Relevant bibliographies by topics / Amplificateur à gain variable

Academic literature on the topic 'Amplificateur à gain variable'

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Published: 7 July 2024

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Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Journal articles on the topic "Amplificateur à gain variable":

1

Ginovart, F., and J. C. Simon. "Effets de longueur d'un amplificateur optique à semiconducteur sur la dynamique de gain." Journal de Physique IV (Proceedings) 12, no. 5 (June 2002): 189–91. http://dx.doi.org/10.1051/jp4:20020128.

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2

Choi, Inyoung, Heesong Seo, and Bumman Kim. "Accurate dB-Linear Variable Gain Amplifier With Gain Error Compensation." IEEE Journal of Solid-State Circuits 48, no. 2 (February 2013): 456–64. http://dx.doi.org/10.1109/jssc.2012.2227606.

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3

DUONG, Q. H., C. W. KIM, and S. G. LEE. "All CMOS Low-Power Wide-Gain Range Variable Gain Amplifiers." IEICE Transactions on Electronics E91-C, no. 5 (May 1, 2008): 788–97. http://dx.doi.org/10.1093/ietele/e91-c.5.788.

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4

CHA, S. "A CMOS IF Variable Gain Amplifier with Exponential Gain Control." IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E88-A, no. 2 (February 1, 2005): 410–15. http://dx.doi.org/10.1093/ietfec/e88-a.2.410.

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5

OHTSU, Kohei, Kristoffer KVAM, Thor I. FOSSEN, and Hitoi FUKUDA. "Optimal Steering Using Variable Gain Controller." Journal of Japan Institute of Navigation 104 (2001): 89–94. http://dx.doi.org/10.9749/jin.104.89.

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6

Zhang, Jing Zhi. "A 520MHz Wideband Variable Gain Amplifier." Applied Mechanics and Materials 556-562 (May 2014): 1564–67. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.1564.

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The design and realization of a wideband variable gain amplifier for RF system is presented. The cascade of LNA and controllable attenuation makes the design have a 0-90dB gain adjustment range. Special care is devoted to the solution of typical problems encountered in the design of the amplifier, such as signal shielding and power supply decoupling. The amplifier uses passive amplitude-frequency equalization, 0.1-460MHz band variation is less than 1dB, the 3dB bandwidth is up to 520MHz. The noise characteristic is low, the total input referred noise is less than 15.5nV⁄√¯Hz.
7

Hunnekens, Bram, Sjors Kamps, and Nathan Van De Wouw. "Variable-Gain Control for Respiratory Systems." IEEE Transactions on Control Systems Technology 28, no. 1 (January 2020): 163–71. http://dx.doi.org/10.1109/tcst.2018.2871002.

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8

Liu, W., W. Liu, and S. K. Wei. "CMOS exponential-control variable gain amplifiers." IEE Proceedings - Circuits, Devices and Systems 151, no. 2 (2004): 83. http://dx.doi.org/10.1049/ip-cds:20040111.

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9

Carlosena, A., and G. S. Moschytz. "Design of variable-gain current conveyors." IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications 41, no. 1 (1994): 79–81. http://dx.doi.org/10.1109/81.260229.

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10

Balteanu, F., and M. Cloutier. "Charge-pump controlled variable gain amplifier." Electronics Letters 34, no. 9 (1998): 838. http://dx.doi.org/10.1049/el:19980644.

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Journal articles Dissertations / Theses Books

Dissertations / Theses on the topic "Amplificateur à gain variable":

1

Fechine, Sette Elmo Luiz. "Circuits intégrés millimétriques en bande Ka pour une antenne à pointage électronique pour les télécommunications avec des satellites géostationnaires ou des constellations de satellites." Electronic Thesis or Diss., Limoges, 2024. http://www.theses.fr/2024LIMO0002.

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Ce travail présente la conception de circuits actifs intégrés en vue d'une intégration dans une antenne à dépointage électronique pour les télécommunications par satellite en bande Ka. Tout d'abord, le manuscrit présente le contexte dans lequel se déroule l'étude, abordant les principaux concepts et caractéristiques de ce type d'antenne. Par la suite, deux blocs clés de la chaîne d’émission sont étudiés en détail et conçus : un amplificateur de puissance à gain variable et trois déphaseurs pilotables. Les circuits sont réalisés en utilisant deux technologies SiGe BiCMOS: BiCMOS9MW et SG13G2. Enfin, les résultats de simulation post-layout sont exposés et comparés aux spécifications du projet ainsi qu'à l'état de l'art
This work presents the design of active integrated circuits intended for integration into an electronically steered antenna for Ka-band satellite communications. Firstly, the manuscript introduces the context of the study, discussing the main concepts and characteristics of this type of antenna. Subsequently, two key blocks of the transmission chain are studied in detail and designed: a variable gain power amplifier and three controllable phase shifters. The circuits are implemented using two SiGe BiCMOS technologies: BiCMOS9MW and SG13G2. Finally, the post-layout simulation results are presented and compared to the project specifications as well as the state of the art
2

Deza, Julien. "Etude, Conception et Caractérisation de circuits pour la Conversion Analogique Numérique à très hautes performances en technologie TBH InP 0.7µm." Thesis, Cergy-Pontoise, 2013. http://www.theses.fr/2013CERG0680/document.

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Ce travail de thèse concerne les circuits ultra-rapides pour la conversion analogique numérique performante en technologie bipolaire à hétérojonctions sur substrat Indium Phosphore (TBDH/InP). L'étude s'intéresse à la fonction principale qui est l'échantillonnage blocage. Elle a été menée par simulation de l'ensemble des blocs composant cette fonction. En particulier une étude extensive des cœurs des circuits Echantillonneurs/Bloqueurs a été effectuée pour différents paramètres électriques pour aboutir à des valeurs optimales réalisant un compromis entre la bande passante la résolution et la linéarité.Des architectures de circuits Echantillonneurs/Bloqueurs (E/B) avec ou sans l'étage d'amplification à gain variable ont été conçues, optimisées, réalisées et caractérisées et des performances à l'état de l'art ont été obtenues : des circuits E/B de bande passante supérieure à 50 GHz et cadencées à 70 Gs/s ont été réalisés pour les applications de communications optiques et des circuits de bande passante supérieure à 16 GHz cadencés à (2-8) Gs/s ont été réalisés pour la transposition de fréquence
This thesis concerns the design of high speed circuits in Indium phosphide heterojunction Bipolar technology for High performance analog to digital conversion (ADC).The study focuses on the Track and Hold block (THA) which is the main function of the ADC. The study was conducted by simulating all blocks of the THA circuit. In particular, an extensive study of the THA main block was performed for various electrical parameters to achieve optimal conditions in order to obtain a good tradeoff between resolution bandwidth and linearity. THA architectures circuits with or without Voltage Gain Amplifier stage were designed, optimized and characterized. High THA performances were achieved: THA circuit with a bandwidth greater than 50 GHz at 70 Gs/s were achieved for optical communications and circuits of bandwidth more than16 GHz at (2-8 GS /s) have been realized for down conversion operation
3

Haghighitalab, Delaram. "Récepteur radio-logicielle hautement numérisé." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066443.

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Aujourd'hui, il y a une augmentation du nombre de normes étant intégré dans des appareils mobiles. Les problèmes principaux sont la durée de vie de la batterie et la taille de l'appareil. L'idée d'un Radio-Logiciel est de pousser le processus de numérisation aussi près que possible de l'antenne. Dans cette thèse, nous présentons la première mise en œuvre d'un récepteur radio-logiciel complet basé sur Sigma-Delta RF passe-bande, y compris un LNA à gain variable (VGLNA), un ADC Sigma-Delta RF sous-échantillonné, un mélangeur bas-conversion RF numérique et un filtre de décimation polyphasé multi-étage multi-taux. Le VGLNA élargit la gamme dynamique du récepteur multi-standard pour atteindre les exigences des trois normes sans fil ciblées. Aussi une architecture mixte, en utilisant à la fois Source-Coupled Logic (SCL) et des circuits CMOS, il est proposé d'optimiser la consommation des circuits RF numériques. Par ailleurs, nous proposons une architecture de filtre en peigne à plusieurs étages avec décomposition polyphase à réduire la consommation d'énergie. Le récepteur est mesuré pour trois normes différentes dans la bande de 2.4 GHz, la bande ISM. Les résultats des mesures montrent que le récepteur atteint 79 dB, 73 dB et 63 dB de plage dynamique pour les normes Bluetooth, ZigBee et WiFi respectivement. Le récepteur complet, mis en œuvre dans le procédé CMOS 130 nm, a une fréquence centrale accordable de 300 MHz et consomme 63 mW sous 1.2 V. Comparé à d'autres récepteurs, le circuit proposé consomme 30% moins d'énergie, la plage dynamique est de 21 dB supérieur, IIP3 est de 6 dB supérieur et le facteur de mérite est de 24 dB supérieur
Nowadays there is an increase in the number of standards being integrated in mobile devices. The main issues are battery life and the size of the device. The idea of a Software Defined Radio is to push the digitization process as close as possible to the antenna. Having most of the circuit in the digital domain allows it to be reconfigurable thus requiring less area and power consumption. In this thesis, we present the first implementation of a complete SDR receiver based on RF bandpass Sigma-Delta including a Variable-Gain LNA (VGLNA), an RF subsampled Sigma-Delta ADC, an RF digital down-conversion mixer and a polyphase multi-stage multi-rate decimation filter. VGLNA enlarges the dynamic range of the multi-standard receiver to achieve the requirements of the three targeted wireless standards. Also a mixed architecture, using both Source-Coupled Logic (SCL) and CMOS circuits, is proposed to optimize the power consumption of the RF digital circuits. Moreover, we propose a multi-stage comb filter architecture with polyphase decomposition to reduce the power consumption. The receiver is measured for three different standards in the 2.4 GHz ISM-band. Measurement results show that the receiver achieves 79 dB, 73 dB and 63 dB of dynamic range for the Bluetooth, ZigBee and WiFi standards respectively. The complete receiver, implemented in 130 nm CMOS process, has a 300 MHz tunable central frequency and consumes 63 mW under 1.2 V supply. Compared to other SDR receivers, the proposed circuit consumes 30% less power, the DR is 21 dB higher, IIP3 is 6 dB higher and the overall Figure of Merit is 24 dB higher
4

Haghighitalab, Delaram. "Récepteur radio-logicielle hautement numérisé." Electronic Thesis or Diss., Paris 6, 2015. http://www.theses.fr/2015PA066443.

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Aujourd'hui, il y a une augmentation du nombre de normes étant intégré dans des appareils mobiles. Les problèmes principaux sont la durée de vie de la batterie et la taille de l'appareil. L'idée d'un Radio-Logiciel est de pousser le processus de numérisation aussi près que possible de l'antenne. Dans cette thèse, nous présentons la première mise en œuvre d'un récepteur radio-logiciel complet basé sur Sigma-Delta RF passe-bande, y compris un LNA à gain variable (VGLNA), un ADC Sigma-Delta RF sous-échantillonné, un mélangeur bas-conversion RF numérique et un filtre de décimation polyphasé multi-étage multi-taux. Le VGLNA élargit la gamme dynamique du récepteur multi-standard pour atteindre les exigences des trois normes sans fil ciblées. Aussi une architecture mixte, en utilisant à la fois Source-Coupled Logic (SCL) et des circuits CMOS, il est proposé d'optimiser la consommation des circuits RF numériques. Par ailleurs, nous proposons une architecture de filtre en peigne à plusieurs étages avec décomposition polyphase à réduire la consommation d'énergie. Le récepteur est mesuré pour trois normes différentes dans la bande de 2.4 GHz, la bande ISM. Les résultats des mesures montrent que le récepteur atteint 79 dB, 73 dB et 63 dB de plage dynamique pour les normes Bluetooth, ZigBee et WiFi respectivement. Le récepteur complet, mis en œuvre dans le procédé CMOS 130 nm, a une fréquence centrale accordable de 300 MHz et consomme 63 mW sous 1.2 V. Comparé à d'autres récepteurs, le circuit proposé consomme 30% moins d'énergie, la plage dynamique est de 21 dB supérieur, IIP3 est de 6 dB supérieur et le facteur de mérite est de 24 dB supérieur
Nowadays there is an increase in the number of standards being integrated in mobile devices. The main issues are battery life and the size of the device. The idea of a Software Defined Radio is to push the digitization process as close as possible to the antenna. Having most of the circuit in the digital domain allows it to be reconfigurable thus requiring less area and power consumption. In this thesis, we present the first implementation of a complete SDR receiver based on RF bandpass Sigma-Delta including a Variable-Gain LNA (VGLNA), an RF subsampled Sigma-Delta ADC, an RF digital down-conversion mixer and a polyphase multi-stage multi-rate decimation filter. VGLNA enlarges the dynamic range of the multi-standard receiver to achieve the requirements of the three targeted wireless standards. Also a mixed architecture, using both Source-Coupled Logic (SCL) and CMOS circuits, is proposed to optimize the power consumption of the RF digital circuits. Moreover, we propose a multi-stage comb filter architecture with polyphase decomposition to reduce the power consumption. The receiver is measured for three different standards in the 2.4 GHz ISM-band. Measurement results show that the receiver achieves 79 dB, 73 dB and 63 dB of dynamic range for the Bluetooth, ZigBee and WiFi standards respectively. The complete receiver, implemented in 130 nm CMOS process, has a 300 MHz tunable central frequency and consumes 63 mW under 1.2 V supply. Compared to other SDR receivers, the proposed circuit consumes 30% less power, the DR is 21 dB higher, IIP3 is 6 dB higher and the overall Figure of Merit is 24 dB higher
5

Dasgupta, Abhijeet. "High efficiency S-Band vector power modulator design using GaN technology." Thesis, Limoges, 2018. http://www.theses.fr/2018LIMO0021/document.

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L’évolution des systèmes de télécommunications, liée à une demande sans cesse croissante en termes de débit et de volume de données, se concrétise par le développement de systèmes proposant des bandes passantes très larges, des modulations à très hautes efficacités spectrales, de la flexibilité en puissance et en fréquence d’émission. Par ailleurs, la mise en œuvre de ces dispositifs doit se faire avec un souci permanent d’économie d’énergie d’où la problématique récurrente de l’amplification de puissance RF qui consiste à allier au mieux rendement, linéarité et bande passante. L’architecture conventionnelle d’une chaine d’émission RF consiste dans une première étape à réaliser l’opération de modulation-conversion de fréquence (Modulateur IQ) puis dans une deuxième étape l’opération de conversion d’énergie DC-RF (Amplificateur de Puissance), ces deux étapes étant traditionnellement traitées de manière indépendante. L’objectif de ces travaux de thèse est de proposer une approche alternative qui consiste à combiner ces deux opérations dans une seule et même fonction : le modulateur vectoriel de puissance à haute efficacité énergétique. Le cœur du dispositif, conçu en technologie GaN, repose sur un circuit à deux étages de transistors HEMT permettant d’obtenir un gain en puissance variable en régime de saturation. Il est associé à un modulateur de polarisation multi-niveaux spécifique également en technologie GaN. Le dispositif réalisé a permis de générer directement, à une fréquence de 2.5 GHz, une modulation vectorielle 16QAM (100Msymb/s) de puissance moyenne 13 W, de puissance crête 25W avec un rendement global de 40% et une linéarité mesurée par un EVM à 5%
The evolution of telecommunications systems, linked to a constantly increasing demand in terms of data rate and volume, leads to the development of systems offering very wide bandwidths, modulations with very high spectral efficiencies, increased power and frequency flexibilities in transmitters. Moreover, the implementation of such systems must be done with a permanent concern for energy saving, hence the recurring goal of the RF power amplification which is to combine the best efficiency, linearity and bandwidth. Conventional architectures of RF emitter front-ends consist in a first step in performing the frequency modulation-conversion operation (IQ Modulator) and then in a second step the DC-RF energy conversion operation (Power Amplifier), these two steps being usually managed independently. The aim of this thesis is to propose an alternative approach that consists in combining these two operations in only one function: a high efficiency vector power modulator. The core of the proposed system is based on a two-stage GaN HEMT circuit to obtain a variable power gain operating at saturation. It is associated with a specific multi-level bias modulator also design using GaN technology. The fabricated device generates, at a frequency of 2.5 GHz, a 16QAM modulation (100Msymb/s) with 13W average power, 25W peak power, with an overall efficiency of 40% and 5% EVM
6

Ayad, Mohammed. "Etude et Conception d’amplificateurs DOHERTY GaN en technologie Quasi - MMIC en bande C." Thesis, Limoges, 2017. http://www.theses.fr/2017LIMO0027.

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Ce travail répond à un besoin industriel accru en termes d’amplification des signaux sur porteuses à enveloppes variables utilisés par les systèmes de télécommunications actuels. Ces signaux disposent d’un fort PAPR et d’une distribution statistique d’enveloppe centrée en-deçà de la valeur crête d’enveloppe. La raison pour laquelle les industriels télécoms requièrent alors des amplificateurs de très fortes puissances de sortie, robustes, fiables et ayant une dépense énergétique optimale le long de la dynamique d’enveloppe associée à un niveau de linéarité acceptable. Ce document expose les résultats d’étude et de réalisation de deux Amplificateurs de Puissance Doherty (APD) à haut rendement encapsulés en boîtiers plastiques QFN. Le premier est un amplificateur Doherty symétrique classique (APD-SE) et le second est un amplificateur à deux entrées RF (APD-DE). Ces démonstrateurs fonctionnant en bande C sont fondés sur l’utilisation de la technologie Quasi-MMIC associant des barrettes de puissance à base des transistors HEMTs AlGaN/GaN sur SiC à des circuits d’adaptation en technologie ULRC. L’approche Quasi-MMIC associée à la solution d’encapsulation plastique QFN permettant une meilleure gestion des comportements thermiques offre des performances électriques similaires à celles de la technologie MMIC avec des coûts et des cycles de fabrication très attractifs. Durant ces travaux, une nouvelle méthode d’évaluation des transistors dédiés à la conception d’amplificateurs Doherty a été développée et mise en oeuvre. L’utilisation intensive des simulations électromagnétiques 2.5D et 3D a permis de bien prendre en compte les effets de couplages entre les différents circuits dans l’environnement du boîtier QFN. Les résultats des tests des amplificateurs réalisés fonctionnant sur une bande de 1GHz ont permis de valider la méthode de conception et ont montré que les concepts avancés associés à l’approche Quasi-MMIC ainsi qu’à des technologies d’encapsulation plastique, peuvent générer des fonctions micro-ondes innovantes. Les caractérisations de l’APD-DE ont relevé l’intérêt inhérent à la préformation des signaux d’excitation et des points de polarisation de chaque étage de l’amplificateur
This work responds to an increased industrial need for on carrier signals with variable envelope amplification used by current telecommunications systems. These signals have a strong PAPR and an envelope statistical distribution centred below the envelope peak value, the reason why the telecom industrialists then require a robust and reliable high power amplifiers having an energy expenditure along of the envelope dynamics associated with an acceptable level of linearity. This document presents the results of the study and realization of two, high efficiency, Doherty Power Amplifiers (DPA) encapsulated in QFN plastic packages. The first is a conventional Doherty power Amplifier (DPA-SE) and the second is a dual-input Doherty power amplifier (DPA-DE). These C-band demonstrators are based on the use of Quasi-MMIC technology combining power bars based on the AlGaN/GaN transistors on SiC to matching circuits in ULRC technology. The Quasi-MMIC approach combined with Quasi-MMIC approach combined with QFN plastic package solution for better thermal behaviour management offers electrical performances similar to those of MMIC technology with very attractive coasts and manufacturing cycles. During this work, a new evaluation method for the transistors dedicated to the design of DPA was developed and implemented. The intensive use of 2.5D and 3D electromagnetic simulations made it possible to take into account the coupling effects existing between the different circuits in the QFN package environment. The results of the tests of the amplifiers realised and operating on 1GHz bandwidth validated the design method and showed that the advanced concepts associated with the Quasi-MMIC approach as well as plastic encapsulation technologies can generate innovative microwave functions. The characterizations of the DPA-DE have noted the interest inherent in the preformation of the excitation signals and the bias points of each stage of the amplifier
7

Lablonde, Laurent. "Etude des non-linéarites de gain d'un amplificateur optique à semi-conducteur." Limoges, 1996. http://www.theses.fr/1996LIMO0029.

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Les non-linearites de gain d'un amplificateur optique a semi-conducteurs interviennent negativement ou positivement dans les reseaux de telecommunications optiques. Nous presentons dans ce memoire l'etude de ces non-linearites et des configurations permettant de les reduire ou de les exploiter selon l'orientation souhaitee. Un signal d'intensite saturante peut etre particulierement distordu a l'amplification lorsque sa variation d'intensite est au moins du meme ordre de grandeur que le temps de vie des porteurs de la zone active. La reduction du contraste et la derive frequentielle en sont les principales caracteristiques et augmentent de ce fait le taux d'erreurs d'une transmission numerique. La nouvelle technique de transmission d'un multiplex de longueurs d'onde est elle aussi handicapee en raison de la saturation du gain sur toute la bande passante. On peut augmenter l'intensite de saturation du module amplificateur en realisant une contre-reaction optique selective en longueur d'onde. Le gain est alors stabilise sur une plus large gamme de valeur d'intensite du signal. Nous avons etudie la stabilisation du gain obtenue par un tel systeme dans le cas d'une information numerique avec une cavite constituee de reseaux photoinscrits dans les fibres d'acces. D'autre part, ces non-linearites de gain peuvent etre utilisees pour realiser des fonctions optiques comme la conversion de longueur d'onde par saturation croisee de gain. Nous presentons dans ce travail les resultats experimentaux et une analyse theorique d'un nouveau dispositif que nous avons mis au point, permettant de regenerer le contraste d'un signal numerique converti. Il remet en valeur les convertisseurs a saturation croisee de gain, plus simples et robustes que les convertisseurs interferometriques en cours d'etude, qui peuvent par ailleurs aussi etre integres dans le dispositif propose
8

Oksasoglu, Ali 1960. "GAIN-BANDWIDTH EFFECTS IN THE STATE-VARIABLE FILTERS." Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/276419.

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Rahmatian, Behnoosh. "A 75-dB digitally programmable CMOS variable gain amplifier." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/32248.

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A 75-dB DIGITALLY PROGRAMMABLE CMOS VARIABLE GAIN AMPLIFIER Variable-gain amplifiers (VGAs) are essential building blocks of many communication systems. In this thesis, a monolithic low-power digitally programmable VGA with 75dB of gain range is presented. The VGA is targeted for power line communication systems in particular for automotive application; however, it is a generic block that can be use in other applications. The core of the design is based on the low-distortion source-degenerated differential amplifier structure. A gm-boosting circuit is also used to provide higher gain and improve gain accuracy. In this work, to control the gain a new technique is used which is based on digitally controlling: 1) the source-degeneration resistance, and 2) an additional resistance between the differential output nodes of each gain stage. The changes in the source-degeneration resistance handle the coarse tuning, and the changes in the latter resistance are used for fine gain tuning. The overall VGA consists of three such gain stages. As a proof of concept, a single gain stage with a gain range of 24dB and programmable in 2dB gain steps has been fabricated in a 0.18μm CMOS technology. The chip is tested and measurement results are obtained. Based on these measurement results, the design of the gain stage is optimized and a three-stage 75dB VGA is designed. Each stage has a digitally tunable gain range of 25dB, and fine gain tuning of 2.5dB per step. The bandwidth of the VGA is higher than 140MHz, and the gain error is less than 0.3dB. The overall VGA draws 6.5mA from a 1.8V supply. The noise figure of the system at maximum gain is 12.5dB, and the IIP3 is 14.4dBm at minimum gain. These performance parameters are either better or compare favorably with the reported state-of-the-art VGAs.
Applied Science, Faculty of
Electrical and Computer Engineering, Department of
Graduate
10

Jha, Nand Kishore. "Design of a complementary silicon-germanium variable gain amplifier." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24614.

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Books on the topic "Amplificateur à gain variable":

1

Nesim, Halyo, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Division., eds. A Variable-gain output feedback control design methodology. [Washington, DC]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1989.

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Halyo, Nesim. A variable-gain output feedback control design methodology. Hampton, Va: Langley Research Center, 1989.

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Services, Watson Wyatt Data. Decision maker's guide to variable pay. Rochelle Park, NJ (218 Route 17 North, Rochelle Park 07662): Watson Wyatt Data Services, 1999.

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Ostroff, Aaron J. Application of variable-gain output feedback for high-alpha control. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1990.

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Ostroff, Aaron J. Application of variable-gain output feedback for high-alpha control. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1990.

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Ostroff, Aaron J. Application of variable-gain output feedback for high-alpha control. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1990.

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S, Mehta R., and United States. National Aeronautics and Space Administration., eds. Adaptive control and noise suppression by a variable-gain gradient algorithm. [Washington, DC]: National Aeronautics and Space Administration, 1987.

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Center, Langley Research, and United States. National Aeronautics and Space Administration., eds. Redesign of a variable-gain output feedback longitudinal controller flown on the High-Alpha Research Vehicle. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1998.

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Center, Langley Research, and United States. National Aeronautics and Space Administration., eds. Redesign of a variable-gain output feedback longitudinal controller flown on the High-Alpha Research Vehicle. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1998.

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Center, Langley Research, and United States. National Aeronautics and Space Administration., eds. Redesign of a variable-gain output feedback longitudinal controller flown on the High-Alpha Research Vehicle. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1998.

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Book chapters on the topic "Amplificateur à gain variable":

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Self, Douglas. "Variable Gain Stages." In Small Signal Audio Design, 199–213. Third edition. | Abingdon, Oxon ; New York, NY : Routledge, 2020.: Focal Press, 2020. http://dx.doi.org/10.4324/9781003031833-8.

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Self, Douglas. "Variable gain stages." In Small Signal Audio Design, 237–52. 4th ed. New York: Focal Press, 2023. http://dx.doi.org/10.4324/9781003332985-8.

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Hauser, Max W., Eric A. M. Klumperink, Robert G. Meyer, and William D. Mack. "Variable-Gain, Variable-Transconductance, and Multiplication Techniques: A Survey." In Analog Circuit Design, 291–322. Boston, MA: Springer US, 2001. http://dx.doi.org/10.1007/978-1-4613-1443-1_14.

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Valenta, J., K. Luterová, R. Tomasiunas, K. DohnalovÁ, B. Hönerlage, and I. Pelant. "Optical Gain Measurements With Variable Stripe Length Technique." In Towards the First Silicon Laser, 223–42. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0149-6_21.

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Zhang, Chenghui, Le Chang, and Cheng Fu. "Variable Gain Control for Large-Scale Feedforward Nonlinear Systems." In Variable Gain Control and Its Applications in Energy Conversion, 83–100. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003392927-8.

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Zhang, Chenghui, Le Chang, and Cheng Fu. "Variable Gain Control for Discrete-Time Feedforward Nonlinear Systems." In Variable Gain Control and Its Applications in Energy Conversion, 71–80. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003392927-7.

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Zhang, Chenghui, Le Chang, and Cheng Fu. "Variable Gain Control for Feedforward Nonlinear Multi-Agent Systems." In Variable Gain Control and Its Applications in Energy Conversion, 101–12. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003392927-9.

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Shtessel, Yuri, Leonid Fridman, Antonio Rosales, and Chandrasekhara Bharath Panathula. "Practical Stability Phase and Gain Margins Concept." In Advances in Variable Structure Systems and Sliding Mode Control—Theory and Applications, 101–32. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62896-7_4.

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Chen, Sherry Xi, and Georg Seelig. "A DNA Neural Network Constructed from Molecular Variable Gain Amplifiers." In Lecture Notes in Computer Science, 110–21. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-66799-7_8.

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Zhang, Chenghui, Le Chang, and Cheng Fu. "Variable Gain Control of Three-Phase AC/DC Power Converters." In Variable Gain Control and Its Applications in Energy Conversion, 125–36. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003392927-11.

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Conference papers on the topic "Amplificateur à gain variable":

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Li, Chun-Yi, Yu-Bin Lin, and Robert Rieger. "Microwatt low-noise variable-gain amplifier." In Technology (ICICDT). IEEE, 2011. http://dx.doi.org/10.1109/icicdt.2011.5783218.

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Raikos, George, and Spyridon Vlassis. "0.8V bulk-driven variable gain amplifier." In 2010 17th IEEE International Conference on Electronics, Circuits and Systems - (ICECS 2010). IEEE, 2010. http://dx.doi.org/10.1109/icecs.2010.5724524.

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Baumgratz, Filipe D., Hao Li, Sergio Bampi, and Carlos E. Saavedra. "Wideband Low Noise Variable Gain Amplifier." In SBCCI '15: 28th Symposium on Integrated Circuits and Systems Design. New York, NY, USA: ACM, 2015. http://dx.doi.org/10.1145/2800986.2801029.

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Emira, Ahmed, and Edgar Sánchez-Sinencio. "Variable gain amplifier with offset cancellation." In the 13th ACM Great Lakes Symposium. New York, New York, USA: ACM Press, 2003. http://dx.doi.org/10.1145/764808.764877.

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Moro-Frias, D., M. T. Sanz-Pascual, and C. A. de la Cruz-Bias. "Linear-in-dB Variable Gain Amplifier with PWL exponential gain control." In 2010 IEEE International Symposium on Circuits and Systems - ISCAS 2010. IEEE, 2010. http://dx.doi.org/10.1109/iscas.2010.5536984.

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Wey, Todd A., and William D. Jemison. "An automatic gain control circuit with TiO2 memristor variable gain amplifier." In 2010 8th IEEE International NEWCAS Conference (NEWCAS). IEEE, 2010. http://dx.doi.org/10.1109/newcas.2010.5603719.

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Li Yin, Ting-Hua Yun, Jian-Hui Wu, and Long-Xing Shi. "A CMOS Low-Distortion Variable Gain Amplifier with Exponential Gain Control." In 2006 IEEE Asian Solid-State Circuits Conference. IEEE, 2006. http://dx.doi.org/10.1109/asscc.2006.357929.

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Park, Geon Ho, Jae Kwang Kwon, Dong Min Kang, and Chul Soon Park. "A 60-GHz Variable Gain Amplifier with Phase-compensated Variable Attenuator." In 2021 IEEE 20th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems (SiRF). IEEE, 2021. http://dx.doi.org/10.1109/sirf51851.2021.9383343.

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Monsurro, Pietro, Alessandro Trifiletti, and Trond Ytterdal. "A novel transimpedance amplifier with variable gain." In 2010 NORCHIP. IEEE, 2010. http://dx.doi.org/10.1109/norchip.2010.5669441.

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Palena, Patricia. "Variable-gain MMIC module for space application." In Orlando '91, Orlando, FL, edited by Regis F. Leonard and Kul B. Bhasin. SPIE, 1991. http://dx.doi.org/10.1117/12.44484.

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Reports on the topic "Amplificateur à gain variable":

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Psuty, Norbert, Christopher Menke, Katherine Ames, Andrea Aabeck, and Casey Jones. Shoreline position and coastal topographical change monitoring at Assateague Island National Seashore: 2005–2020 trend report. National Park Service, April 2022. http://dx.doi.org/10.36967/nrr-2293154.

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Abstract:
This trend report summarizes the results of shoreline position and coastal topography surveys conducted semi-annually from the spring of 2005 through the fall of 2020. Shoreline position was collected in the Assateague Island National Seashore (ASIS), the Assateague State Park, and the Chincoteague National Wildlife Refuge, whereas coastal topography was collected only in the Assateague Island National Seashore and the Assateague State Park. The assembled datasets are processed to provide spatial depictions and statistical analyses of annual changes, 5-year changes, and the extended 15-year changes. Although there were considerable variations in the alongshore dimensions of change, the largest and most consistent vectors of annual shoreline position and coastal topography changes were produced by storm impacts, such as Hurricane Sandy and the winter storms in 2016, followed by the subsequent recovery. As a result of Hurricane Sandy (October 2012), the entire oceanside shoreline position of Assateague Island was displaced inland, and there was a loss of total cross-section area in the profiles. There was variable recovery post-Hurricane Sandy in both the shoreline position and coastal topography profiles. The winter of 2016 was also particularly stormy and had a higher mean net landward shoreline position displacement than post-Hurricane Sandy. Throughout the survey period, the termini of the island were exceptionally dynamic. The northern 2.5 km of Assateague Island National Seashore had a mean net seaward displacement, whereas the southern portion of the Chincoteague National Wildlife Refuge was the site of major inland displacement along the oceanside and as well as downdrift seaward extension of Toms Cove Hook. From 2005 through 2020, the only section of the oceanside shoreline position that had a positive trend of mean net displacement was the northernmost portion of Assateague Island, associated with local conditions created by the presence of the ebb tide delta and the Ocean City inlet jetty. All other parts of the ocean shoreline position had a negative trend of change; the highest rate of erosion occurred at the southern portion of Chincoteague National Wildlife Refuge. Contrary to the oceanside shoreline position, a portion of the Toms Cove Hook shoreline had a trend of seaward displacement as the spit extended in the direction of sediment transport. Other trends occurred in the areas where profiles were surveyed. Most of the dune area in ASIS gained in cross-section over time, except for portions of Assateague State Park. The dune elevation tended to gain in ASIS North and lower in ASIS South. Other than the profiles in Assateague State Park, the total cross-section area increased, with the highest rate of cross-section area gain in the northern portion of Assateague Island.
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Tummala, Rohan, Andrew de Jesus, Natasha Tillett, Jeffrey Nelson, and Christine Lamey. Clinical and Socioeconomic Predictors of Palliative Care Utilization. University of Tennessee Health Science Center, January 2021. http://dx.doi.org/10.21007/com.lsp.2020.0006.

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INTRODUCTION: Palliative care continues to gain recognition among primary care providers, as patients suffering from chronic conditions may benefit from use of this growing service. OBJECTIVES: This single-institution quality improvement study investigates the clinical characteristics and socioeconomic status (SES) of palliative care patients and identifies predictors of palliative care utilization. METHODS: Retrospective chart review was used to compare clinical and SES parameters for three groups of patients: (1) palliative care patients who attended at least one visit since the inception of the University Clinical Health Palliative Care Clinic in Memphis, TN in October 2018 (n = 61), (2) palliative care patients who did not attend any appointments (n = 19), and (3) a randomized group of age-matched primary care patients seen by one provider from May 2018 to May 2019 (n = 36). A Poisson regression model with backward conditional variable selection was used to determine predictors of palliative care utilization. RESULTS: Patients across the three care groups did not differ in demographic parameters. Compared to palliative care-referred non-users and primary care patients, palliative care patients tended to have lower health risk (p < 0.001). Palliative care patients did not differ from primary care patients in socioeconomic status but did differ in comorbidity distribution, having a higher prevalence of cancer (𝜒2 = 14.648, df = 7, p = 0.041). Chance of 10-year survival did not differ across risk categories for palliative care patients but was significantly lower for very high-risk compared to moderate-risk primary care patients (30% vs. 78%, p = 0.019). Significant predictors of palliative care use and their corresponding incidence rate ratios (IRR) were hospital referral (IRR = 1.471; p = 0.039), higher number of prescribed medications (IRR = 1.045; p = 0.003), lower Charlson Comorbidity Index (IRR = 0.907; p = 0.003), and lower systolic blood pressure (IRR = 0.989; p = 0.004). CONCLUSIONS: Patients who are expected to benefit from and of being high utilizers of palliative care may experience greater clinical benefit from earlier referral to this service.
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Osorio, Itzel, Camillie Delevaux, Ricardo Perez-Cuevas, Gabriela García, Rene Kuster, Nanika Braithwaite, Brendalee Adderley, and Luis Tejerina. Associated Factors of Healthy Lifestyle in the Bahamas. Inter-American Development Bank, January 2018. http://dx.doi.org/10.18235/0009376.

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The Bahamas faces critical challenges due to an increase in chronic diseases (CDs). Overweight and obesity are on the rise among all age groups. In addition, the prevalence of raised blood glucose is 13% and that of high blood pressure is 31%. CDs are responsible for 45% of deaths in the country. The Ministry of Health has been implementing programs and interventions to slow the growth of CDs. These programs focus on tackling risk factors and developing both the National Dietary Guidelines and the nutrition interventions implemented in primary care facilities and in the community. This study is justifiable as it will help gain an in-depth understanding of the current patterns of healthy lifestyle among the Bahamian population to inform national efforts to address the growing problem of CDs. The objective of this study was to analyse and identify the determinants associated with healthy lifestyle in The Bahamas. The study was a secondary analysis of the 2013 Household Expenditure Survey (BHES-2013). The survey covered 2,123 households that were randomly selected throughout the country. The healthy lifestyle module registered data about eating habits and leisure time activities, such as exercising or watching television. The dependent variable selected for this study was the healthy lifestyle index (HLI), composed of four domains: healthy nutrition, healthy screen time, regular physical activity, and non-secondhand smoke. We find that a significant proportion of Bahamian children and adults require additional actions to facilitate improvement of their healthy lifestyle. Less than 8% eat fruits and vegetables three times per day, only one-third watch TV or play computer video games less than two hours per day, and only 30% practice regular physical activity. Teenagers tend to be sedentary. Lower-income level groups were less sedentary and had less screen time than upper-income level groups. Also, a child living in an extended family (two or more siblings) had a greater probability of living a healthy lifestyle. Similarly, being an adult (age 20 to 64 years) and being married or having a partner were associated with a greater likelihood of leading a healthy way of life.

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