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Filtering by: Creator Mitchell, J. C. Remove constraint Creator: Mitchell, J. C. Degree Field Electrical and Computer Engineering Remove constraint Degree Field: Electrical and Computer Engineering Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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  • Design considerations for fast-settling operational amplifiers

    Creator:
    Yang, Howard C.
    Abstract:
    The design considerations for fast-settling operational amplifiers (opamps) differ significantly between sampled-data switchedcapacitor (SC) and conventional continuous-time applications. In SC circuits, the shape of the output voltage waveform of an opamp is of no consequence provided that the output settles to within a specified tolerance of its steady-state value prior...
    Resource Type:
    Dissertation
    Full Text:
    amplifiers AN ABSTRACT OF THE THESIS OF Howard C. Yang for the degree of Doctor of Philosophy in

  • A P-well GaAs MESFET technology

    Creator:
    Canfield, Philip C.
    Abstract:
    The semiconductor gallium arsenide (GaAs) has many potential advantages over the more widely used semiconductor silicon (Si). These include higher low field mobility, semi-insulating substrates, a direct band-gap, and greater radiation hardness. All these advantages offer distinct opportunities for implementation of new circuit functions or extension of the operating conditions...
    Resource Type:
    Dissertation
    Full Text:
    THESIS OF Philip C. Canfield for the degree of Doctor of Philosophy in Electrical and Computer

  • Hybrid computer simulation of wind-driven ocean currents

    Creator:
    Vithayathil, Francis Joseph
    Abstract:
    A simulation method using a hybrid computer is developed in this dissertation to enhance the study of wind-driven ocean circulation. The simulation is based on the mathematical model developed by Ekman. Pure digital simulation is not economical due to excessive computer time required for the solution of the partial differential...
    Resource Type:
    Dissertation
    Full Text:
    OCEAN CURRENTS Abstract approved: Redacted for privacy Associate Professor Gerald/C. Alexander A

  • Liquid crystal thermography : a new system for breast cancer detection

    Creator:
    Bichara, Kamal Fouad
    Abstract:
    A liquid crystal thermographic technique was developed for application to several problems in clinical medicine and physiology. The procedure was inexpensive, rapid, simple, versatile and acceptable to patients. Investigators in the past have used cholesteric liquid crystals for thermography but their use was limited to research in the medical field...
    Resource Type:
    Dissertation
    Full Text:
    Dr. C. C. Chang A liquid crystal thermographic technique was devel- oped for application to several

  • Sensor Interface Circuit Design towards CMOS Scaling

    Creator:
    Liu, Jialin
    Abstract:
    Sensor system plays an important role in connecting everything including human body to the electrical information systems that we have built and that we are going to build, to make the world more intelligent and efficient. One of the key propulsive forces behind these emerging techniques is CMOS scaling that...
    Resource Type:
    Dissertation
    Full Text:
    : ______________________________________________________ David J. Allstot Sensor system plays an important role in connecting everything

  • A 90.5dB DR 1MHz BW Hybrid Two Step ADC with CT Incremental and SAR ADCs

    Creator:
    Wang, Yanchao
    Abstract:
    The sensors in real time data processing IoT devices require high resolution and sub-MHz data converters, usually implemented as Incremental ADCs due to the advantages of oversampling technique and low latency. In discrete time incremental (IDT) ADCs, the sampling switch non-linearity, charge injection degrade the resolution, and power hungry OPAMPs...
    Resource Type:
    Dissertation

  • Switch-capacitor Power Amplifier with Enhanced Power Back-off Efficiency and Linearity

    Creator:
    Qiao, Bo
    Abstract:
    Nowadays, wireless communication systems use high-order quadrature amplitude modulation (QAM) together with orthogonal frequency-division multiplexing (OFDM) to increase the link capacity and robustness. These signals always have large peak-to-average power ratio (PAPR) and require power amplifiers (PAs) achieve both high efficiency and linearity simultaneously. For the efficiency, the complementary metal...
    Resource Type:
    Dissertation
    Full Text:
    Abstract approved: ______________________________________________________ David J. Allstot

  • A computer simulation model of land use dynamics in the State of Oregon

    Creator:
    Calligan, C. C.
    Abstract:
    The dynamics of land use in the State of Oregon are simulated on a digital computer. The introductory chapter outlines the complex nature of the problems facing the post-industrial society and argues that the scientific and professional estates share in the responsibility for public policy formulation. The second chapter .presents...
    Resource Type:
    Dissertation
    Full Text:
    simulations of socio-economic systems; land use policy in Oregon; interdisciplinary research. (C

  • Detection and diagnosis of parameters change in linear system using time-frequency transformation

    Creator:
    Park, Dae-hyun
    Abstract:
    A systematic optimization of the Cohen class time-frequency transformation for detecting the parameters change is developed. The local moments approach to change detection is proposed and a general formula for the local moments is derived. The optimal kernel functions of the time-frequency transformation are determined based on the combined criteria...
    Resource Type:
    Dissertation
    Full Text:
    continuously differentiable at zero we have: 26 fe-ju°h(c) dco clt = 2n (-j)n h(n)(T) IT =0, (3-14) --0,0

  • Low-power high-resolution delta-sigma ADC design techniques

    Creator:
    Wang, Tao
    Abstract:
    This dissertation presents a low-power high-resolution delta-sigma ADC. Two new architectural design techniques are proposed to reduce the power dissipation of the ADC. Compared to the conventional active adder, the direct charge transfer (DCT) adder greatly saves power by keeping the feedback factor of the active adder unity. However, the...
    Resource Type:
    Dissertation
    Full Text:
    Measurement and Information Systems, 2005. [1-5] J. Robert, G. C. Temes, V. Valencic, R. Dessoulavy and P