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Relevant bibliographies by topics / Amplified environments / Dissertations / Theses

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Dissertations / Theses on the topic 'Amplified environments'

Author: Grafiati

Published: 4 June 2025

Last updated: 15 July 2025

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1

Pettersson, Robin, and Sahag Normanian. "Low-Consuming Class D Amplifier For Rough Environments." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-12272.

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2

McKinley, Michael Dean. "Improved frequency domain measurement techniques for characterizing power amplifier and multipath environments." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24722.

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Thesis (Ph.D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: James Stevenson Kenney; Committee Member: Gregory David Durgin; Committee Member: Madhavan Swaminathan

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3

Ghassemi, Hamed 1964. "Design and simulation of an improved operational amplifier for use in radiation environments." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/276987.

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The effects of radiation on an operational amplifier were investigated through simulation. The μA 741 was simulated using Spice. Under normal conditions the 741 had the following properties: offset Voltage (Vos) of 0.8 mV, bias current (IB) of 27 nA, offset current (Ios) of 1 nA, and an open loop gain (A0.1.) of 112 dB. When exposed to neutron fluence of 5 x 10¹³ n/cm², these parameters changed to offset voltage of 45 mV, bias current of 1500 nA, offset current of 500 nA, and an open loop gain of 66 dB. A new circuit is proposed that provides improvements in the above parameters. The modified

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4

Cunningham, Michael Lawrence. "A High Temperature Wideband Low Noise Amplifier." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/78388.

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As the oil industry continues to drill deeper to reach new wells, electronics are being required to operate at extreme pressures and temperatures. Coupled with substantial real-time data targets, the need for robust high speed electronics is quickly on the rise. This paper presents a high temperature wideband low noise amplifier (LNA) with zero temperature coefficient maximum available gain (ZTCMAG) biasing for a downhole communication system. The proposed LNA is designed and prototyped using 0.25μm GaN on SiC RF transistor technology, which is chosen due to the high junction temperature capab

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5

Krithivasan, Ramkumar. "Design of High-Speed SiGe HBT BiCMOS Circuits for Extreme Environment Applications." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14505.

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The objective of this work is to investigate the suitability of applying silicon-germanium (SiGe) heterojunction bipolar transistor (HBT) bipolar complementary metal oxide semiconductor (BiCMOS) technology to extreme environments and to design high-speed circuits in this technology to demonstrate their reliable operation under these conditions. This research focuses on exploring techniques for hardening SiGe HBT digital logic for single event upset (SEU) based on principles of radiation hardening by design (RHBD) as well as on the cryogenic characterization of SiGe HBTs and designing broadband

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6

Cheng, Peng. "Reliability of SiGe HBTs for extreme environment and RF applications." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/42836.

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The objective of the proposed research is to characterize the safe-operating-area of silicon-germanium (SiGe) heterojunction bipolar transistors (HBTs) under radiofrequency (RF) operation and extreme environments. The degradation of SiGe HBTs due to mixed-mode DC and RF stress has been modeled for the first time. State-of-the-art 200 GHz SiGe HBTs were first characterized, and then DC and RF stressed. Excess base leakage current was modeled as a function of the stress current and voltage. This physics-based stress model was then designed as a sub-circuit in Cadence, and incorporated into SiGe

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7

Hiemstra, Stephen Reza. "A High Temperature Wideband Power Amplifier for a Downhole Communication System." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/78387.

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As the oil industry continues to drill deeper to reach previously untapped wells, the operating environments for electronic systems become harsher, especially due to high temperatures. It is essential to design electronic circuits and systems to be able to withstand these extreme temperatures. The proposed power amplifier (PA) has been designed for a downhole communication system operating at an ambient temperature of 230oC. GaN technology was chosen primarily due to its ability to function at a high junction temperature. The proposed PA was designed with Qorvo's T2G6003028-FL HEMT as it opera

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8

Ehteshamuddin, Mohammed. "Design of a High Temperature GaN-Based Variable Gain Amplifier for Downhole Communications." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/74958.

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The decline of easily accessible reserves pushes the oil and gas industry to explore deeper wells, where the ambient temperature often exceeds 210 °C. The need for high temperature operation, combined with the need for real-time data logging has created a growing demand for robust, high temperature RF electronics. This thesis presents the design of an intermediate frequency (IF) variable gain amplifier (VGA) for downhole communications, which can operate up to an ambient temperature of 230 °C. The proposed VGA is designed using 0.25 μm GaN on SiC high electron mobility transistor (HEMT) techno

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9

Lohmeyer, Whitney Quinne. "Space radiation environment impacts on high power amplifiers and solar cells on-board geostationary communications satellites." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98682.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 273-292).<br>Communications satellite operators maintain archives of component telemetry to monitor system function. Operators generally do not typically use the telemetry data for scientific analysis of the space radiation environment effects on component anomalies or performance. We partnered with four geostationary (GEO) operators, acquired >1 million hours of telemetry, and combined these data with sp

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10

Gray, Miranda M. "Genomic differentiation of big bluestem (Andropogon gerardii) along the Great Plains’ environmental gradient." Thesis, Kansas State University, 2012. http://hdl.handle.net/2097/14626.

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Master of Science<br>Department of Plant Pathology<br>Eduard D. Akhunov<br>Loretta C. Johnson<br>Big bluestem (Andropogon gerardii Vitman) is an ecologically dominant grass of the North American grasslands with precipitation-dependent productivity. However, climatic predictions for big bluestem’s dominant range in the Great Plains include increased periods of drought. The main objectives of this research were to determine the extent of neutral and non-neutral genetic differentiation and diversity among putative big bluestem ecotypes using amplified fragment length polymorphism (AFLP) marke

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11

Moghimi, Ahmad. "Side-Channel Attacks on Intel SGX: How SGX Amplifies The Power of Cache Attack." Digital WPI, 2017. https://digitalcommons.wpi.edu/etd-theses/399.

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In modern computing environments, hardware resources are commonly shared, and parallel computation is more widely used. Users run their services in parallel on the same hardware and process information with different confidentiality levels every day. Running parallel tasks can cause privacy and security problems if proper isolation is not enforced. Computers need to rely on a trusted root to protect the data from malicious entities. Intel proposed the Software Guard eXtension (SGX) to create a trusted execution environment (TEE) within the processor. SGX allows developers to benefit from the h

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12

Banerjee, Debashis. "Intelligent real-time environment and process adaptive radio frequency front-ends for ultra low power applications." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53882.

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In the thesis the design of process tolerant, use-aware radio-frequency front-ends were explored. First, the design of fuzzy logic and equation based controllers, which can adapt to multi-dimensional channel conditions, are proposed. Secondly, the thesis proves that adaptive systems can have multiple modes of operation depending upon the throughput requirements of the system. Two such modes were demonstrated: one optimizing the energy-per-bit (energy priority mode) and another achieving the lowest power consumption at the highest throughput (data priority mode). Finally, to achieve process tol

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13

Medford, Elizabeth. "Using Cleaved Amplified Polymorphic Sequence (CAPS) Genetic Markers to Determine the Extent of Hybridization between Castilleja affinis and Castilleja mollis as a Mechanism for Adapting to Climate Change on Santa Rosa Island." Scholarship @ Claremont, 2016. http://scholarship.claremont.edu/scripps_theses/820.

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Hybridization, the process of interbreeding between individuals of different species, is one method by which plants and animals adapt to a changing environment. One example of such adaptation through hybridization may be occurring on the California Channel Islands with two species of Castilleja. While United State Geological Survey (USGS) researchers have been studying the populations of Castilleja affinis and Castilleja mollis to determine if hybridization is occurring on Santa Rosa Island since the early 1990s, up until this point primarily overt phenotypic characteristics have been used to

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14

Palma, Giuseppe. "Design of microlaser in medium infrarer wavelengnth range for biomedicine and environmental monitoring." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S017/document.

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Les micro-résonateurs optiques comptent parmi les dispositifs les plus importants en photonique. Les résonateurs WGM sont assez particuliers. Il s'agit de composant présentant une symétrie circulaire comme c'est le cas des sphères, des anneaux, des disques et des tores. Les résonateurs WGM présentent un facteur de qualité exceptionnel et un volume modal très faible. Ces appareils peuvent être utilisés dans plusieurs domaines, notamment la télédétection, le filtrage optique et l'optique non linéaire. D'autres applications sont possibles en biologie, médecine, spectroscopie moléculaire, surveill

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15

Perbet, Lucas. "Optimisation de blocs constitutifs d'un convertisseur A/N pipeline entechnologie CMOS 0.18 µm pour utilisation en environnement spatial." Thesis, Toulouse, INPT, 2017. http://www.theses.fr/2017INPT0037/document.

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L’imagerie constitue un axe majeur de l’exploration de l’univers et de la Terre depuis l’espace, que l’on se trouve dans le domaine du visible ou non. Ainsi dans le domaine spatial, les données sont le plus souvent récupérées par un capteur CCD (Charge-Coupled Device, ou Dispositif à Transfert de Charge (DTC)) qui fournit des tensions analogiques vers un convertisseur analogique-numérique (CAN), dont la sortie sera transmise à une chaîne de traitement, puis envoyée sur terre. Ainsi, les CAN sont des éléments clés dans l’imagerie par satellite. De leur précision et de leur vitesse va dépendre l

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16

Raikar, S. V. "Protoplast fusion of Lolium perenne and Lotus corniculatus for gene introgression." Diss., Lincoln University, 2007. http://hdl.handle.net/10182/301.

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Lolium perenne is one of the most important forage crops globally and in New Zealand. Lotus corniculatus is a dicotyledonous forage that contains valuable traits such as high levels of condensed tannins, increased digestibility, and high nitrogen fixing abilities. However, conventional breeding between these two forage crops is impossible due to their markedly different taxonomic origin. Protoplast fusion (somatic hybridisation) provides an opportunity for gene introgression between these two species. This thesis describes the somatic hybridisation, the regeneration and the molecular analysis

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17

Syed, Jameel. "Effect of amplifier non-linearity on the performance of CDMA communication systems in a Rayleigh fading environment /." 2009. http://hdl.handle.net/10413/936.

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18

"Effect of amplifier non-linearity on the performance of CDMA communication systems in a Rayleigh fading environment." Thesis, 2010. http://hdl.handle.net/10413/744.

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19

Terry, Stephen Christopher. "Development of a high-efficiency, low-power RF power amplifier for use in a high-temperature environment." 2002. http://etd.utk.edu/2002/TerryStephen.pdf.

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Thesis (M.S.)--University of Tennessee, Knoxville, 2002.<br>Title from title page screen (viewed on Oct. 1, 2002). Thesis advisor: Syed Islam. Document formatted into pages (ix, 92 p. : ill.). Vita. Includes bibliographical references (p. 79-82).

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20

PALMA, Giuseppe. "Design of microlaser in medium infrared wavelength range for biomedicine and environmental monitoring." Doctoral thesis, 2017. http://hdl.handle.net/11589/98914.

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I micro-risonatori ottici svolgono un ruolo importantissimo nella fotonica moderna. In particolare negli ultimi anni l’attenzione si è concentrata sui micro-risonatori a simmetria circolare, come ad esempio micro-sfere, micro-anelli, micro-dischi e micro-toroidi. Essi sono caratterizzati da dimensioni particolarmente ridotte, fattori di qualità eccezionalmente alti e volumi modali bassissimi diventando così una valida alternativa ai tradizionali micro-risonatori ottici come le cavità Fabry-Pérot. Questi dispositivi trovano applicazione in numerosi ambiti, come la sensoristica, il filtraggio ot

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21

Σαζακλή, Ελένη. "Ταυτοποίηση ψευδομονάδων που απομονώνονται από το υδάτινο περιβάλλον με βιοχημικές, ηλεκτροφορητικές και μοριακές τεχνικές". 2004. http://nemertes.lis.upatras.gr/jspui/handle/10889/390.

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Τρεις ευρέως χρησιμοποιούμενες μέθοδοι τυποποίησης, μια βιοχημική (API20NE), μια φαινοτυπική (SDS-PAGE) και μια μοριακή (RAPD) χρησιμοποιήθηκαν για την ταυτοποίηση και ταξινόμηση 160 περιβαλλοντικών ψευδομονάδων που απομονώθηκαν από το υδάτινο περιβάλλον της Νοτιοδυτικής Ελλάδας και συγκεκριμένα από εμφιαλωμένα νερά (46%), νερά δικτύου ύδρευσης (16%), κολυμβητικών δεξαμενών (9%) και θαλασσών (29%). Οι ψευδομονάδες ταυτοποιήθηκαν με βάση το βιοχημικό τους αποτύπωμα δια μέσου του συστήματος ΑΡΙ20ΝΕ, και στη συνέχεια υποβλήθηκαν σε ηλεκτροφόρηση των ολικών πρωτεϊνών τους (SDS-PAGE) και σε ανάλυση

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