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Creator | Title | Description | Subject | Date |
| 1 |
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Khan, Faisal Habib | Multilevel modular capacitor clamped DC-DC converter | A novel topology of multilevel modular capacitor clamped dc-dc converter (MMCCC) will be presented in this paper. In contrast to the conventional flying capacitor multilevel dc-dc converter (FCMDC), this new topology is completely modular and requires a simpler gate drive circuit. Moreover, the new ... | Capacitor-clamped converter; DC-DC converter; MMCCC; Multilevel modular capacitor | 2006-12 |
| 2 |
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Stringfellow, Gerald B. | Step structure and ordering in GaInP | Presents information from an experiment on the step structure and ordering in GalnP. Information on the step spacing and degree of order in the epitaxial layers; Details on the experiment; Results from the experiment. | Physics; Ordering; Steps | 1998 |
| 3 |
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Stringfellow, Gerald B. | Step structure and ordering in Te-doped GaInP | The step structure and CuPt ordering in GaInP layers grown by organometallic vapor phase epitaxy on singular GaAs substrates have been investigated as a function of Te (DETe) doping using atomic force microscopy, and electrical and optical properties measurements. The degree of order decreases for T... | Surfaces; Te doping; Bandgap energy | 1998 |
| 4 |
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Stringfellow, Gerald B. | Step structure and ordering in Zn-doped GaInP | Presents the results of a study of Zinc dopant effects on both step structure and ordering in GaInP in an effort to further clarify the disordering mechanism. Comparison of the results obtained for Zinc with those reported for tellurium; Experiment; Results; Discussion; Conclusion. | Gallium Compounds; Zinc; Ordering | 1999 |
| 5 |
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Blair, Steven | Optical antenna design for fluorescence enhancement in the ultraviolet | Through rational design, we compare the performance of three plasmonic antenna structures for UV fluorescence enhancement. Among the antenna performance metrics considered are the local increase in excitation intensity and the increase in quantum efficiency, the product of which represents the net f... | | 2012-01-01 |
| 6 |
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Stringfellow, Gerald B. | Effects of surfactants Sb and Bi on the incorporation of zinc and carbon in III/V materials grown by organometallic vapor-phase epitaxy | The incorporation of both dopants and background impurities during the organometallic vapor phase epitaxial _x0002_OMVPE_x0003_ growth of GaAs, GaInP, and GaP has been significantly altered by the use of the surfactants Sb and Bi. Sb and Bi are isoelectronic with the group V host elements, and so ... | Physical and chemical processes; Surfactants isoelectronic; Electrochemical C-V profilometry | 2006 |
| 7 |
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Harrison, Reid R. | Mobile robot navigation in enclosed large-scale space | In a large-scale s ace, navigation may occur among very dispersed landmarks, further apart than the range of sensing of an autonomous vehicle. In this work we investigate the feasibility of construction of a landmark-based cognitive map, whose elements are the obstacles perceived by a robotic vehicl... | | 1994-01-01 |
| 8 |
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Furse, Cynthia M. | Invisible fray: a critical analysis of the use of reflectometry for fray location | Significant international research and development efforts have been devoted to methods and equipment for locating wiring faults, particularly those on aging aircraft. Several reflectometry methods that send high frequency signals down the line and analyze the returned reflections have risen to the... | Reflectometry; Fray location; Invisible fray; Fault location; Aging wiring; Spread spectrum reflectometry | 2006-06 |
| 9 |
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Khan, Faisal Habib | Switching cells and their implications for power electronic circuits | This paper will introduce two basic switching cells, P-cell and N-cell, along with their implications and applications in power electronic circuits. The concept of switching cells in power electronic circuits started in the late 1970's. The basic cells presented in this paper have one switching ele... | | 2009-05 |
| 10 |
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Stringfellow, Gerald B. | Fundamentals of vapor phase epitaxial growth processes | The first success with the growth of semiconductor materials by vapor phase epitaxy (VPE) dates back to the 1950's. Today, it is the largest volume technique for the production of both Si and HI/V electronic and photonic devices. Of course, commercial processes for the growth of Si layers, dielectri... | Vapor phase epitaxy; Surfactants | 2007 |
| 11 |
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Stringfellow, Gerald B. | Surface photoabsorption transients and ordering in GaInP | Heterostructures and quantum wells can be produced in GaInP without changing the solid composition by simply varying the order parameter. Since CuPt ordering reduces the band-gap energy, changes in the order parameter induced by changes in growth conditions result in heterostructures with band-ga... | Order parameters; Quantum wells; P-dimers | 1998-03-15 |
| 12 |
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Khan, Faisal Habib | Hybrid electric vehicle power management solutions based on isolated and nonisolated configurations of multilevel modular capacitor-clamped converter | Abstract-This paper presents the various configurations of a multilevel modular capacitor-clamped converter (MMCCC), and it reveals many useful and new formations of the original MMCCC for transferring power in either an isolated or nonisolated manner. The various features of the original MMCCC circ... | | 2009 |
| 13 |
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Harrison, Reid R. | Floating-gate PFET-based CMOS programmable analog memory cell array | The complexity of analog VLSI systems is often limited by the number of pins on a chip rather than by the die area. Currently, many analog parameters and biases are stored off chip. Moving parameter storage on chip could save pins and allow us to create complex programmable analog systems. In this ... | | 2000-01-01 |
| 14 |
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Mastrangelo, Carlos H. | Precision curved micro hemispherical resonator shells fabricated by poached-egg micro-molding | This paper presents a new technique for the fabrication of high resolution non-planar precision microshells for hemispherical resonating gyros via a poached-egg micromolding (PEM) method. In PEM, precision ball lenses are used as starting molds. Hemispherical shells are formed on the lenses using fi... | | 2012-01-01 |
| 15 |
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Khan, Faisal Habib | Maximum power point tracking of stirling generator and ocean wave energy conversion systems using a two-stage power converter | Wave energy has become one of the most promising renewable energy resources nowadays. By using a linear generator/alternator, the periodic piston motion of the wave energy conversion system (WEC) can be converted to AC voltage with variable RMS amplitude and frequency; this process is comparable to ... | | 2013-01-01 |
| 16 |
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Harrison, Reid R. | MDAC synapse for analog neural networks | Efficient weight storage and multiplication are important design challenges which must be addressed in analog neural network implementations. Many schemes which treat storage and multiplication separately have been previously reported for implementation of synapses. We present a novel synapse c... | Multiplying digital-to-analog converter; MDAC synapse; Analog neural networks | 2004-01-01 |
| 17 |
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Khan, Faisal Habib | Generating isolated outputs in a multilevel modular capacitor clamped DC-DC converter (MMCCC) for hybrid electric and fuel cell vehicles | This paper presents a new technique to obtain isolated dc voltage outputs from a capacitor clamped dc-dc converter. The multilevel modular capacitor clamped converter (MMCCC) has several key features that make it possible to generate ac outputs (10 kHz) from a dc-dc converter circuit. Using those h... | | 2008-01-01 |
| 18 |
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Harrison, Reid R. | Versatile integrated circuit for the acquisition of biopotentials | Electrically active cells in the body produce a wide variety of voltage signals that are useful for medical diagnosis and scientific investigation. These biopotentials span a wide range of amplitudes and frequencies. We have developed a versatile front-end integrated circuit that can be used to amp... | Biopotential; Neural recording; Electrodes; Amplifier | 2007-09 |
| 19 |
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Khan, Faisal Habib | Multiple load-source integration in a multilevel modular capacitor clamped DC-DC converter featuring fault tolerant capability | Abstract-A multilevel modular capacitor clamped dc-dc converter (MMCCC) will be presented in this paper with some of its advantageous features. By virtue of the modular nature of the converter, it is possible to integrate multiple loads and sources to the converter at the same time. The modular con... | | 2007 |
| 20 |
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Stevens, Kenneth | Synchronous elasticization: considerations for correct implementation and miniMIPS case study | Latency insensitivity is a promising design paradigm in the nanometer era since it has potential benefits of increased modularity and robustness to variations. Synchronous elasticization is one approach (among others) of transforming an ordinary clocked circuit into a latency insensitive design. Th... | | 2010 |
| 21 |
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Harrison, Reid R. | CMOS programmable analog memory-cell array using floating-gate circuits | The complexity of analog VLSI systems is often limited by the number of pins on a chip rather than by the die area. Currently, many analog parameters and biases are stored off-chip. Moving parameter storage on-chip could save pins and allow us to create complex programmable analog systems. In this ... | Computer chips; VLSI; Computer memory; Potentiometers; CMOS circuits; Floating gate circuit | 2001-01 |
| 22 |
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Khan, Faisal Habib | Fabrication processes and experimental validation of a planar PV power system with monolithically embedded power converters | This paper summarizes the research outcome intended to identify the most suitable device architecture and its implementation for cell-level power conversion in a photovoltaic (PV) system. The fabrication process to accommodate the power conditioning unit with the PV cells using the same process run ... | | 2012-01-01 |
| 23 |
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Furse, Cynthia M. | Challenges with optically transparent patch antennas | In this paper, antennas made out of transparent conducting oxides (TCOs) are explored. The optical transparency of transparent conducting oxides is achieved through thin-film depositions on substrates. However, thin-film depositions create a new set of electrical challenges that require a full under... | | 2012-01-01 |
| 24 |
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Stringfellow, Gerald B. | Electrical properties of nitrogen doped GaP | The electrical properties namely, electron concentration and mobility, have been investigated in the temperature range from 53 to 400 K for undoped and nitrogen-doped VPE GaP. | Electron concentration; Ionization energy; Electron mobility | 1975 |
| 25 |
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Khan, Faisal Habib | Multiple-load-source integration in a multilevel modular capacitor-clamped DC-DC converter featuring fault tolerant capability | A multilevel modular capacitor-clamped dc-dc converter (MMCCC) will be presented in this paper with some of its advantageous features. By virtue of the modular nature of the converter, it is possible to integrate multiple loads and sources with the converter at the same time. The modular construct... | DC-DC power conversion; Power capacitors; Power conversion; Power MOSFETs; Capacitor-clamped converter | 2009-01 |
