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Filtering by: Alternative title ssim EC 815 Remove constraint Alternative title ssim: EC 815 Degree Field Electrical and Computer Engineering Remove constraint Degree Field: Electrical and Computer Engineering Peer Reviewed No Remove constraint Peer Reviewed: No

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  • Grating-tuned external cavity diode lasers

    Creator:
    Falconer, Beate Stephan
    Abstract:
    Diode lasers have many advantages such as small size, high efficiency and small angular dispersion of the collimated beam. However they also have some problems like lack of frequency stability. They can not be tuned in wavelength. An external cavity can solve these problems and decrease the laser linewidth. To...
    Resource Type:
    Masters Thesis
    Full Text:
    Table 4.4.1.1.: Bandwidths of LD 12, EC 12, LD 12c and EC 12c. 52 Table 4.4.1.2.: Tuning ranges of LD

  • A study of deep levels of AlGaAs/GaAs heterojunction bipolar transistors

    Creator:
    Huang, Chun-ta
    Abstract:
    A study of deep levels of the emitter region of a heterojunction bipolar transistor is investigated using deep level transient spectroscopy (DLTS), deep level admittance spectroscopy (DLAS), thermally stimulated capacitance (TSCAP), and capacitance-voltage (C-V) profiling. The DX center, with an activation energy of 0.45 eV, is the only deep level...
    Resource Type:
    Masters Thesis
    Full Text:
    event. This investigation is limited to the trapping event. 3 (a) (b) (c) (d) Ec Et 0 Ev

  • Investigation of ultra-thin In-Ga-Zn-O thin-film transistors

    Creator:
    Chiang, Tsung-Han
    Abstract:
    The objective of the work reported herein is to explore the impact of decreasing channel thickness on radio-frequency (RF) sputtered amorphous indium-gallium-zinc oxide (a-IGZO) thin-film transistors (TFTs) electrical performance through the evaluation of drain current versus gate voltage (I[subscript D] − V[subscript G]) transfer curves. For a fixed set of...
    Resource Type:
    Masters Thesis
    Full Text:
    the physisorbed O2 and free electron capture from the conduction band, Ec, results in a chemisorbed

  • A study of the effects of oxide traps on the characteristics of indium phosphide MISFET's

    Creator:
    Prasad, S. Jayasimha
    Resource Type:
    Dissertation
    Full Text:
    capture cross-section Ec energy of the conduction band edge Eco energy of the conduction band edge at

  • A comparison and assessment of hybrid filter topologies and control algorithms

    Creator:
    Chen, Lijun
    Abstract:
    The harmonic problem in power systems is gaining more attention as incidences correlated with harmonics increase. Conventional passive filtering techniques for harmonic mitigation have inherent problems, and purely active filters have the disadvantages of higher costs and ratings. Hybrid active filters inherit the efficiency of passive filters and the improved...
    Resource Type:
    Masters Thesis
    Full Text:
    shown in Figure 2.1. With ea,eb,ec c distortion, the extracted harmonic signal no longer contains a 5th

  • Fabrication process assessment and negative bias illumination stress study of IGZO and ZTO TFTs

    Creator:
    Hoshino, Ken
    Abstract:
    Indium-gallium-zinc oxide (IGZO) and zinc-tin oxide (ZTO) are investigated for thin-film transistor (TFT) applications. Negative bias illumination stress (NBIS) is employed for electrical stability assessment. Unpassivated IGZO and ZTO TFTs suffer from severe NBIS instabilities. Zinc-tin-silicon oxide is found to be an effective passivation layer for IGZO and ZTO TFTs,...
    Resource Type:
    Dissertation
    Full Text:
    polycrystalline ZnO. EC, EV, and EF are the conduction band minimum, the valence band maximum, and the Fermi

  • Channel estimation and data detection for mobile MIMO OFDM systems

    Creator:
    Gao, Jie
    Abstract:
    Designing spectral efficient, high-speed wireless links that offer high quality- of-service and range capability has been a critical research and engineering challenge. In this thesis, we mainly address the complexity and performance issues of channel estimation and data detection in multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems over...
    Resource Type:
    Dissertation
    Full Text:
    25 30 35 40 SNR(dB) A ve ra ge ( or e rg od ic ) C ap ac ity (b its /s ec /H z

  • Efficient power conversion interface circuits for energy harvesting applications

    Creator:
    Le, Triet T.
    Abstract:
    Harvesting energy from the environment for powering micro-power devices have been increasing in popularity. These types of devices can be used in embedded applications or in sensor networks where battery replacement is impractical. In this dissertation, different methods of energy harvesting from the environment are explored as alternative sources of...
    Resource Type:
    Dissertation
    Full Text:
    Free Space Distance (meter) R ec ei ve d P o w er ( d B m ) 450 μW 113 μW 28.1 μW

  • An Anthology of Next-Generation WSNs and Transformative IoT Use-Cases

    Creator:
    Williams, Jennifer M.
    Abstract:
    The Internet of Things (IoT) paradigm brought an ever-increasing dependence on low-power devices to collect sensor data and transmit that information to the cloud, placing greater demand on connectivity and lifespan. In response, rapid worldwide innovation demonstrates the trade-offs in processing, communication, and energy consumption with diverse approaches to low-power...
    Resource Type:
    Dissertation

  • Identification of stochastic systems with random parameters with particular reference to the recirculating lymphocytes in the immune system

    Creator:
    Farooqi, Zarreen H. H.
    Abstract:
    This thesis is composed of four parts: i) system description, ii) model development, iii) parameter estimation, and iv) validation. The natural system used here is an aspect of the immune system, namely, the distribution of recirculating lymphocytes in various organs throughout the body. This distribution gains importance because: i) it...
    Resource Type:
    Dissertation