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Filtering by: Creator Chaffin, B. C. Remove constraint Creator: Chaffin, B. C. Degree Field Electrical and Computer Engineering Remove constraint Degree Field: Electrical and Computer Engineering Degree Level Master's Remove constraint Degree Level: Master's Rights Statement In Copyright Remove constraint Rights Statement: In Copyright

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  • A DC-DC converter architecture for low-power, high-resistance thermoelectric generators for use in body-powered designs

    Creator:
    Miller, Brian A.
    Abstract:
    This thesis presents a low power DC-DC converter suitable for harvesting energy from high impedance thermoelectric generators (TEGs) for the use in body powered electronics. The chip has been fabricated in a 130nm CMOS technology. To meet the power demands of body powered networks, a novel dual-path architecture capable of...
    Resource Type:
    Masters Thesis
    Full Text:
    . 4(b) and Fig. 4(c) shows the converter operating in the secondary mode. DriveN DriveP

  • Foreground signature extraction for a non-linear hyperspectral mixing model

    Creator:
    Hollis, Jarrod
    Abstract:
    Hyperspectral images consist of intensity measurements associated with a large number of EM wavelengths per pixel. When a pixel contains a single material, the measurements of the pixel match the spectral signature of the material. When multiple materials are present in a single pixel, spectral mixing occurs, and signatures of...
    Resource Type:
    Masters Thesis
    Full Text:
    within a single pixel, the measurement is a mixture of several signatures. 2 (a) (b) (c) (d) (e) (f

  • A Multiresolution Analysis of Temporal Logic

    Creator:
    Pelphrey, Richard E.
    Abstract:
    Is it possible to determine whether a signal violates a formula in Signal Temporal Logic (STL), if the monitor only has access to a low-resolution version of the signal? We answer this question affirmatively by demonstrating that temporal logic has a multiresolution structure, which parallels the multiresolution structure of signals....
    Resource Type:
    Masters Thesis
    Full Text:
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 B Proof of Lemma 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 C Proof of

  • Atomic layer deposition of nanolaminate high-κ gate dielectrics for amorphous-oxide semiconductor thin film transistors

    Creator:
    Triska, Joshua B.
    Abstract:
    Nanolaminate dielectrics combine two or more insulating materials in a many-layered film. These structures can be made to significantly outperform films composed of a single one of their constituent materials by adjusting the composition ratio, arrangement, and size of the component layers. In this work, atomic layer deposition (ALD) is...
    Resource Type:
    Masters Thesis
    Full Text:
    .................................................................................................... 38  22. Leakage current density as a function of ZrO2 content at (a) 1 MV/cm, (b) 2 MV/cm, (c) 3 MV

  • Design techniques for high efficiency high current LED drivers

    Creator:
    Rao, Sachin B.
    Abstract:
    Solid-state based lighting offers a number of advantages such as long life, high efficiency and compactness compared to a conventional halogen tube based lighting. Due to these advantages they are being increasingly used in a variety of lighting applications including portable devices, home, and automotive lighting. Consequently, there has been...
    Resource Type:
    Masters Thesis
    Full Text:
    configuration in different modes: (a) Buck mode. (b) Boost mode. (c) Buck-Boost mode

  • A MOSCAP pipeline pseudo passive DAC

    Creator:
    Behera, Prachee Shree
    Abstract:
    The design of a 10-bit pipelined charge redistribution DAC employing MOSCAPs biased in their accumulation mode is presented in this thesis. A switched capacitor filter and output buffer have also been designed for the system. The effect of MOSCAP nonlinearity on the performance of the pipelined charge redistribution DAC has...
    Resource Type:
    Masters Thesis
    Full Text:
    representations and frequency spectrums of (a) input bit stream, X, (b) output of the Q-DAC, Q and (c) output of

  • Low-voltage switched-capacitor circuits

    Creator:
    Bidari, Emad
    Abstract:
    In recent years, the rapidly growth of CMOS technology has evolved towards submicron and deep-submicron features. Due to smaller device sizes, and significant demand for low-power designs, the maximum allowable power supply voltage is restricted. So far, two solutions; clock boosting and switched opamp schemes have been proposed. The material...
    Resource Type:
    Masters Thesis
    Full Text:
    ; (b) clock; (c) output voltage; (d) output voltage on an expanded time scale 9 2.5 Op-amp

  • 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:
    input to the DAC; (b) Spectra of y, the output of the DAC; (c) Spectra of vm, the output of the overall

  • A new and improved control of a power electronic converter for stabilizing a variable speed generation system using an embedded microcontroller

    Creator:
    Venkatswamy, Suresh
    Abstract:
    A new and improved stabilizer was developed for the variable speed generation (VSG) system. The VSG system exhibits periodic oscillations which sometimes leads to a loss of synchronism. After careful study, a simple but effective strategy to stabilize the system was implemented with real time digital feedback control. The VSG...
    Resource Type:
    Masters Thesis
    Full Text:
    hardware timers (b) Real time digital band pass filter for the RPM signal (c) Interrupt driven control

  • Low-power high-linearity digital-to-analog converters

    Creator:
    Kuo, Ming-Hung
    Abstract:
    In this thesis work, a design of 14-bit, 20MS/s segmented digital-to-analog converter (DAC) is presented. The segmented DAC uses switched-capacitor configuration to implement 8 (LSB) + 6 (MSB) segmented architecture to achieve high performance for minimum area. The implemented LSB DAC is based on quasi-passive pipelined DAC that has been...
    Resource Type:
    Masters Thesis
    Full Text:
    C. Temes In this thesis work, a design of 14-bit, 20MS/s segmented digital-to-analog