Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 374 for “"PCB"”.
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Algorithmic studies on PCB routing
… As a result, a complex printed circuit board (PCB) can host more than ten thousand signal nets. Such a huge pin count and net count make manual design of packages and PCBs an extremely time-consuming and error-prone task. On the other hand, increasing clock frequency imposes various physical …
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New strategies for PCB routing
… advances rapidly, the dimensions of packages and PCBs are decreasing while the pin counts and routing layers keep increasing. Today, a high-performance PCB usually contains thousands of pins and more than ten signal layers. Moreover, the manufacturing constraints require all nets to be routed in …
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PCB-Based Heterogeneous Integration of LLC Converters
… (WBG) transistors, printed circuit board (PCB) windings may include magnetics. This dissertation offers a modular and scalable matrix transformer structure and its design technique, allowing any number of elemental transformers to be integrated into a single magnetic core with significantly …
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PCB-Based Heterogeneous Integration of PFC/Inverter
… embedded windings in the printed circuit board (PCB) is feasible. However, a PCB winding-based inductor has a fundamental limitation in terms of its power handling capability. The winding loss is proportional to the magnetomotive force (MMF), which is Ni. That is to say, with the number of layers …
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Physically Constrained PCB Placement Using Deep Reinforcement Learning
… exploration of Reinforcement Learning (RL) based PCB component placement with emphasis on physically verified placements. Unlike prior methods that rely on heuristic proxies for placement quality, this work focuses entirely on routing based metrics that result in functioning placements without the …
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PCB origami : folding circuit boards into electronic products
PCB origami is a concept for an alternative manufacturing process of electronic products, in which the electronic material will be manufactured flat and folded into functional 3D graspable products by the user. PCBs will be used both as the functional electronic material and the structural material …
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Bioremediation of Pcb Contaminated Surface Soil: A Microcosm Study
… VA). In this study, degradability of PCBs (Aroclor 1242) from an aged surface soil was evaluated using serum bottle microcosms containing aceticlastic methanogenic consortium, enriched from a municipal anaerobic digester. Two different experiments, "intermediate feed" and "starve and …
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PAH and PCB distribution in sediment fractions and sorptive phases
… focused on the relative distribution of PAHs and PCBs in size and density fractions of three sediments, which were physically separated for direct measurement of contaminants in the fractions and correlation to sorptive phase distribution. Oil and grease, soot, (non-black carbon) organic carbon …
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Package and PCB solutions for high-speed data link applications
… region at the package and Printed Circuit Board (PCB) interface is also analyzed in a co-study to suggest design rules for overall improved system performance.
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Application of Multi-Objective Genetic Optimization in PCB Component Placement
Designing a printed circuit board (PCB) is a complex process that involves creating a schematic, placing components, ensuring that every component is routable, and performing simulations to predict the behavior of the PCB before it is manufactured. With the rise of technological innovations, the …
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Einflussfaktoren auf die Mobilisierbarkeit von PCB und PAK in Rieselfeld-Bodenproben
… 57 Einzelsubstanzen, zu denen 4 PAK, 33 PCB und 20 OH-PCB zählten, wurde in Elutionsversuchen untersucht, die unter kinetisch kontrollierten Laborbedingungen durchgeführt wurden. Die Ergebnisse ermöglichen Aussagen über die Beeinflussung der Desorptionsmechanismen und Mobilisierbarkeit …
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Modeling and Optimization of the Microwave PCB Interconnects Using Macromodel Techniques
L'abstract è presente nell'allegato / the abstract is in the attachment
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Development of control system to automate the PCB pin insertion process
This thesis describes the development of the control system that runs the automated pin insertion machine in a surface mount technology assembly line. The control system is divided into 2 subsystems viz. pin sorting and pin insertion. The detailed design of the control system and its components is …
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Uridinediphosphate-glucuronosyltransferase (UDP-GT) Ontogeny and PCB Effects in Galliform Birds
… the effects of polychlorinated biphenyls (PCBs) on UDP-GT in developing precocial birds, we dosed chicken (Gallus domesticus) eggs with concentrations of PCB 126 from 0 to 0.80 ng/g egg (in sunflower oil) prior to incubation. Tissues were sampled at day 20 of the 21-day incubation and …
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Polychlorinated biphenyl (PCB) contamination in Pittsfield, Massachusetts : an investigation of public participation
… polluter, General Electric, regarding extensive PCB (polychlorinated biphenyl) contamination in Pittsfield, Massachusetts. In this case, government acted as a trustee on behalf of the public's interests in the negotiations. All individuals involved in the negotiation signed contracts of …
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Event-Driven Distributed Task Orchestration System with Applications to Automated PCB Design
Printed circuit board (PCB) design is the process of taking a board schematic and design constraints and realizing a manufacturable design. Electronic Design Automation (EDA) software allows humans to manually design PCB’s by placing components and routing the electrical connections required. …
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Thermal Design and Optimization for PCB Winding based High Frequency Planar Magnetics
This thesis presents an in-depth investigation into the thermal design and optimization of Planar magnetics. With system engineering approach, starting from a two stage DC/DC converter, and further extended to other types of resonant converters with planar core. The study aims to address the …
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Optimization of LLC Resonant Converters: State-trajectory Control and PCB based Magnetics
… can be integrated into printed circuit board (PCB) windings. This dissertation proposes a novel matrix transformer structure and its design methodology. On the other hand, shielding technique can be employed to suppress the CM noise for PCB winding transformer. This dissertation proposes a …
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PCB Effects on Brain Type II 5'Deiodinase Activity in Developing Brids
PCBs are known to cause thyroid disruption in laboratory rats and are thought to be the causal agent in thyroid gland alterations in herring gulls in the Great Lakes. This study examined the regulation of thyroid hormone supply during development in (1) domestic chicken embryos (Gallus domesticus) …
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Models predicting the performance of IC component or PCB channel during electromagnetic interference
… (IC) and the resulting power supply noise on the PCB. Distribution of dynamic currents is found through vectorless methods. Results demonstrate the approach can rapidly determine the average and standard deviation of the power supply noise voltage and the peak jitter within 5~15% error, which is …
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