. Elle est composée d'un amplificateur différentiel à gain fixé pour des températures de 40 à 400K, ainsi que d'un filtre de fréquence passe-bas actif à haute dynamique. Une architecture optimale d'amplificateur est définie sans contre-réaction, permettant d'atteindre une large bande passante (17MHz pour un gain de 40dB), une consommation réduite (Iq = 2mA) et une haute impédance d'entrée. Afin de fixer le gain avec précision dans la structure CMOS, deux méthodes différentes sont présentées et vérifiées sur un circuit intégré. Par la suite, le comportement des filtres dans la bande d'atténuation est étudié afin d'augmenter la fréquence de coupure maximale. Deux structures avec une faible influence des éléments actifs « réels » sont conçues: le filtre Sallen-Key amélioré et la structure basée sur un convoyeur du courant CCII-. Enfin, nous présentons un CCII- intégré en CMOS ayant une très faible impédance de sortie.
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Jomaa, Tarek Chaker. "Instrumentation electronics for biosensor applications." Thesis, Cardiff University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.344011.

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Zubair, Muhammed 1962. "Aluminoborophosphosilicate glasses for microelectronics packaging." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/277898.

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Glasses are used in microelectronic packaging for insulation and passivation purposes. To optimize the performance of these packages, it is necessary to investigate new glasses or improve on properties of the glasses in use. The insulating glass should have low dielectric constant, low dissipation factor, low glass transition temperature, high chemical resistivity, and a thermal expansion coefficient matching the substrate. In this study, various aluminoborophosphosilicate glasses containing Ca(Mg)O, Ca(Mg)F₂, and AlF₃ as flux were investigated. Processing temperatures for these glasses range from 1300°C to 1500°C. The coefficients of thermal expansion range from 4.52 μ/°C to 9.39 μ/°C. The dielectric constant as a function of frequency and composition is in the range of 4.1 to 5.2. The index of refraction for these glasses is in the range of 1.52 to 1.58. Glass transition and softening temperatures as low as 538°C and 622°C, respective, were found. Results of this investigation are discussed in terms of the possible use of aluminoborophosphosilicate glasses in microelectronic packaging.
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Nagarathnam, Premkumar. "Novel carbon nanotube thermal interfaces for microelectronics." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31720.

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Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2010.<br>Committee Chair: Graham, Sam; Committee Member: Joshi, Yogendra; Committee Member: Kalaitzidou, Kyriaki. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Hartzell, Brittany M. "DNA manipulation and characterization for nanoscale electronics." Ohio : Ohio University, 2004. http://www.ohiolink.edu/etd/view.cgi?ohiou1108051644.

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Chen, Si. "Conception d’ASICs Mixtes Durcis aux Radiations pour Observatoires Spatiaux." Thesis, Université de Paris (2019-....), 2019. http://www.theses.fr/2019UNIP7051.

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Le sujet de ma thèse est la conception d’ASICs (Application-Specific Integrated Circuits) mixtes durcis aux radiations pour observatoires spatiaux. La thèse se déroule dans le contexte d'un futur observatoire spatial à rayons X de l’ESA, se nomme « Advanced Telescope for High ENergy Astrophysics (ATHENA) ». Les ASICs développés appartiennent à l'un des deux instruments scientifiques de cet observatoire, s’appelle « X-ray Integral Field Unit (X-IFU) », et sont dédiés à l'un des sous-systèmes de l'instrument X-IFU, le WFEE (Warm Front End Electronics).Le WFEE est un système électronique mixte comprenant principalement un amplificateur à bas bruit (LNA), un circuit de polarisation configurable pour SQUIDs, un buffer et un thermomètre. Par conséquent, mes travaux de thèse sont composés de deux parties: la partie numérique et la partie analogique.Mes contributions aux circuits numériques du WFEE sont présentées dans « Part III » de ma thèse. Elles comprennent la conception d'une nouvelle librairie des portes logiques numériques durcies aux radiations et la création d'un nouveau décodeur I2C avec ses schémas et layouts optimisés, en utilisant ma nouvelle librairie numérique. Les résultats représentatifs des essais de radiation sur les composants et les registres à 8-bit avec une telle conception durcie aux radiations sont également discutés dans « Part III » de ma thèse. Tous les circuits numériques dans les deux nouveaux ASICs «AwaXe_v2» et «AwaXe_v2.5» sont constitués de cette nouvelle librairie numérique durcie aux radiations, ainsi que ceux dans les futurs ASICs. Les décodeurs I2C optimisés ont prouvé un bon fonctionnement, testés avec les autres circuits intégrés dans «AwaXe_v2» et «AwaXe_v2.5».Mes contributions sur les circuits analogiques du WFEE sont présentées dans « Part IV ». Elles comprennent la conception d'un LNA, d'un buffer, d'une référence de courant et d'un convertisseur numérique-analogique (DAC). Le LNA est essentiel pour atteindre la résolution spectrale élevée sans précédent de 2,5 eV proposée par l'instrument X-IFU. Il a une conception originale, intégrée dans les ASICs v2 et v2.5. Il a été entièrement testée et a donné des résultats satisfaisants et cohérents. Ses performances ont été prouvées expérimentalement pour répondre à toutes les spécifications requises par le CNES. Fonctionnant dans la bande de fréquence de 1-5 MHz, il fournit un gain de tension super-linéaire de 85 V/V, une large bande passante de -1 dB à 17,5 MHz et une faible dérive de gain &lt;350 ppm/K. Il réalise un très faible bruit à tension ≈ 0,8 nV/√Hz à l’entrée, ainsi qu’une faible fréquence de coupure de bruit 1/f &lt;4 kHz, un bon PSRR et un bon CMRR. Le buffer utilise une conception similaire à celle du LNA et a besoin plus d’études dans les travaux futurs. La référence de courant a été entièrement testée avec une sortie de 1 mA. Grâce à sa conception originale, qui compense les références CTAT et PTAT, elle est capable de fournir un courant super stable, indépendant de la température, parfaite pour la polarisation de SQUID. Enfin, j'ai également développé un DAC à 8-bit pour la polarisation de SQUID. 8 DACs, une référence de courant et un bus série composent un circuit complet de la polarisation de SQUID d’un canal WFEE. Ce circuit a été intégré dans l’ASIC «AwaXe_v2.5» et a donné un bon résultat lors de la première mesure.En conclusion, ma thèse a produit deux ASICs pour le WFEE: «AwaXe_v2» et «AwaXe_v2.5». Les deux ASICs montrent de bonnes performances. En particulier, le dernier ASIC intègre tous les composants d'un canal WFEE, ce qui peut être considéré comme un prototype. Ainsi, il est un bon représentant de mes travaux de la thèse. En outre, les performances élevées du LNA et de la référence de courant aussi montrent le potentiel pour s’adapter à d’autres missions scientifiques similaires<br>The subject of my thesis is the development of radiation-hardened mixed-signal Application-Specific Integrated Circuits (ASICs) for space observatories. The thesis takes place in the context of a future X-ray space observatory of the European Space Agency, named Advanced Telescope for High ENergy Astrophysics (ATHENA). The ASICs developed belong to one of the two scientific instruments of the observatory, called X-ray Integral Field Unit (X-IFU) and are dedicated to one of the subsystems of the X-IFU instrument, the WFEE (Warm Front End Electronics).The WFEE is a mixed electronic system, mainly including a Low Noise Amplifier (LNA), a configurable SQUID bias, a buffer and a thermometer. Consequently, my thesis work is composed of two parts: the digital part and the analogue part.My contributions to the digital microelectronics of the WFEE are presented in Part III of my thesis. It includes the design of a new radiation-hardened digital library and the creation of a new I2C decoder with optimised schematic and layout, made of my new digital library. The representative radiation assessment results concerning the components and 8-bit registers with such radiation-hardened design are also discussed in Part III of the thesis. All the digital circuits of the two new ASICs “AwaXe_v2” and “AwaXe_v2.5” are made of this new radiation-hardened digital library, as well as those in the future ASICs. The optimised I2C decoders have been proved a good functioning along with the other circuits, integrated into the “AwaXe_v2” and “AwaXe_v2.5”.My contributions on the analogue circuits of the WFEE are presented in Part IV. It includes the design of an LNA, a buffer, a current reference and a Digital-to-Analog Converter (DAC). The LNA is critical for fulfilling the unprecedented high spectral resolution of 2.5 eV proposed by the X-IFU instrument. Its original design has been integrated into the ASICs v2 and v2.5, both fully tested and showing satisfying and coherent results. Its performance has been experimentally proved to fulfil all the specifications required by the CNES. Operating within the frequency band of 1-5 MHz, it provides a super-linear voltage gain of 85 V/V, with a large bandwidth of −1 dB up to 17.5 MHz and a low gain drift &lt; 350 ppm/K. It realises an ultra-low voltage noise ≈ 0.8 nV/√Hz at the input, as well as a low 1/f noise corner frequency &lt; 4 kHz, a good PSRR and CMRR. The buffer uses a similar design as the LNA and needs to be further studied in future work. The current reference has been fully tested with an output of 1 mA. Thanks to its original design compensating a CTAT and a PTAT reference, it has been proved to be capable of providing a super-stable temperature independent current, perfect for the SQUID bias. At last, I have also developed an 8-bit DAC for the SQUID bias. 8 DACs along with a current reference and a series bus compose a complete SQUID bias of one WFEE channel. This circuit has been integrated into the ASIC “AwaXe_v2.5” and showed a good result for the first measurement.In conclusion, my thesis has yielded two ASICs for the WFEE: “AwaXe_v2” and “AwaXe_v2.5”. Both ASICs show good performance. In particular, the last ASIC integrates all the components of one WFEE channel, which can be considered as a prototype. Thus, it is a good representative of my work. Moreover, the high performance of the LNA and the current reference also give them the potential to adapt with other similar scientific missions
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Clark, Terri Roxanne Dular. "Oligomeric germanium phthalocyanine Langmuir-Blodgett films for microelectronics and molecular electronics." Case Western Reserve University School of Graduate Studies / OhioLINK, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=case1061836473.

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8

Vahesan, Srirajasingam. "Design and fabrication of an optical fiber interrogation instrumentation system." Thesis, University of Ottawa (Canada), 2007. http://hdl.handle.net/10393/27558.

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The design and fabrication of an optical Fiber Interrogation Instrumentation System is studied in this thesis. The objective is to design a Fiber Bragg Grating Interrogation (FBGI) instrumentation system using a Fiber Fabry Perot Tunable Filter (FFP-TF). An FBGI instrumentation system is designed to monitor the back-reflected wavelength shifts from a Distributed Fiber Bragg Grating (DFBG) network and to interpret those wavelength shifts into environmental temperature, strain and pressure variations. This thesis encapsulates the complete system development lifecycle, inclusive of an applied case study of an FBGI Instrumentation system for monitoring the movements of bedsore patients. Specifically, in this thesis, an overview of Fiber Bragg Grating based fiber-optic sensors and their applications are presented, a novel design and implementation of an FBG interrogation system is described, which includes a detailed study on embedding techniques of FBGs in carbon composite, and an analysis of the test results from different embedding configurations is included. The discussion combines the novel approaches taken to resolve multiple peaks and peak-splitting phenomena observed in the reflected spectrum. A novel approach to remove the undesired temperature effect during strain sensing has been illustrated using neutral layer embedding of temperature FBG sensors. This thesis proposes the system architectures for the designs of a single-board microprocessor and a DAQ card based interrogation system using FFP-TF scanning technology. A 16-bit microprocessor ADSP-2181 from Analog Devices and a Data Acquisition Card DAQ-6015 from National Instruments is used as the front-end signal-processing circuit. The electronics circuit is built on a 4-layer printed circuit board. By incorporating an optical switch in the design and implementing a multiplexing technique, more FBGs are detected. This novel approach is successful due to the quasi-static nature of the measured environmental changes. This thesis demonstrates a detailed analysis and experiments on the optical path of the design. These involve design and verification of a 980-nm laser pump circuit, design and experiments of an ASE source and an EDFA design where it is shown that EDFA design is necessary to provide the required amplification to the reflected signal spectrum. In addition, EDFA gain flattening, FFP-TF characteristics verification, optical-receiver design and the like are described. It is demonstrated that co-directional pumping is better than counter-directional pumping. In addition, the dependency of EDFA gain on the wavelength, the input power of the signal and the length of the erbium doped fiber is discussed. Novel approaches such as linear segmentation and look-up table implementation are proposed to compensate for the non-linear characteristics of the FFP-TF filter. An innovative coarse and fine sampling technique is implemented to improve the sampling speed while keeping the tuning speed of FFP-TF low in the range of 100--300 Hz to achieve better resolution of the FFP-TF output. Finally recommendations are suggested for future work. In general the performance can be improved by running the signal processing algorithms on an on-board high-speed processor.
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9

Pascarella, Nathan William. "Advanced encapsulation processing for low cost electronics assembly." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/19031.

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Tijiwa, Birk Felipe. "Spin electronics in metallic nanoparticles." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/39525.

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The work presented in this thesis shows how tunneling spectroscopy techniques can be applied to metallic nanoparticles to obtain useful information about fundamental physical processes in nanoscopic length scales. At low temperatures, the discrete character of the energy spectrum of these particles, allows the study of spin-polarized current via resolved "electron-in-a-box" energy levels. In samples consisting of two ferromagnetic electrodes tunnel coupled to single aluminum nanoparticles, spin accumulation mechanisms are responsible for the observed spin-polarized current. The observed effect of an applied perpendicular magnetic field, relative to the magnetization orientation of the electrodes, indicates the suppression of spin precession in such small particles. More generally, in the presence of an external non-collinear magnetic field, it is the local field "felt" by the particle that determines the character of the tunnel current. This effect is also observed in the case where only one of the electrodes is ferromagnetic. In contrast to the non-magnetic case, ferromagnetic nanoparticles exhibit a much more complex energy spectrum, which cannot be accounted for, using the simple free-electron picture. It will be shown that interactions between quasi-particle excitations due to sequential electron tunneling and spin excitations in the particle are likely to play an important role in the observed temperature/voltage dependence of magnetic hysteresis loops.
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