Index Catalog // ScholarsArchive@OSU

Multithreaded virtual processor on DSM

Creator:: An, Ho Seok
Abstract:: Modern superscalar processors exploit instruction-level parallelism (ILP) by issuing multiple instructions in a single cycle because of increasing demand for higher performance in computing. However, stalls due to cache misses severely degrade the performance by disturbing the exploitation of ILP. Multiprocessors also greatly exacerbate the memory latency problem. In SMPs,...
Resource Type:: Masters Thesis

Architectural support for multithreading on a 4-way multiprocessor

Creator:: Kim, Gwang-Myung
Abstract:: The microprocessors will have more than a billion logic transistors on a single chip in the near future. Several alternatives have been suggested for obtaining highest performance with billion-transistor chips. To achieve the highest performance possible, an on-chip multiprocessor will become one promising alternative to the current superscalar microprocessor. It...
Resource Type:: Masters Thesis

A simulation and architectural study of TCP/IP

Creator:: Becker, Bridget A.
Abstract:: This paper discusses current network technologies and protocols and presents a simulation study of the most common networking protocol used today, TCP/IP. The TCP/IP protocol stack has many inherent problems that will be shown through this simulation study. Using the SimpleScalar Toolset, the significance of the data copying and checksumming...
Resource Type:: Masters Thesis

Power estimation of superscalar microprocessor using VHDL model

Creator:: Zhang, Wanpeng
Abstract:: Power optimization becomes more and more important due to the design cost and reliability. Sometimes high power consumption means expensive package cost and low reliability. The first step in optimizing power consumption is determining where power is consumed within a processor. While system-level code tracing and bit transition calculation are...
Resource Type:: Masters Thesis

Low power, high performance pseudo-static D flip-flop

Creator:: Low, Tim D.
Abstract:: Digital systems, in particular microprocessor, have recently experienced phenomena growth in performance. Both technology advancement and clever design have sustained this performance growth. As clock frequency heads into the Ghz range, new circuit design, for both logic and storage, are needed. Such new circuit technology must provide needed performance with...
Resource Type:: Masters Thesis

Low frequency noise and the upconverted phase noise effects in NMOSFET circuits

Creator:: Xie, Dingming
Resource Type:: Masters Thesis

Content-based color image retrieval

Creator:: Varanguien de Villepin, Audrey
Abstract:: A fully automated method for content-based color image retrieval is developed to extract color and shape content of an image. A color segmentation algorithm based on the k-mean clustering algorithm is used and a saturated distance is proposed to discriminate between two color points in the HSV color space. The...
Resource Type:: Masters Thesis

Motion-based MPEG video summarization

Creator:: Colle, Olivier
Abstract:: A new, fully automated summarization algorithm of MPEG compressed videos is designed to address the challenge of content based video retrieval. This algorithm segments the MPEG stream motion vector magnitudes using a seed growing region technique. Following the spatial segmentation of each frame, an intra-frame class-merging operation is performed. The...
Resource Type:: Masters Thesis

Electro-optical characterization of SrS:Ce, SrS:Cu, and SrS:Cu,Ag alternating-current thin-film electroluminescent devices

Creator:: Grudzinsky, Arkady S.
Abstract:: The purpose of this thesis is to contribute to the understanding of SrS-based alternating-current thin-film electroluminescent (ACTFEL) device operation. Three main accomplishments serving this purpose are presented in this thesis. First, two new methods are developed for estimation of insulator capacitance in ACTFEL devices possessing a large amount of dynamic...
Resource Type:: Masters Thesis

A simple RLS-POCS solution for reduced complexity ADSL impulse shortening

Creator:: Helms, Sheldon J.
Abstract:: Recently, with the realization of the World Wide Web, the tremendous need for high-speed data communications has grown. Several access techniques have been proposed which utilize the existing copper twisted pair cabling. Of these, the xDSL family, particularly ADSL and VDSL, have shown great promise in providing broadband or near-broadband...
Resource Type:: Masters Thesis

Analysis of planar multi-conductor multilayered structures by network analog method

Creator:: McVeety, Joseph J.
Abstract:: In this thesis the network analog method is used to analyze various planar multi-conductor structures in multilayered, lossy dielectric media. The method is based on an efficient impedance network representation of the finite difference approximation of Laplace's equation for the electric potential. Using the network analog method, the transmission line...
Resource Type:: Masters Thesis

Fabrication and characterization of ACTFEL devices

Creator:: Keir, Paul D.
Abstract:: The goal of this thesis is the identification and synthesis of high-luminance, primary color alternating-current thin-film electroluminescent (ACTFEL) devices. Special attention is paid to the synthesis of primary color green ACTFEL devices because of the lack of an adequate primary green ACTFEL phosphor and the dominance of green wavelengths in...
Resource Type:: Dissertation

Power quality simulator for commercial office buildings

Creator:: Atluri, Prabha Krishna
Abstract:: The distortions of input voltage and current waveforms generated by switch mode power supply (SMPS) operation are a major cause of concern in the power quality performance of commercial office buildings. These distortions are usually evaluated by performing a site survey of the building. In this thesis, a power quality...
Resource Type:: Masters Thesis

ACTFEL device simulation with impact ionization using a two-sheet charge model

Creator:: Bouchard, Anthony F.
Abstract:: The main achievement of this thesis is the development of a two-sheet charge simulation model with space charge creation by trap-to-band impact ionization to describe the electrical characteristics of alternating-current thin-film electroluminescent (ACTFEL) devices. The two-sheet charge model localizes all of the space charge in the phosphor region of an...
Resource Type:: Masters Thesis

Passively controlled variable-speed generator system

Creator:: Bathon, Tobias Siegfried
Abstract:: This thesis presents both an analysis and simulations of a passively controlled variable-speed generator system, which can be applied for renewable energy sources such as wind turbines. Parallel connected passive/external resistors and inductors are connected to the slip rings of a wound rotor induction machine to provide an acceptable speed...
Resource Type:: Masters Thesis

Low-voltage pipeline A/D converter

Creator:: Wu, Lei
Abstract:: Continuous process scale-down and emerging markets for low-power/low-voltage mobile systems call for low-voltage analog integrated circuits. Switched-capacitor (SC) circuits are the building blocks for analog signal processing and will encounter severe overdrive problems when operating at low voltage conditions. There exist three techniques to solve the problem, but with their...
Resource Type:: Masters Thesis

Characterization of organic light-emitting devices

Creator:: Norris, Benjamin J.
Abstract:: In this thesis steady-state (i.e. steady-state with respect to the applied voltage waveform) transient current-transient voltage [i(t)-v(t)], transient brightness-transient current [b(t)-i(t)], transient brightness-transient voltage [b(t)-v(t)], transient current [i(t)], transient brightness [b(t)], and detrapped charge analysis are introduced as novel organic light emitting device (OLED) characterization methods. These analysis methods involve...
Resource Type:: Masters Thesis

The architecture of VIS multimedia extension

Creator:: Kwon, Young-Kyong
Abstract:: In the past, multimedia technology focused mainly on designing high quality audio and graphical imagery as well as providing adequate performance levels that the users demand for multimedia applications. However, the concept of multimedia has expanded into New-Media that involves variety use of multimedia data in consumer-oriented applications, such as...
Resource Type:: Masters Thesis

Optimum equalization and synchronization of broadband multicarrier systems

Creator:: Lashkarian, Navid
Abstract:: The application of information theory and digital signal processing techniques to digital communication has resulted in robust methods for reliable high speed data transmission over noisy channels environments. Among these methods, multicarrier systems have become a viable solution for exploiting maximum spectral efficiency over both wideband highly dispersive static and...
Resource Type:: Dissertation

Bilinear system model of the action potential of a single neuron

Creator:: Yahiaoui, Youcef
Abstract:: Neurons are characterized by an electric potential which is established between their inside and outside media. They exhibit specific voltage fluctuations, in response to strong enough current impulses, called action potentials. In this work, a bang-bang controlled bilinear system (BLS) is derived to approximate the generation of a simple neuron's...
Resource Type:: Masters Thesis

Characterization of coupled microstrip structure using FDTD

Creator:: Kim, Yoonsuk
Abstract:: A new CAD-oriented methodology for the full-wave broadband characterization of coupled microstrip structures for RF/microwave and high-speed digital circuits is presented. The characterization methodology is based on the finite difference time domain (FDTD) technique combined with a systematic extraction procedure using the normal mode approach and multiport network concepts. The...
Resource Type:: Dissertation

Data rate improvements for the IEEE 802.11 wireless local area network standard through the use of code division multiple access and turbo coding

Creator:: Buck, David H.
Abstract:: The widespread use of Wireless Local Area Networks (WLAN) and the desire for such products from different vendors to operate together has generated a movement towards standardization. Over the last decade, several organizations worldwide have researched and developed such standards, this includes the IEEE 802.11 committee. One of the important...
Resource Type:: Masters Thesis

Voltage analysis of PWM inverter fed induction motors

Creator:: Al-Ghubari, Fahad H.
Abstract:: Adjustable Speed Drive (ASD) systems are widely used in industry to effectively improve process efficiency and control. Typically, an ASD system consists of a motor with its speed controlled by a power electronics converter via varying the amplitude and frequency of the input voltage. However, several abnormal insulation failures of...
Resource Type:: Masters Thesis

Efficient decision feedback receiver design for cellular CDMA spread spectrum communications

Creator:: Volz, Patrick U.
Abstract:: This dissertation presents the continued study of a non-iterative decision feedback (DF) receiver/decoder design and its application to cellular communications or wireless local loop systems based on the IS-95(-A) standard of the Telecommunications Industry Association and also Personal Communications Services systems based on the American National Standards Institute standard J-STD-...
Resource Type:: Dissertation

Electro-optic characterization of SrS-based alternating current thin-film electroluminescent devices

Creator:: Nevers, Corey A.
Abstract:: Two methods of electro-optically characterizing alternating-current thin-film electroluminescent (ACTFEL) devices are investigated: photo-induced transferred charge (PIQ) and luminescence (PIL), and subthreshold voltage-induced transferred charge (VIQ) techniques. Both techniques provide information related to traps within the phosphor layer. PIQ/PIL experiments monitor the transport of electrons and holes across the phosphor layer...
Resource Type:: Masters Thesis

Modeling and characterization of multiple coupled lines

Creator:: Tripathi, Alok
Abstract:: A configuration-oriented circuit model for multiple coupled lines in an inhomogeneous medium is developed and presented in this thesis. This circuit model consists of a network of uncoupled transmission lines and is readily modeled with simulation tools like LIBRA© and SPICE©. It provides an equivalent circuit representation which is simple...
Resource Type:: Dissertation

Time domain modeling of electromagnetic radiation with application to ultrafast electronic and wireless communication

Creator:: Remley, Catherine A.
Abstract:: A versatile computational technique for improved time domain modeling of electromagnetic radiative systems is demonstrated. Two computational methods are combined: the finite-difference time domain (FDTD) method, a full-wave electromagnetic field solver, and the Kirchhoff surface integral formulation, a spatial transformation technique. The combined FDTD/Kirchhoff technique is shown to increase accuracy...
Resource Type:: Dissertation

Low power high resolution data converter in digital CMOS technology

Creator:: Zheng, Zhiliang
Abstract:: The advance of digital IC technology has been very fast, as shown by rapid development of DSP, digital communication and digital VLSI. Within electronic signal processing, analog-to-digital conversion is a key function, which converts the analog signal into digital form for further processing. Recently, low-voltage and low-power have become also...
Resource Type:: Masters Thesis

Master/slave parallel processing

Creator:: Larsen, Steen K.
Abstract:: An 8 bit microcontroller slave unit was designed, constructed, and tested to demonstrate advantages and feasibility of master/slave parallel processing using conventional processors and relatively slow inter-processor communications. An 8 bit ISA bus controlled by an 80X86 is interfaced to a logic block that controls data flow to and from...
Resource Type:: Masters Thesis

Investigation and mitigation of the adverse effects of PWM adjustable speed drives

Creator:: Zhang, Haoran
Abstract:: With the introduction of high speed semiconductor power devices and the increased application of adjustable speed drives (ASDs) for efficient speed control of ac motors, there has been a growing number of costly motor-drive related process failures. It has been found that the high dv/dt and high switching frequency have...
Resource Type:: Dissertation

Voltage sag and momentary interruption ride-through for adjustable speed drives

Creator:: van Zyl, Annabelle
Abstract:: The awareness of electric power quality has increased over the past decade as electronic equipment has become more susceptible to power disturbances. The most disruptive power disturbances are voltage sags and momentary interruptions and their effect on adjustable speed drives (ASDs) is studied in this thesis. Several solutions have been...
Resource Type:: Dissertation

A performance study of multithreading

Creator:: Kwak, Hantak
Abstract:: As the performance gap between processor and memory grows, memory latency will be a major bottleneck in achieving high processor utilization. Multithreading has emerged as one of the most promising and exciting techniques used to tolerate memory latency by exploiting thread-level parallelism. The question however remains as to how effective...
Resource Type:: Dissertation

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

Ultra low voltage DRAM current sense amplifier with body bias techniques

Creator:: Gang, Yung-jin, 1957-
Abstract:: The major limiting factor of DRAM access time is the low transconductance of the MOSFET's which have only limited current drive capability. The bipolar junction transistor(BJT) has a collector current amplification factor, β, times base current and is limited mostly by the willingness to supply this base current. This collector...
Resource Type:: Dissertation

Fast software implementations of block ciphers

Creator:: Sessions, Julian Brently
Abstract:: Three block ciphers are considered to determine how well they can be implemented on existing superscalar architectures such as the Intel Pentium. An examination of the Pentium architecture suggests that substantial performance increases can be achieved if particular rules are followed. Software libraries are written in high-level C language and...
Resource Type:: Masters Thesis

Design and computer aided optimization of a fully integrated CMOS RF distributed amplifier

Creator:: Ballweber, Brian M.
Abstract:: Advancements in the sophistication and complexity of modern electronic systems are creating a need for highly integrated systems with ever higher operational frequencies. The economical demands of these systems dictate that they be implemented using low cost fabrication technologies, such as digital CMOS. One of the major challenges facing circuit...
Resource Type:: Masters Thesis

Alternating-current thin-film electroluminescent device optical excitation experiments

Creator:: Cleary, Bradford A.
Abstract:: This thesis investigates two methods of optical excitation of alternating-current thin-film electroluminescent (ACTFEL) devices. The two experimental methods investigated in this thesis are the photo-induced charge (PIQ) and luminescence (PIL), and the subthreshold-voltage induced transferred charge (VIQ) techniques. PIQ/PIL experiments utilize an above-bandgap laser pulse to investigate the transport properties...
Resource Type:: Masters Thesis

Fast Galois field arithmetic for elliptic curve cryptography and error control codes

Creator:: Sunar, Berk
Abstract:: Today's computer and network communication systems rely on authenticated and secure transmission of information, which requires computationally efficient and low bandwidth cryptographic algorithms. Among these cryptographic algorithms are the elliptic curve cryptosystems which use the arithmetic of finite fields. Furthermore, the fields of characteristic two are preferred since they provide...
Resource Type:: Dissertation

High-accuracy circuits for on-chip capacitor ratio testing and sensor readout

Creator:: Wang, Bo, 1970-
Abstract:: The precise measurement of a capacitance difference or ratio in a digital form is very important for capacitive sensors, for CMOS process characterization as well as for the realization of precise switched-capacitor data converters, amplifiers and other circuits utilizing ratioed capacitors. This thesis introduces design techniques for on-chip capacitor ratio...
Resource Type:: Dissertation

Fast bit-level, word-level and parallel arithmetic in finite fields for elliptic curve cryptosystems

Creator:: Halbutoğulları, Alper
Abstract:: Computer and network security has recently become a popular subject due to the explosive growth of the Internet and the migration of commerce practices to the electronic medium. Thus the authenticity and privacy of the information transmitted and the data stored on networked computers is of utmost importance. The deployment...
Resource Type:: Dissertation

Nonlinear neural control with power systems applications

Creator:: Chen, Dingguo
Abstract:: Extensive studies have been undertaken on the transient stability of large interconnected power systems with flexible ac transmission systems (FACTS) devices installed. Varieties of control methodologies have been proposed to stabilize the postfault system which would otherwise eventually lose stability without a proper control. Generally speaking, regular transient stability is...
Resource Type:: Dissertation

Measurement analysis and efficiency estimation of three phase induction machines using instantaneous electrical quantities

Creator:: Wiedenbrüg, Ernesto J.
Abstract:: Estimating the operating efficiency of an induction machine is of prime importance for modern plant management. An extensive testing program of present efficiency estimation techniques was performed at the Motor Systems Resource Facility (MSRF), during which serious shortcomings of the existing techniques were identified. The objective of the work of...
Resource Type:: Dissertation

Compensation techniques for cascaded delta-sigma A/D converters and high-performance switched-capacitor circuits

Creator:: Sun, Tao
Abstract:: This thesis describes compensation techniques for cascaded delta-sigma A/D converters (ADCs) and high-performance switched-capacitor (SC) circuits. Various correlated-double-sampling (CDS) techniques are presented to reduce the effects of the nonidealities, such as clock feedthrough, charge injection, opamp input-referred noise and offset, and finite opamp gain, in SC circuits. A CDS technique...
Resource Type:: Dissertation

Comparison of DPCM and Subband Codec performance in the presence of burst errors

Creator:: Bhutani, Meeta
Abstract:: This thesis is a preliminary study of the relative performance of the major speech compression techniques, Differential Pulse Code Modulation (DPCM) and Subband Coding (SBC) in the presence of transmission distortion. The combined effect of the channel distortions and the channel codec including error correction is represented by bursts of...
Resource Type:: Masters Thesis

Testing and modeling of the single-phase Written-Pole Motor

Creator:: Chis, Lucian
Abstract:: A relatively new development in the electric machines field has been the written-pole technology, of which the latest product is the large single-phase electric motor, the single phase Written-Pole Motor (WPM). The WPM is a synchronous, permanent-magnet single-phase motor having a weak rotor cage for start-up which in addition exhibits...
Resource Type:: Masters Thesis

Computerised dynamic control of an ac dynamometer

Creator:: Rodrigues, Terence Keith
Abstract:: The Motor Systems Resource Facility (MSRF) at Oregon State University presently conducts a variety of steady state tests on Motors and Generators, with ratings of upto 300Hp.(225kW), using a dynamometer. The dynamometer consists of an induction motor fed by a power electronic converter. A control computer uses a serial link,...
Resource Type:: Masters Thesis

CMOS low noise amplifier design utilizing monolithic transformers

Creator:: Zhou, Jianjun J.
Abstract:: Full integration of CMOS low noise amplifiers (LNA) presents a challenge for low cost CMOS receiver systems. A critical problem faced in the design of an RF CMOS LNA is the inaccurate high-frequency noise model of the MOSFET implemented in circuit simulators such as SPICE. Silicon-based monolithic inductors are another...
Resource Type:: Dissertation

Radiation effects in compound semiconductor heterostructure devices

Creator:: Sarkar, Aveek, 1974-
Abstract:: Radiation studies were performed on compound semiconductor heterostructure devices. The objective was to understand the degradation processes caused by the exposure of these devices to radiation. Preliminary experiments were focussed on studying the degradation phenomenon in single heterojunctions and single quantum wells. It was found that ionizing radiation like gamma...
Resource Type:: Masters Thesis

Model-based solution techniques for the source localization problem in distributed parameter systems

Creator:: Alpay, Mehmet Emin
Abstract:: In this thesis, three model-based methods are presented for finding the location of a point source with possibly time-varying strength for a class of distributed parameter systems. The first method involves off-line numerical computation of the time-response data at the sensor(s) from all possible source locations and functions of source...
Resource Type:: Dissertation

Low-power high-performance 32-bit 0.5[u]m CMOS adder

Creator:: Shah, Parag Shantu
Abstract:: Currently, the two most critical factors of microprocessor design are performance and power. The optimum balance of these two factors is reflected in the speed-power product(SPP). 32-bit CMOS adders are used as representative circuits to investigate a method of reducing the SPP. The purpose of this thesis is to show...
Resource Type:: Masters Thesis

Design and computer-aided optimization of RF CMOS power amplifiers

Creator:: Gupta, Ravi
Abstract:: In recent years, there has been an extensive effort to develop low-cost implementations of radio frequency integrated circuits for consumer applications. This thesis is a research effort in the design and implementation of integrated RF CMOS Power Amplifiers (PAs). A significant challenge in the implementation of RF CMOS ICs is...
Resource Type:: Dissertation

Characterization and reduction of local oscillator phase noise effects in communications systems

Creator:: Godshalk, Edward M.
Abstract:: Recent developments in digital communications at microwave frequencies have revealed that local oscillator phase noise is often a factor in the bit error rate (BER) analysis. Digital signals transported across microwave radio links acquire waveform jitter from local oscillator phase noise. As jitter increases so does BER. The main goals...
Resource Type:: Dissertation

Modified conjugate gradient method for ADSL echo cancellation

Creator:: Inoue, Takao
Abstract:: In recent years, high speed data communications over twisted pair cables has gained tremendous demand. Asymmetric Digital Subscriber Line (ADSL) was standardized for use over twisted pair cables. A critical component in ADSL system is the echo canceller which is intended to discriminate unwanted echo signals caused by twisted pair...
Resource Type:: Masters Thesis

Digital clocks based upon dual side band suppressed carrier modulation

Creator:: Arnett, David W.
Abstract:: A method and apparatus are presented for generating suppressed carrier digital clock signals. These clock signals have the advantage of being broad band in nature and thus exhibiting lower power spectral density. Structures or systems utilizing such clock signals would be less likely to create electromagnetic noise of sufficient intensity...
Resource Type:: Masters Thesis

A study of hardware/software multithreading

Creator:: Carlson, Ryan L.
Abstract:: As the design of computers advances, two important trends have surfaced: The exploitation of parallelism and the design against memory latency. Into these two new trends has come the Multithreaded Virtual Processor (MVP). Based on a standard superscalar core, the MVP is able to exploit both Instruction Level Parallelism (ILP)...
Resource Type:: Masters Thesis

Analysis and modeling of planar microstrip spiral inductors on lossy substrates

Creator:: Lutz, Richard D.
Abstract:: The advent of low-cost RFIC's fabricated in Silicon-based technologies has led to the use of monolithic lumped elements which are located on-die. While it is clearly advantageous to have a high degree of integration and thus fewer off chip elements, parasitic losses due to semiconducting substrate effects can be a...
Resource Type:: Masters Thesis

New results for differentially detected [pi]/4 DQPSK signal in a direct-conversion transceiver

Creator:: Scarpa, Maxime R.
Resource Type:: Masters Thesis

Multi-bit delta-sigma switched-capacitor DACs employing element-mismatch-shaping

Creator:: Lin, Haiqing
Abstract:: Delta-sigma modulators are currently a very popular technique for making high-resolution analog-to-digital and digital-to-analog converters (ADCs and DACs). Most delta-sigma modulators in production today employ single-bit quantization because a 1-bit DAC is inherently linear, whereas a multi-bit DAC is not. Were it not for this drawback, the use of multi-bit...
Resource Type:: Dissertation

Lowpass and bandpass current-mode delta-sigma DACs employing mismatch-shaping

Creator:: Shui, Tao, 1969-
Abstract:: Delta-sigma modulators are currently a very popular technique for making high-resolution analog-to-digital converters (ADCs) and digital-to-analog converters (DACs). These oversampled data converters have several advantages over conventional Nyquist-rate converters, including an insensitivity to many analog component imperfections, a simpler antialiasing filter and reduced accuracy requirements in the sample and hold....
Resource Type:: Dissertation

The architecture of a multimedia multiprocessor

Creator:: Choi, Keung-Sik
Abstract:: The multimedia capabilities of computers have recently become the focus of computer developers due to the increasing demand for advanced computer graphics and new media capabilities, such as video conferencing, 3-D visualization, and animation. To support these multimedia capabilities, specialized graphics hardware, such as MPEG encoding/decoding card, 3-D graphics card,...
Resource Type:: Masters Thesis

Network monitoring with focus on HTTP

Creator:: Schmid, Andreas
Abstract:: Since its introduction in the early 1990s, the quick growth of the World Wide Web (WWW) traffic raises the question of whether past Local Area Network (LAN) packet traces still reflect the current situation or whether they have become obsolete. For this thesis, several LAN packet traces were obtained by...
Resource Type:: Masters Thesis

Reliable controller design for systems with transients

Creator:: Feng, Lei
Abstract:: Reliable controller designs have been developed in this thesis for a number of finite-horizon and infinite-horizon problems with possibly non-zero initial conditions. These reliable controllers assure that system stability and system performance will be maintained despite certain system faults. The performance measure used in this thesis is an "H[subscript ∞]-like...
Resource Type:: Masters Thesis

Convergence study for adaptive allpass filtering

Creator:: Oprisan, Paul
Abstract:: Adaptive filtering may be applied in areas where an optimal filtering algorithm may not be known a-priori and where the filtering operation may be non-stationary. This field, or more generally, the field of adaptive systems, is one which may be regarded as mature, having been the subject of considerable research...
Resource Type:: Masters Thesis

A new correction algorithm for gain and phase imbalances in a homodyne receiver

Creator:: Vogel, Julia
Abstract:: The recent demand for wireless transceivers has created a flurry of research into nontraditional receiver architectures. The homodyne receiver, because of its high degree of integration, low complexity and low power consumption, has surfaced a desirable alternative to the well-known heterodyne receiver. However, distortions such as gain and phase imbalance...
Resource Type:: Masters Thesis

Analysis and measurement of charge injection in switched-capacitor circuits

Creator:: Shen, Min
Abstract:: It has been verified by theoretical analysis, circuit simulation and test that two switch transistors in parallel in a simple sample and hold circuit can be achieve high speed with low error voltage due to charge injection. The wide transistor provides low RC time constant when it is closed and...
Resource Type:: Masters Thesis

A microarchitecture study of the counterflow pipeline principle

Creator:: Janik, Kenneth J.
Abstract:: The counterflow pipeline concept was originated by Sproull et. al.[1] to demonstrate the concept of asynchronous circuits. The basic premise is that a simple architecture with only local communication and control and a simple regular structure will result in increased performance. This thesis attempts to analyze the performance of the...
Resource Type:: Dissertation

A comparison of two types of zero-crossing FM demodulators for wireless receivers

Creator:: McNeal, Jeff D.
Abstract:: A comparison of two novel demodulators. The first is a basic zero crossing demodulator, as introduced by Beards. The second is an approach proposed by Hovin. The two demodulators are compared to each other and to the conventional method of demodulation.
Resource Type:: Masters Thesis

Bang-bang control development of permeability changes in a membrane model

Creator:: Melendy, Robert F.
Abstract:: The application of systems and control theory to membrane physiology is presented here. Modeling efforts have focused on describing those physiologically realistic mechanisms which govern the regulation of membrane permeability in nerve. The motivation behind identifying such mechanisms lies in understanding the morphology of neural activity on a meaningful and...
Resource Type:: Masters Thesis

Power amplifier design in digital CMOS processes

Creator:: Forejt, Brett E.
Abstract:: The ability to integrate designs from board level, multi-chip modules to single process solutions is highly attractive in today's PC multimedia industry. Saving board area and chip count will decrease the production cost of personal computing hardware and increase profitability. The ability to integrate analog circuit capability and it's reference...
Resource Type:: Masters Thesis

Design of high-performance operational amplifiers using an embedded compensation technique

Creator:: Ziazadeh, Ramsin M.
Resource Type:: Masters Thesis

High-speed algorithms & architectures for number-theoretic cryptosystems

Creator:: Acar, Tolga
Abstract:: Computer and network security systems rely on the privacy and authenticity of information, which requires implementation of cryptographic functions. Software implementations of these functions are often desired because of their flexibility and cost effectiveness. In this study, we concentrate on developing high-speed and area-efficient modular multiplication and exponentiation algorithms for...
Resource Type:: Dissertation

High speed analog circuit design using the heterostructure insulated gate field effect transistor

Creator:: Smith, Alexander B.
Abstract:: As Si MOS approaches its maximum limits in speed and bandwidth, new devices are desired to meet the needs of high speed communications and signal processing. A device that exhibits superior performance to Si MOS, BJT, and GaAs technology is the HEMT (high electron mobility transistor). The HEMT offers superior...
Resource Type:: Masters Thesis

The development of commercially viable brushless doubly-fed machines

Creator:: Bellagh, Robert L.
Abstract:: Basic operation, as well as successful development, of the Brush less Doubly-fed Machine (BDFM) has been documented, and research has turned from proof of concept and early development to the more practical direction of increased manufacturability to prove industrial viability. Previous research centered on using standard induction motor stators along...
Resource Type:: Masters Thesis

Performance optimization for doubly-fed generation systems

Creator:: Bhowmik, Shibashis
Resource Type:: Dissertation

Hardware design and protection issues in an AC/AC converter

Creator:: Faveluke, Alex
Abstract:: An AC/AC converter has been designed and implemented for the purpose of providing a modular drive system with a Brushless Doubly-Fed Machine (BDFM.) This converter is to be used in laboratory testing and also as part of a demonstration system in the field. All hardware needed to start and run...
Resource Type:: Masters Thesis

Characterization studies and industrial control development for the brushless doubly-fed machine

Creator:: Koch, Brian
Abstract:: This thesis presents the development of a supervisory controller for a pre-commercial Brushless Doubly-Fed Machine (BDFM) drive system. In addition, characterizations of new diecast rotors for the BDFM are presented. Using the characterization results from the new rotors, a control scheme was developed to allow a BDFM to be packaged...
Resource Type:: Masters Thesis

Interference cancellation for shot-code DS-CDMA in the presence of channel fading

Creator:: Dutta, Amit K.
Abstract:: Interference from other adjacent users in wireless applications is a major problem in direct-sequence code-division multiple-access (DS-CDMA). This is also known as the near-far problem where a strong signal from one user interferes with other users. The current approach to deal with the near-far problem in DS-CDMA systems is to...
Resource Type:: Dissertation

Static space charge in evaporated ZnS:Mn alternating-current thin-film electroluminescent devices

Creator:: Hitt, John C.
Resource Type:: Masters Thesis

State space modeling of alternating-current thin-film electroluminescent devices

Creator:: Peery, Jeffrey B.
Resource Type:: Masters Thesis

CounterDataFlow architecture : design and performance

Creator:: Miller, Michael F., (Michael Frederic)
Abstract:: The counterflow pipeline concept was originated by Sproull and Sutherland to demonstrate the concept of asynchronous circuits. This architecture relies on distributed decision making and localized clocking and data movement. We have taken these ideas and reformulated them into a substantially faster more scalable architecture that has the same distributed...
Resource Type:: Masters Thesis

Embedded passives in a multilayer medium

Creator:: Seo, Yongseok, 1958-
Abstract:: Recent advances in high density low cost RF and microwave three dimensional integration technologies using LTCC(Low Temperature Cofired Ceramics), laminate and other multilayer hybrid and integrated circuits have increased interest in the design of embedded passive components such as inductors, capacitors and filters. The purpose of this study is to...
Resource Type:: Dissertation

A delta-sigma pulse width modulator with pulse dithering

Creator:: Lewison, Richard S.
Abstract:: Pulse Width Modulation (PWM) has been used extensively for motor control, DC-AC converters, DC-DC converters and in audio applications. The conventional method of generating a pulse width modulated signal involves generating an accurate sawtooth or triangle wave using analog circuits. In CMOS, being analog circuit intensive puts extra constraints on...
Resource Type:: Masters Thesis

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

Design of high-speed summing circuitry and comparator for adaptive parallel multi-level decision feedback equalization

Creator:: Gao, Hairong
Abstract:: Multi-level decision feedback equalization (MDFE) is an effective sampled signal processing technique to remove inter-symbol interference (ISI) from disk read-back signals. Parallelism which doubles the symbol rate can be realized by utilizing the characteristic of channel response and decision feedback equalization algorithm. A mixed-signal IC implementation has been chosen for...
Resource Type:: Masters Thesis

Active matrix electroluminescent device power considerations

Creator:: Beck, Douglas
Abstract:: An active-matrix electroluminescent (AMEL) design tool has been developed for the simulation of AMEL display devices. The AMEL design tool is a software package that simulates AMEL device operation using a lumped parameter circuit model. The lumped parameter circuit model is developed primarily to address AMEL power dissipation issues. The...
Resource Type:: Masters Thesis

Improving motion estimation with evolvable search algorithms

Creator:: Dill, Martin D.
Abstract:: Until now the topic of motion estimation, as used in video compression, has been dominated by search methodologies which are modifications of an exhaustive search. This research takes a completely new approach by applying two evolvable search algorithms, the Genetic Algorithm and the Genetic Program, to the area of motion...
Resource Type:: Masters Thesis

The low-power design of prefix adder

Creator:: Chang, Che-jen
Abstract:: Minimizing the dynamic power consumption of a circuit is becoming a more and more important issue for digital circuit design in the age of portable electronics. Among all the arithmetic circuits, addition is the most fundamental operation. Therefore, designing low power adder is an important and necessary research area. In...
Resource Type:: Masters Thesis

Characterization of alternating-current thin-film SrS:Ce electroluminescent devices

Creator:: Thuemler, Robert L.
Resource Type:: Masters Thesis

Interlaced instruction window

Creator:: Ong, Wee-Shong
Abstract:: A relatively recent development in the late 1980s in processors has been the superscalar processor. Superscalar processors use multiple pipelines in an attempt to achieve higher performance than previous generations of processors. Having multiple pipelines makes it possible to execute more than one instruction per cycle. However, since instructions are...
Resource Type:: Masters Thesis

Memory optimization for a parallel sorting hardware architecture

Creator:: Beyer, Dale A.
Abstract:: Sorting is one of the more computationally intensive tasks a computer performs. One of the most effective ways to speed up the task of sorting is by using parallel algorithms. When implementing a parallel algorithm, the designer has to make several decisions. Among the decisions are the algorithm and the...
Resource Type:: Masters Thesis

High-linearity switched-capacitor circuits in digital CMOS technologies

Creator:: Yoshizawa, Hirokazu
Abstract:: In this thesis, novel design techniques have been proposed for implementing high-linearity SC circuits in a standard digital CMOS process. They use nonlinear MOSFET capacitors instead of linear double-poly capacitors. To reduce their nonlinearities, a bias voltage is applied to keep MOSFET capacitors in their accumulation regions. For further reduction...
Resource Type:: Dissertation

Experimental verification of a mismatch-shaping DAC

Creator:: Hudson, William Forrest, 1971-
Abstract:: Delta-sigma data converters have gained popularity in both analog-to-digital and digital-to-analog converters (ADCs and DACs) due to their simplicity, high linearity and immunity to many analog circuit imperfections. These data converters include features such as oversampling, noise-shaping, and (historically) single-bit quantization. Single-bit converters are preferred for their inherent linearity. This...
Resource Type:: Masters Thesis

Distributed arithmetic architecture for the discrete cosine transform

Creator:: Poplin, Dwight
Abstract:: The Discrete Cosine Transform is used in many image and video compression standards. Many methods have been developed for efficiently computing the Discrete Cosine Transform including flowgraph algorithms, distributed arithmetic and two-dimensional decompositions. A new architecture based on distributed arithmetic is presented for computing the Discrete Cosine Transform and it's...
Resource Type:: Masters Thesis

MOSFET-only predictive track and hold circuit

Creator:: Qiu, Xiangping
Abstract:: High-accuracy and high-speed CMOS track-and-hold (T/H) or sample-and-hold (S/H) circuits are an important part of the analog-to-digital interface. The switched-capacitor (SC) circuits usually contain one or more op-amps whose dc offset, finite gain, finite bandwidth have a big impact on the accuracy of the track-and-hold circuit. Basic correlated double sampling...
Resource Type:: Masters Thesis

Novel switched-capacitor circuits for delta-sigma modulators

Creator:: Yesilyurt, Ayse Gul
Abstract:: Oversampled delta-sigma modulation is one of the widely used A/D conversion techniques for narrow bandwidth signals. In this study several new lowpass and bandpass delta-sigma modulator architectures as well as novel pseudo-N-path integrators that can be used in implementing these architectures are proposed. By using multiplexing techniques the new lowpass...
Resource Type:: Dissertation

A graphic user interface for monophonic music analysis

Creator:: Matos G., Soraya J.
Abstract:: A Graphic User Interface is developed to determine the existence of a particular sequence of piano notes within a monophonic sound waveform. Such waveforms are recorded within the Graphic User Interface and then passed to the monophonic analysis engine. The first phase of analysis segments the PCM sound data to...
Resource Type:: Masters Thesis

Sine burst waveform aging and electro-optic characterization of ALE ZnS:Mn ACTFEL devices for head-mounted active matrix displays

Creator:: Mendes, James Kevin
Resource Type:: Masters Thesis

Equalizer design for MDFE channels using nonlinear optimization

Creator:: Onu, Dan
Abstract:: Decision feedback equalization (DFE) is a sampled-data technique used for data recovery in digital communications channels. Multi-level decision feedback equalization (MDFE) has been developed for channels using the 2/3(1,7) RLL code. The optimum detector for a digital communication channel affected by ISI and noise consists of a matched filter, followed...
Resource Type:: Masters Thesis

An adaptive all-pass filter for decision feedback equalization

Creator:: Wiedmann, Ralf
Abstract:: Increasing densities on magnetic data storage devices leads to problems of severe intersymbol interference (ISI), additive noise and non-linearities. Advanced detection strategies for magnetic recording channels fall into two categories: partial response equalization with maximum likelihood decoding and decision feedback equalization. This study focuses on doing an adaptive all-pass forward...
Resource Type:: Masters Thesis

Design techniques of high-performance switched capacitor circuits in the presence of component imperfections

Creator:: Huang, Yunteng
Abstract:: This thesis describes design techniques for high-performance switched-capacitor (SC) circuits, primarily for high-linearity low-noise SC circuits in the presence of component imperfections, such as nonlinear op-amp voltage transfer characteristics, capacitor nonlinearities as well as the finite op-amp dc gain and op-amp offset and noise. Various correlated-double-sampling (CDS) schemes are discussed,...
Resource Type:: Dissertation

Search Constraints

Search Results

Limit your search