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Rozprawy doktorskie na temat „OSCILLATOR CIRCUIT”

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Data publikacji: 11 września 2023
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1

Biswas, Shampa. "Integrated CMOS Doppler Radar : System Specification & Oscillator Design." Thesis, Linköpings universitet, Elektroniska Kretsar och System, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-129222.

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This thesis report presents system specification, such as frequency and output power level, and selection topology of an oscillator circuit suitable for a CMOS Integrated Doppler radar application, in order to facilitate short range target detection within 5-15 m range, using a 0.35 μm CMOS process. With this selected CMOS process, the frequency band at 2.45 GHz or 5 GHz, with a maximum output power level of 25 mW (e.i.r.p), is found to be appropriate for the whole system to obtain a good performance. In this thesis work, a Ring VCO with pseudo-differential architecture has been designed and o
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2

Bosley, Ryan Travis. "A VHF/UHF Voltage Controlled Oscillator in 0.5um BiCMOS." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/31452.

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The dramatic increase in market demand for wireless products has inspired a trend for new designs. These designs are smaller, less expensive, and consume less power. A natural result of this trend has been the push for components that are more highly integrated and take up less real estate on the printed circuit board (PCB). Major efforts are underway to reduce the number of integrated circuits (ICs) in newer designs by incorporating several functions into a single chip. Availability of newer technologies such as silicon bipolar with complementary metal oxide semiconductor (BiCMOS) has h
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3

Yu, Chuanzhao. "STUDY OF NANOSCALE CMOS DEVICE AND CIRCUIT RELIABILITY." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3551.

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The development of semiconductor technology has led to the significant scaling of the transistor dimensions -The transistor gate length drops down to tens of nanometers and the gate oxide thickness to 1 nm. In the future several years, the deep submicron devices will dominate the semiconductor industry for the high transistor density and the corresponding performance enhancement. For these devices, the reliability issues are the first concern for the commercialization. The major reliability issues caused by voltage and/or temperature stress are gate oxide breakdown (BD), hot carrier effects (H
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4

Chen, Tingsu. "CMOS High Frequency Circuits for Spin Torque Oscillator Technology." Licentiate thesis, KTH, Integrerade komponenter och kretsar, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-139588.

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Spin torque oscillator (STO) technology has a unique blend of features, including but not limited to octave tunability, GHz operating frequency, and nanoscaled size, which makes it highly suitable for microwave and radar applications. This thesis studies the fundamentals of STOs, utilizes the state-of-art STO's advantages, and proposes two STO-based microwave systems targeting its microwave applications and measurement setup, respectively. First, based on an investigation of possible STO applications, the magnetic tunnel junction (MTJ) STO shows a great suitability for microwave oscillator in
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5

Van, der Merwe John. "An experimental investigation into the validity of Leeson's equation for low phase noise oscillator design." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5424.

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Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2010.<br>Thesis presented in partial fulfilment of the requirements for the degree Master of Science in Engineering at the University of Stellenbosch<br>ENGLISH ABSTRACT: In 1966, D.B. Leeson presented his model on phase noise in a letter entitled A Simple Model of Feedback Oscillator Noise Spectrum. This model usually requires an additional e ffective noise figure in order to conform with measured results. (This e ffective noise fi gure has to be determined by means of curve-fi tting Leeson's model wit
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6

Wang, Shen. "Design and Analysis of a Low-Power Low-Voltage Quadrature LO Generation Circuit for Wireless Applications." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/39301.

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The competitive market of wireless communication devices demands low power and low cost RF solutions. A quadrature local oscillator (LO) is an essential building block for most transceivers. As the CMOS technology scales deeper into the nanometer regime, design of a low-power low-voltage quadrature LO still poses a challenge for RF designers. This dissertation investigates a new quadrature LO topology featuring a transformer-based voltage controlled oscillator (VCO) stacked with a divide-by-two for low-power low-voltage wireless applications. The transformer-based VCO core adopts the Armstrong
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7

Arndt, Grégory. "System architecture and circuit design for micro and nanoresonators-based mass sensing arrays." Thesis, Paris 11, 2011. http://www.theses.fr/2011PA112358/document.

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Le sujet de thèse porte sur des micro/nanorésonateurs ainsi que leurs électroniques de lecture. Les composants mécaniques sont utilisés pour mesurer des masses inférieures à l'attogramme (10-18 g) ou de très faibles concentrations de gaz. Ces composants peuvent ensuite être mis en réseau afin de réaliser des spectromètres de masse ou des détecteurs de gaz. Afin d'atteindre les résolutions nécessaires, il a été choisi d'utiliser une détection harmonique de résonance détectant les variations de la fréquence de résonance d'une nanostructure mécanique. Les dimensions du résonateur sont réduites af
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8

Fitzpatrick, Justin Jennings. "Analysis and Design of Low-Jitter Oscillators." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd369.pdf.

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9

Kellum, Reginald 1963. "Analysis and design of a regenerative differential voltage-controlled oscillator for high frequency integrated circuit applications." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/278040.

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An investigation into the feasibility of designing a monolithic high frequency voltage controlled oscillator is performed. With design constraints of an oscillator Q between 5 and 10 and minimal chip area, the resonant LC tank and negative resistive cross coupled differential amplifier circuit is analyzed and design guidelines are developed. Analysis of the circuit encompasses both linear and non-linear modes of operation of the circuit, predicts the fundamental frequency of oscillation, and highlights design limitations for the resonant elements in terms of meeting the Q specifications at hig
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10

Bunch, Ryan Lee. "A Fully Monolithic 2.5 GHz LC Voltage Controlled Oscillator in 0.35 um CMOS Technology." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/32287.

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The explosive growth in wireless communications has led to an increased demand for wireless products that are cheaper, smaller, and lower power. Recently there has been an increased interest in using CMOS, a traditional digital and low frequency analog IC technology, to implement RF components such as mixers, voltage controlled oscillators (VCOs), and low noise amplifiers (LNAs). Future mass-market RF links, such as BlueTooth, will require the potentially low-cost single-chip solutions that CMOS can provide. In order for such single-chip solutions to be realized, RF circuits must be design
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11

Narayanaswamy, Anand Subramanian. "A Non-Contact Sensor Interface for High-Temperature, MEMS Capacitive Sensors." Case Western Reserve University School of Graduate Studies / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1275675071.

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12

Yu, Yixin. "Negative bias temperature instability and charge trapping effects on analog and digital circuit reliability." Master's thesis, University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4056.

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Nanoscale p-channel transistors under negative gate bias at an elevated temperature show threshold voltage degradation after a short period of stress time. In addition, nanoscale (45 nm) n-channel transistors using high-k (HfO2) dielectrics to reduce gate leakage power for advanced microprocessors exhibit fast transient charge trapping effect leading to threshold voltage instability and mobility reduction. A simulation methodology to quantify the circuit level degradation subjected to negative bias temperature instability (NBTI) and fast transient charge trapping effect has been developed in t
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13

Scardelletti, Maximilian C. "DEVELOPMENT OF A HIGH TEMPERATURE SILICON CARBIDE CAPACITIVE PRESSURE SENSOR SYSTEM BASED ON A CLAPP-TYPE OSCILLATOR CIRCUIT." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1467112012.

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14

Muhr, Eloi. "Conception de générateurs d'impulsions et des circuits de mise en forme reconfigurables associés." Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4346.

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Depuis 2002, différentes bandes de fréquences de plusieurs GHz dites « Ultra-Large Bande » (ULB), généralement comprises entre 3,1GHz et 10,6GHz, ont été libérées de par le monde pour la transmission d’informations sans fil. La largeur de ces bandes est telle qu’il devient envisageable d’utiliser des impulsions comme support de l’information en lieu et place d’une porteuse modulée comme cela est le cas habituellement. En effet, le spectre d’une impulsion étant inversement proportionnel à sa durée, une large plage de fréquences est requise pour la transmission d’informations via des impulsions.
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15

Carroll, Matthew J. "First Order Self-Oscillating Class-D Circuit with Triangular Wave Injection." DigitalCommons@CalPoly, 2021. https://digitalcommons.calpoly.edu/theses/2303.

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An investigation into performance improvements to the modulator stage of a class-D amplifier is conducted in this thesis. Two of the standard topologies, namely class-D open-loop pulse-width modulation (PWM), and the improved self-oscillating feedback system are benchmarked against a topology which includes both a hysteretic comparator in a feedback loop and triangle wave injection. Circuit performance is analyzed by comparing how the triangle injection circuit handles known issues with open-loop and self-oscillating circuits. Using this analysis, it is shown that the triangle injection topolo
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16

Bořecký, Tomáš. "ARC oscilátor s bloky s řiditelným parametrem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217807.

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Within the master’s thesis there is comparison of different structures of ARC oscillators with respect to their harmonic distortion. Individual blocks of oscillator are analyzed. Attention is paid to choosing and design of suitable ARC filter structure and possibilities of its tuning. Also possibilities of stabilization of amplitude are analyzed. Different types of controlled amplifiers and circuits for controlling of their amplification are discussed. Next captures are focused to designing and simulation of the ARC oscillator. The oscillator can be tuned in the frequency range from 100 Hz to
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17

Gomez, gomez Ricardo. "Design of innovative solutions to improve the variability and reliability of CMOS circuits on thin film technologies." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALT023.

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La sensibilité accrue aux variations des procedés de fabrication, de tension, de température et de vieillissement (PVTA) dans les nœuds technologiques avancés d'integration est responsable d'une dégradation significative des spécifications des circuits integrés lors de la fabrication à grand volume. Celle-ci est devenue une préoccupation croissante dans la conception de circuits numériques, qui doit faire face aux exigences de plus en plus strictes des applications modernes en termes d'efficacité énergétique, de fiabilité et de sécurité. Dans ce travail de thèse, les techniques de surveillance
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18

Muhr, Eloi. "Conception de générateurs d'impulsions et des circuits de mise en forme reconfigurables associés." Electronic Thesis or Diss., Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4346.

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Depuis 2002, différentes bandes de fréquences de plusieurs GHz dites « Ultra-Large Bande » (ULB), généralement comprises entre 3,1GHz et 10,6GHz, ont été libérées de par le monde pour la transmission d’informations sans fil. La largeur de ces bandes est telle qu’il devient envisageable d’utiliser des impulsions comme support de l’information en lieu et place d’une porteuse modulée comme cela est le cas habituellement. En effet, le spectre d’une impulsion étant inversement proportionnel à sa durée, une large plage de fréquences est requise pour la transmission d’informations via des impulsions.
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19

Ameziane, El Hassani Chama. "Contribution à la réalisation d’un oscillateur push-push 80GHz synchronisé par un signal subharmonique pour des applications radars anticollisions." Thesis, Bordeaux 1, 2010. http://www.theses.fr/2010BOR14025/document.

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Ce travail de thèse s’inscrit dans le cadre d’un projet Français « VéLo » qui est une collaboration entre l’industriel STMicroelectronics et plusieurs laboratoires dont les laboratoires IMS-bordeaux et LAAS. Le but du projet est de concevoir un prototype de radar anticollision millimétrique. Dans ce travail un synthétiseur de fréquence est implémenté. Ce dernier sera intégré dans la chaine de réception du démonstrateur. Une étude bibliographique des architectures classiques de système de radiocommunication a été réalisée. Des exemples d’architectures rencontrées dans le domaine millimétrique o
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20

Laporte, Christophe. "Conception en technologie intégrée de circuits hyperfréquences pour la télémesure image d'un instrument spatial." Phd thesis, Université Paul Sabatier - Toulouse III, 1995. http://tel.archives-ouvertes.fr/tel-00144088.

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L'objectif de cette étude est la réalisation en technologie monolithique intégrée de circuits hyperfréquences pour la télémesure d'un instrument spatial. L'étude a plus particulièrement porté sur la conception d'oscillateurs à fréquences fixes et d'oscillateurs contrôlés en tension entièrement intégrés dans la bande de fréquence 8-8,4 GHz. Une nouvelle méthode de conception des oscillateurs hyperfréquences, basée sur le calcul analytique des conditions d'oscillations de l'oscillateur, est présentée. Le calcul formel est utilisé pour accéder au rôle de chacun des éléments du circuit ainsi qu'à
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21

Kodrnja, Marc. "Étude des oscillateurs controlés en tension pour les circuits à fréquence intermédiaire : analyse et simulation du bruit des oscillateurs." Grenoble INPG, 1997. http://www.theses.fr/1997INPG0212.

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Cette etude a porte sur l'analyse du bruit des oscillateurs et sur sa simulation en vue de l'appliquer sur des vco pour des circuits integres a la frequence intermediaire. Une methode de simulation originale du bruit de la fluctuation de la periode en mode transitoire, a l'aide du simulateur eldo, a ete elaboree. Il est alors possible d'en deduire le bruit de phase du vco. Ce type de simulation permet egalement d'evaluer l'effet des differentes sources de bruit dans le vco sur la variation de la periode. Deux oscillateurs controles en tension, optimises en bruit, ont ete concus pour les circui
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22

Tinguy, Pierre. "Etude et développement d’un oscillateur à quartz intégré." Thesis, Besançon, 2011. http://www.theses.fr/2011BESA2017/document.

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Le besoin croissant de réduction du volume, de la masse et de la consommation des dispositifs électroniques sans pertes deperformances concerne aussi les oscillateurs à quartz utilisés dans les applications métrologiques (bases de temps, capteurs),la téléphonie, la navigation... Dans le cadre de cette problématique, nous avons développé un ASIC (Application SpecificIntegrated Circuit) en technologie 0,35 μm SiGe BiCMOS (Austriamicrosystems®) fonctionnant sous 3,3 V (±10%) pourréaliser un oscillateur à quartz miniature opérationnel sur une gamme en fréquence allant de 10 MHz à 100 MHz. Ce circu
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23

Zheng, Yi. "Biological Agent Sensing Integrated Circuit (BASIC): A New Complementary Metal-oxide-semiconductor (CMOS) Magnetic Biosensor System." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/48892.

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Fast and accurate diagnosis is always in demand by modern medical professionals and in the area of national defense. At present, limitations of testing speed, sample conditions, and levels of precision exist under current technologies, which are usually slow and involve testing the specimen under laboratory conditions. Typically, these methods also involve several biochemical processing steps and subsequent detection of low energy luminescence or electrical changes, all of which reduce the speed of the test as well as limit the precision. In order to solve these problems and improve the sensin
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24

CARUSO, Marco. "Computationally Efficient Innovative Techniques for the Design-Oriented Simulation of Free-Running and Driven Microwave Oscillators." Doctoral thesis, Università degli Studi di Palermo, 2014. http://hdl.handle.net/10447/90792.

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Analysis techniques for injection-locked oscillators/amplifiers (ILO) can be broadly divided into two classes. To the first class belong methods with a strong and rigorous theoretical basis, that can be applied to rather general circuits/systems but which are very cumbersome and/or time-consuming to apply. To the second class belong methods which are very simple and fast to apply, but either lack of validity/accuracy or are applicable only to very simple or particular cases. In this thesis, a novel method is proposed which aims at combining the rigorousness and broad applicability characteriz
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25

Huan, Junjun. "Wafer-Level Vacuum-Encapsulated Ultra-Low Voltage Tuning Fork MEMS Resonator." University of Dayton / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1493253273171541.

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Sanderson, David Ivan. "A 5-6 Ghz Silicon-Germanium Vco With Tunable Polyphase Outputs." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/32623.

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In-phase and quadrature (I/Q) signal generation is often required in modern transceiver architectures, such as direct conversion or low-IF, either for vector modulation and demodulation, negative frequency recovery in direct conversion receivers, or image rejection. If imbalance between the I and Q channels exists, the bit-error-rate (BER) of the transceiver and/or the image rejection ratio (IRR) will quickly deteriorate. Methods for correcting I/Q imbalance are desirable and necessary to improve the performance of quadrature transceiver architectures and modulation schemes. This thesis
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27

Klein, Adam Sherman. "Design and Characterization of RFIC Voltage Controlled Oscillators in Silicon Germanium HBT and Submicron MOS Technologies." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/34435.

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Advances in wireless technology have recently led to the potential for higher data rates and greater functionality. Wireless home and business networks and 3G and 4G cellular phone systems are promising technologies striving for market acceptance, requiring low-cost, low-power, and compact solutions. One approach to meet these demands is system-on-a-chip (SoC) integration, where RF/analog and digital circuitry reside on the same chip, creating a mixed-signal environment. Concurrently, there is tremendous incentive to utilize Si-based technologies to leverage existing fabrication and design in
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28

Vencálek, Roman. "Univerzální aktivní prvky a jejich využití v kmitočtových filtrech." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-218092.

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This master’s thesis deals with the advanced universal modern active elements, such as the current and voltage conveyors. The problem with small bandwidth has been fixed due to the quick development in recent years. Current and voltage conveyors are still being researched. The good properties of conveyors promise their possible commercial usage in the future. For the research of current conveyors we can use parts of other integrated circuits and thus get elements with similar properties. This thesis suggests how to make an active filter using the DBTA and FDBTA elements which were created by “
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29

Enchelmaier, David Samuel. "A miniaturised wideband frequency synthesiser." Thesis, Queensland University of Technology, 2009. https://eprints.qut.edu.au/31851/1/David_Enchelmaier_Thesis.pdf.

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Wideband frequency synthesisers have application in many areas, including test instrumentation and defence electronics. Miniaturisation of these devices provides many advantages to system designers, particularly in applications where extra space and weight are expensive. The purpose of this project was to miniaturise a wideband frequency synthesiser and package it for operation in several different environmental conditions while satisfying demanding technical specifications. The four primary and secondary goals to be achieved were: 1. an operating frequency range from low MHz to greater
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30

Weisz, Mario. "Electrothermal device-to-circuit interactions for half THz SiGe∶C HBT technologies." Thesis, Bordeaux 1, 2013. http://www.theses.fr/2013BOR14909/document.

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Ce travail concerne les transistors bipolaires à hétérogène TBH SiGe. En particulier, l'auto-échauffement des transistors unitaires et le couplage thermique avec leurs plus proches voisins périphériques sont caractérisés et modélisés. La rétroaction électrothermique intra- et inter-transistor est largement étudiée. En outre, l’impact des effets thermiques sur la performance de deux circuits analogiques est évalué. L'effet d'autoéchauffement est évalué par des mesures à basse fréquence et des mesures impulsionnelles DC et AC. L'auto-échauffement est diminué de manière significative en utilisant
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31

Veillette, Benoît R. "A study of delta-sigma oscillator circuits." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22837.

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The generation of spectrally pure analog sinewave with predictable characteristics is an important issue of mixed-signal testing. Digital frequency synthesizers exhibit many good features but current implementations are area expensive. This dissertation will study a novel digital frequency synthesizer approach based on digital resonators and delta-sigma modulation. Except for a 1-bit digital-to-analog converter, the analog signal generator implementation is entirely digital allowing precise control over the amplitude and frequency of oscillation. It may therefore be tested using digital method
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32

Gray, Peter. "Phase-locked cellular oscillators." Thesis, University of Aberdeen, 1996. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU089854.

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Biological oscillators occur frequently in nature---and many systems, such as the growth of certain bacteria, are governed by the 24-hour circadian clock. Furthermore biological phase-locked oscillators, as identified by researchers, are clearly an integral part of the structure of the brain in humans, and in animals in general. Such systems are most conveniently investigated via computer models. This thesis describes the computer-modelling of phase-locked systems in which the oscillator is a cellular automaton---a device often used by scientists to model the growth or decay of populations wit
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33

Sharapov, V. M., and K. V. Bazilo. "Piezoelectric transformer with parallel oscillatiry circuit." Thesis, Sumy State University, 2014. http://essuir.sumdu.edu.ua/handle/123456789/39938.

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Piezoelectric transducers are widely used in electroacoustics, hydroacoustics, in ultrasound, medical, measurement technique, in scanning probe nanomicroscopes, piezoengines and in other fields of science and technology. To create transducers with necessary characteristics the technology of additional elements can be used.
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34

Sehmbi, Jatinder Singh. "The dynamics of friction oscillators." Thesis, University College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248042.

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35

Lang, Radek. "Vysokofrekvenční oscilátor v technologii CMOS." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221110.

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This project focus to desing an on-chip oscillator in function as a clock generator. Frequency stability of the oscillator is affected by supply voltage, temperature and process variations. The aim is to propose a clock generator with sufficient frequency stability, low power consumption and a small chip area. This work deals with the types of oscillators and their basic building blocks suitable for our application. It also deals with the study and design options of temperature and process compensation circuit generating the current control, which provides the frequency stabilization of the ou
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36

Tasselli, Josiane. "Etude et realisation de structures bipolaires particulieres a heterojonction gaas-gaaias : application aux circuits integres de type ecl." Toulouse 3, 1986. http://www.theses.fr/1986TOU30019.

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Ce memoire presente l'etude et la realisation d'un circuit integre bipolaire de type ecl sur arseniure de gallium. Une etude theorique de transistors bipolaires a double heterojonction a montre l'influence determinante de la jonction collecteur-base, notamment de sa gradualite, sur leur comportement electrique. Ces resultats ont pu etre confirmes par une analyse experimentale a partir de structures realisees par epitaxie en phase liquide. La simulation et l'optimisation d'un oscillateur en anneau a base de simples heterotransistors et mettant en oeuvre le logiciel astec iii, ont permis de calc
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37

Opperman, Tjaart Adriaan Kruger. "A 5 GHz BiCMOS I/Q VCO with 360° variable phase outputs using the vector sum method." Diss., Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-04082009-171225/.

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Thesis (M.Eng.(Microelectronic Engineering))--University of Pretoria, 2009.<br>Includes summaries in Afrikaans and English. Includes bibliographical references (leaves [74]-78). Mode of access: World Wide Web.
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Wilson, Martin Paul. "Synthesised local oscillator design considerations for satellite data communications systems." Thesis, University of York, 1992. http://etheses.whiterose.ac.uk/2489/.

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Laha, Soumyasanta. "Analysis & Design of Radio Frequency Wireless Communication Integrated Circuits with Nanoscale Double Gate MOSFETs." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1418730974.

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Pache, Denis. "Étude de nouvelles architectures pour l'intégration de fonctions radio fréquence en technologie BiCMOS." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0079.

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Ce travail est consacre a l'integration des fonctions radio frequence (rf) de la partie reception d'un terminal mobile 2ghz en technologie silicium bicmos. Dans une premiere partie, les differentes caracteristiques des systemes rf sont rappelees. Ces systemes sont particulierement complexes (architecture, fiabilite) et les problemes lies a leur integration sont mis en evidence. Dans la partie suivante les principes de base et les proprietes des modulations analogiques et numeriques sont donnes. Dans une troisieme partie les composants silicium sont analyses. En particulier, une comparaison ent
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Madureira, Heider Marconi Guedes. "Study and design of CMOS RF power circuits and modulation capabilities for communication applications." Thesis, reponame:Repositório Institucional da UnB, 2015. http://www.theses.fr/2015BORD0093/document.

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Dans l’ère des systèmes de communication multi-standards, le besoin des circuits en radio fréquence (RF) flexibles et reconfigurables pousse l´industrie et le monde académique vers la recherche d´architectures alternatives d’émetteurs et de récepteurs RF. Dans cette thèse, nous nous intéressons aux émetteurs RF flexibles. Nous présentons une architecture basée sur l’utilisation d’un oscillateur de puissance composé d´un amplificateur de puissance dans une boucle de rétroaction positive. Pour des raisons de compatibilité avec des circuit numériques et dans le but de minimiser les coûts de fabri
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Foale, Stephen. "Bifurcations in impact oscillators : theoretical and experimental studies." Thesis, University College London (University of London), 1993. http://discovery.ucl.ac.uk/1381753/.

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One of the most important features of nonlinear dynamicai systems is that, as system parameters are varied, qualitative changes in the overall behaviour of the system can occur at a bifurcation . For smooth systems, the local bifurcations which occur under the change of one parameter are well understood. Non-smooth dynamical systems, which frequently arise due to the way certain physical processes are modelled, undergo bifurcations which have not been widely studied. We examine a particular type of bifurcation arising in a commonly occurring class of non-smooth dynamical system, combining theo
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Lauterbach, Adam Peter. "Low-cost SiGe circuits for frequency synthesis in millimeter-wave devices." Australia : Macquarie University, 2010. http://hdl.handle.net/1959.14/76626.

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"2009"<br>Thesis (MSc (Hons))--Macquarie University, Faculty of Science, Dept. of Physics and Engineering, 2010.<br>Bibliography: p. 163-166.<br>Introduction -- Design theory and process technology -- 15GHz oscillator implementations -- 24GHz oscillator implementation -- Frequency prescaler implementation -- MMIC fabrication and measurement -- Conclusion.<br>Advances in Silicon Germanium (SiGe) Bipolar Complementary Metal Oxide Semiconductor (BiCMOS) technology has caused a recent revolution in low-cost Monolithic Microwave Integrated Circuit (MMIC) design. -- This thesis presents the design,
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Conti, Riccardo. "Studio e realizzazione di un "timing circuit" e "output circuit" per pacemaker." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9264/.

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Nell'elaborato è stato svolto uno studio su più livelli degli elementi essenziali del pacemaker asincrono secondo la realizzazione circuitale proposta da Wilson Greatbatch nel 1960. Un primo livello ha riguardato l’analisi teorica del circuito. Un secondo livello ha riguardato un’analisi svolta con LTSPICE. Con questo stesso programma, si è analizzato il segnale di temporizzazione e la forma d’onda sul carico al variare del valore di alcuni componenti chiave del circuito. Infine, si è proceduto alla sua realizzazione su breadboard.
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Li, Jih-Shui, and 李日舜. "11.492GHz Local Oscillator Circuit Design." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/65800913454844139310.

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碩士<br>逢甲大學<br>電子工程所<br>93<br>Abstract In this thesis we design a 11.492GHz local oscillator circuit. This text was described a circuit which includes several important parts TCXO IC, RF synthesizer IC, Frequency control IC, loop filter, VCO(voltage control oscillator) IC, feedback loop, multiple, micro-strip band-pass filter, amplifier, and micro-strip low-pass filter. The local oscillator is a very important component in the RF/microwave system. It serves as the signal generator in a transmitter and in a receiver, and the local oscillator is used together with a mixer to convert the received
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AN, CHUU FU, and 褚福安. "Steady-state Nonlinear Circuit and Oscillator Circuit Analysis Using Chebyshev series." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/51157577152677376983.

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碩士<br>國立臺灣科技大學<br>工程技術研究所<br>83<br>PSPICE是廣被運用於電子電路模擬設計的主要工具之一,對於振盪器電路 之高Q值線路,使用暫態分析時,經常會碰到準確性與收斂性的問題使得結 果並不正確,並且暫態分析可能因電路中各節點之時間常數之大小,可能相 差太遠,而使得到達穩態之時間很大,因此使用PSPICE並不方便,所以需要 一種穩態分析方法。本文提出一種時域方法,來計算非線性電路與振盪器 電路的穩態響應。此方法以電路中元件或埠的電壓或電流為電路狀態變 數,並以柴比雪夫級數(Chebyshev Series)來代表。根據網路方程式可建 立目標函數,再代入最佳化程式中,以求得柴比雪夫級數的係數,進而求得 各分支的電壓與電流。文中舉出四個例子,分別利用本文之方法及PSPICE 做分析,發現兩者結果相近,根據目標函數值,可驗証本文之方法。本文不 僅提出了一種穩態分析電路的方法,並實做出一微波振盪器,隨後對實做結 果做一討論。歷年來有許多非線
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Yao, Chi-Ping, and 姚啟平. "The Circuit Design of Dual-Band Voltage-Controlled Oscillator." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/54154547643571076574.

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碩士<br>國立清華大學<br>電子工程研究所<br>90<br>When the device technology improves, the power supply vdd become lower,the voltage used to bias the varactor reduced consequently. As a result, the tuning range of vco reduces.This thesis use CMOS technology to simulate specification of GSM900 and DCS1800 which dual-band voltage-controlled oscillator,and can be used in RF transceiver.So,it introduce mulity channel and wide channel form the design of circuit.Beside, using switch resonator to meet the requirement of dual-band range and using the varactor to tune frequency slightly.
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Chang, Chun Yi, and 張淳毅. "10~30GHz Voltage Control Oscillator Circuit Design and Implementation." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/86914430990435582586.

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碩士<br>長庚大學<br>電子工程學研究所<br>96<br>This thesis presents the development of a 10~30GHz UWB voltage-controlled oscillator with standard CMOS technology. There are two groups of voltage-controlled oscillators (VCO) to be implemented. One is tuning range of around 7.5GHz to 10GHz and another is around 10GHz to 15GHz. Via the operation mechanism, we can switch on the special voltage-controlled oscillator. Then, it provides the frequency bandwidth of 20GHz. Furthermore, ADS (Advanced Design System) software is also used to design the whole circuit with the RF circuit simulation. The contents are divide
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Bai, Hong-bin, and 白宏彬. "A Design of Optical-Current-Controlled Oscillator Integrated Circuit." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/25311381628234849161.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>95<br>In this thesis, a study of optical-current-controlled oscillator is presented. The CMOS process provided by CIC (Chip Implement Center) is used. Here, we study three ICs: the transimpedance amplifier and the ring-type voltage-controlled oscillator and LC-type voltage-controlled oscillator. The first part deals with three types of transimpedance amplifiers. That are linear type, and RGC type, RGC linear type. The amplifiers we designed have 81.9dBΩ,49dBΩ and 74.7dBΩ gains, respectively. Their bandwidths are 257MHz,2.73GHz and 522MHz, respectively. In the second
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Chen, Nai-Ching, and 陳乃慶. "TE01 Gyrotron Backward-Wave Oscillator with Mode Selective Circuit." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/70691579161214911386.

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