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.
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Showing 1 to 20 of 105 for “"Passive Components"”.
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Multi-resonant passive components for power conversion
… frequency- and size-scaling limits of passive components. Power inductors and transformers, in particular, are challenging to miniaturize because of their poor performance when scaled down in size, and the difficulty of fabricating them with available planar processes. A family of …
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Ultra-thin moisture barrier coatings for passive components
Polymer Multi-Layer (PML) capacitors have demonstrated excellent performance for numerous power electronics applications, particularly where high temperature stability is required. These capacitors are sensitive to high humidity, and if they are not protected from moisture exposure their …
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Circuits and passive components for radio-frequency power conversion
This thesis focuses on developing technology for high efficiency power converters operating at very high frequencies. The work in the thesis involves two aspects of such converters: rf (radio-frequency) power circuit design techniques and magnetic material characterization and application. In the …
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Development of three-dimensional passive components for power electronics
… and forming constituent parts of electrical components. PCBs are not well suited to these tasks. A novel fabrication method is proposed to develop an enhanced circuit board fabrication approach which overcomes this problem. This method uses a photoresistive scaffold and subsequent …
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Passive components for dense optical integration based on high index-contrast
… numerical investigation of high index-contrast passive components that can serve as building blocks at the end-pointsand nodes of WDM communications systems. The main characteristic of these structures is their miniature size (on the order of the optical wavelength), and their low radiation loss …
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Millimeter-wave circuit design of coplanar integrated circuits and superconducting passive components
Wireless communication is revolutionizing global business. As the interactive personal communication service market grows, the need for high-frequency transmitters and receivers will increase. The wide bandwidth requirements of multimedia technology restrict the use of conventional radio and …
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3D Micromachined Passive Components and Active Circuit Integration for Millimeter-wave Radar Applications
… the design, fabrication and testing of various components of a highly integrated mm-wave a 94 Ghz monopulse radar transmitter/receiver. Several architectural approaches are considered, including passive and active implementations of RF monopulse comparator networks. These architectures are …
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Switchmode Power Supply Miniaturization with Emphasis on Integrated Passive Components on Prefired High Performance Ceramic Substrates
… research addresses high performance ceramic, passive component integration. Three key issues; electrical characterization, thermal analysis and simulation, and material characterization, are examined in this work. Thick film passive components (capacitors and resistors) on AlN have been …
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Multilevel capacitor-clamped DC-DC boost converter structure with soft-switching technique implementation for high power density achievement
… has an ability to reduce the size and volume of passive components and have similar characteristics with the conventional DC-DC converter. Principally, the inductance and inductor volume are directly proportional with each other as well as the capacitance and capacitor volume. By considering high …
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Millimeter-wave low-noise amplifiers using cost-effective ion-implanted MESFETs and coplanar transmission lines
… FETs, measurement and modeling of active and passive components, circuit design, simulation, fabrication, and characterization of the completed amplifiers.
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Code-error calibration techniques for two-step flash analog-to-digital converters
… has been limited to 10 bits by ratio mismatch of passive components. Although techniques such as laser-trimming, self-calibration and error-averaging have been developed to achieve high matching accuracy of components, they are not readily applied to flash-type ADCs.
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Power Electronics Meet Piezoelectrics: Converters, Components, and Miniaturization
… remain the bulkiest, lossiest, and costliest components in the systems they serve. Miniaturization of power electronics is fundamentally bottlenecked by passive components, particularly magnetics (i.e., inductors and transformers), which pose inherent size and performance challenges at small …
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Design of LCL-filters for grid-connected voltage source inverters
… than individual filtering contributions from passive components. The second study is extended to understand the limits of passive components based on the reactive power production limits (based on control structure), IEEE-519 harmonic limitations and the allowable switching losses or voltage …
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Optimization of Nonlinear Switch Cells for Switching Converters
… cells consist of an array of power switches and passive components which can replace the main switches alone in many power topologies, allowing reduced switching loss without altering the power topology directly. This thesis discusses the development of a switch cell topology that utilizes a …
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Performance of four-stage cascaded fiber optical parametric amplifier (FOPA) using optisystem
… bandwidth of the cascaded FOPA depends on the passive or active devices inserted in between the HNLF. However, the results at each stage of the cascaded FOPA are not discussed. The result at each stage is crucial to ensure that the cascaded FOPA is amplifying power at the respective stage which …
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Ion -Implanted GaAs MESFET MMICs for 77-Ghz Automotive Radar
… and synthesizes models for a variety of coplanar passive components. All of the models are verified with comparisons to measured data through W-band. This work then presents measured and simulated performance characteristics of the MMICs. A three-stage amplifier exhibits 8 dB of gain, and each …
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Generalized Frequency Plane Model of Integrated Electromagnetic Power Passives
… for integration of electromagnetic power passives. This integration will enable the incorporation of resonant circuits, transformers, EMI filters and the like into the integrated power electronics modules. These integrated electromagnetic power passives have been realized in terms of …
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Integration of Filter Elements in Electric Drives
… Rotor inertia is used to displace electrical passive components and thereby reduce the filter requirements of the dc-link capacitor. This is shown in permanent magnet synchronous machine drive simulation.
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Passive Balancing of Switching Transients between Paralleled SiC MOSFETs
… to be avoided in perspective of cost and volume. Passive balancing solutions are investigated in this dissertation. The inductors and resistors most effective in improving current sharing are identified by parametric analysis. Their current balancing mechanisms are analyzed in circuit point of …
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Microwave CMOS VCOs and Front-Ends - using integrated passives on-chip and on-carrier
… wave applications. The low quality factor (Q) of passive components on-chip usually limits the high frequency performance. For inductors realized in a standard CMOS process the substrate coupling results in a degraded Q. The quality factor can, however, be improved by moving the passive components …
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