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  • Improved design techniques for low-voltage low-power switched-capacitor delta-sigma modulators

    Creator:
    Grilo, Jorge
    Abstract:
    This dissertation investigates the constraints which arise when switched-capacitor (SC) delta-sigma modulators are designed for low-voltage operation, targeting also low power dissipation, and proposes methods of improving the performance and optimizing for low power dissipation. This is accomplished by identifying critical elements whose performance can lead to increased power dissipation,...
    Resource Type:
    Dissertation
    Full Text:
    . Thanks also to my friend Rita Wells ("Red") for her support and jokes. Thanks also to Prof. David

  • Hybrid electric vehicle converter harmonics

    Creator:
    Bowers, Waylon T.
    Abstract:
    Hybrid electric vehicles (HEV’s) are a very important part of today’s transportation system as they are bridging the gap between fully electric vehicles and conventional internal combustion vehicles (ICV’s). They have much higher efficiencies and lower emissions than ICV’s, while still having the ability to travel long range and refuel...
    Resource Type:
    Masters Thesis
    Full Text:
    . David Gobeli for their help. I want to express my appreciation to my fellow graduate students Anthony

  • A study of basic building blocks of analog-to-digital delta-sigma modulators

    Creator:
    Guo, Yuhua
    Abstract:
    In this thesis, a novel Direct-Charge-Transfer (DCT) integrator structure is proposed, which can settle much faster than regular switch-capacitor integrators. A new Spread-Spectrum Dynamic Element Matching (SS-DEM) algorithm is also introduced, which can effectively spread or shape the nonlinearity error of multi-bit DAC in the feedback path, thus improve the...
    Resource Type:
    Masters Thesis
    Full Text:
    to acknowledge Professor David Harold Gobeli and Professor Huaping Liu for taking the time to serve

  • Steel confined yielding damper for earthquake resistant design

    Creator:
    Newell, James D.
    Abstract:
    An experimental study of a passive energy dissipation tension-compression yielding brace or buckling restrained brace has been conducted. The Confined Yielding Damper (CYD) consists of a steel yielding core confined within a tube filled with non-cohesive media. The external tube and confined non-cohesive media provide lateral stability to the core...
    Resource Type:
    Masters Thesis
    Full Text:
    . Thomas Miller, Dr. David Rosowsky, and Dr. David Gobeli. This research was funded by the National

  • The effect of temperature and residence time on the distribution of carbon, sulfur, and nitrogen between gaseous and condensed phase products from low temperature pyrolysis of kraft black liquor

    Creator:
    Phimolmas, Varut
    Abstract:
    Laminar entrained flow reactor (LEFR) was used to determine the effect of temperature and residence time on the distribution of carbon, sulfur and nitrogen between gaseous and condensed phase products from low temperature pyrolysis of kraft black liquor. The operating furnace temperatures were between 400°C-600°C where the effect of condensable...
    Resource Type:
    Masters Thesis
    Full Text:
    research. I give sincere thanks to Dr. Kristiina Iisa and Dr. Christopher Biermann, Dr. David Gobeli who

  • Analysis and modeling of single-ended and differential spiral inductors in silicon-based RFICs

    Creator:
    Watson, Adam C.
    Abstract:
    A new comprehensive wide-band compact modeling methodology for single-ended spiral inductors and differential spiral inductors is presented. The new modeling methodology creates an equivalent circuit model consisting of frequency-independent circuit elements for use in circuit simulators. A fast automated extraction procedure is developed for determining the circuit element values from...
    Resource Type:
    Masters Thesis
    Full Text:
    thanks to Dr. Raghu Settaluri, Dr. Gabor Temes. and Dr. David Gobeli for giving of their time to sit. on

  • The development of productivity interfirm comparison procedures for the cement industry of Saudi Arabia

    Creator:
    Al-Agha, Osama K.
    Abstract:
    Productivity Interfirm Comparison (PIC) is a simple method used to improve productivity at the firm level, where a number of firms operate in the same product line so that performance information on the firms can be compiled and compared. This results in identifying potential areas for improvement or exploitation. The...
    Resource Type:
    Masters Thesis
    Full Text:
    . I also thank all of my committee members, Dr. Robert Safford, Dr. Sabah Ranadawa, Dr. David Gobeli

  • Application of buckling behavior to evaluate and control shape variation in high-temperature microlamination

    Creator:
    Wattanutchariya, Wassanai
    Abstract:
    The miniaturization of energy, chemical and biological systems for distributed and portable applications, known as process intensification, is realized by the enhancement in heat and mass transfer performance within high surface-to-volume ratio microchannels. Fabrication of devices for process intensification is achieved in part by microlamination techniques. These techniques consist of...
    Resource Type:
    Dissertation
    Full Text:
    discussions. The author would like also to thank Dr. David Gobeli, not only for his role in graduate council

  • A voice : lived experiences of selected African American community college trustees

    Creator:
    Hendrix, George A.
    Abstract:
    The focus of this study is a search for the voice of African American community college trustees as they work to impact the changes community colleges must make over the next quarter century. It examined the lived experiences and perceptions that selected African American community college trustees have of their...
    Resource Type:
    Dissertation
    Full Text:
    the members of my committee, Sam Stern, Mildred 011ee, Calvin Henry, and David Gobeli. Your patience