Electrical and Electronics Commons^™

Microprocessor Controller For A Multi-Targets System, Shoeineng Lin

Theses

This thesis presents a microprocessor controller for a multi-targets system, which is designed by a direct digital control in the modern computer-aided manufacture system. It is made up of digital control theory, computer hardware configuration and software algorithm. An example is illustrated by IBM PC/XT computer. In this example, the control laws of three simple targets are developed and implemented by C-language. Simultaneously, the computer self-test routines, such as CPU, ROM etc, are developed by intel-8088 assembly language.

Interfacing Of The Digital Spyghnomanometer [Sic] Ds-165 To The Intel 8052ah Basic Based Single Board Computer, Rakesh P. Patel

Theses

The aim of this thesis is to collect the measured data from the blood pressure measurement unit to the single board computer and to store the data for the analysis purposes.

Testing Of Ultrasonic Bonding In Microcircuits, Ioannis Andrea Phiniotis

Theses

A model for the ultrasonic bond as used in making microcircuit interconnections was studied. This model was based on Bowden & Tabor's dry friction theory and Mindlin's analysis of Hertz's model for elastic deformation under compressive and shear stresses. To develop a well-controlled bonding system, the critical bonding machine parameters were determined, and a high-frequency capacitor microphone was fitted to the bonding machine to monitor the tool tip oscillation. Application of these techniques made it possible to control the parameters of the machine to ±5%. Flip-chip bond studies were made using this machine. The data obtained were consistent with the …

Computered-Aided Digital Filter Design And Simulatio, Pao-Tsan Chiang

Theses

The simulation is written by C language on AT&T Unix pc 7300 environment, some fundamental mathematics is introduced in the beginning, then digital filter specification method: window, frequency sampling, equiripple are discussed, and Kaiser window method is discussed in details for programming.

There are many problems are met in my simulation, such as F.F.T. aliasing, leakage, Picket fence convolution, correlation, but solutions are proposed.

The result could be output data and graph, GSS_Drivers graph package is utilized, because consideration of operation speed and convenience are emphasized, speed is compromised, but easy to be restructured.

A Dsp Toolkit For The Unix/C Environment Of The Pc 7300 Compute, Suwutchai Jesdanun

Theses

The Digital Signal Processing (DSP) TOOLKIT is a package of programs designed to use the fast Fourier transform (FFT) and display its output responses in graphics form. This tool provides three different window functions and five data modifiers for filter designing and spectrum analysis. Flexible features for modifying the plottings, such as y-axis auto-scaling, xy-axis scaling and center line adjusting of the graphics display, are included.

All programs are written in C programming language for the UNIX System Environment of the UNIX PC 7300 computer. The program structure of DSP TOOLKIT is designed so that modules can be added or …

An Investigation Of Electrical And Optical Properties Of Sputtered Amorphous Silicon Nitride And Germanium Thin Films, Rajendra S. Khandelwal

Theses

Low temperature preparation of thin amorphous Silicon Nitride and Germanium Films by direct RF sputter deposition was investigated. Influence of various sputtering parameters on film properties was studied. Infrared transmission spectrophotometry was used to evaluate optical properties of the films whereas electrical characteristics of the films were determined from current-voltage measurements of MIS structures. For Silicon Nitride films it was observed that the stoichiometry, as indicated by the IR transmission, dielectric constant and current density versus square root of electric field measurements, was a strong function of the sputtering gas composition and particularly the Ar/N ratio in the sputtering gas. …

Hardware Based Data Compression System Using Sliding Dictionary Algorithm, Hemant L. Nerurkar

Theses

Popular data compression schemes found in the literature are software based and present innumerable difficulties in hardware implementation. A data compression scheme, which can be directly implemented in hardware using systolic arrays, has been described. The scheme has a remarkable ability to 'adapt' itself to the changing statistics of the source file. Results generated after a comprehensive study and simulations of the algorithm have been presented. The scheme is inherently suitable for parallel processing. It can be incorporated in transmitting devices since it can be fabricated on a single VLSI chip. Comparison has been made with the LZW scheme. A …

Analysis Of An Inertial Navigation System On A Silicon Wafer, Ashok K. Parida

Theses

This thesis describes a self-contained inertial navigation system for commercial vehicles. It is low cost miniature system employing some of the newest techniques in micromechanical and microelectronic hardware.

The system employes an array of vibrating tuning fork gyros, a number of feedback force-balance accelerometers, and a central processing unit, all fabricated on a silicon wafer using integrated circuit fabrication technology. A miniature platform (size of a golf ball) driven by gearless torque motors is used to provide a quiet environment for the gyros and accelerometers. There are radio links between components that are on and off the platform (eliminating need …

Probabilistic Technique In Power Flow Analysis, Dun-Ren Tzeng

Theses

This thesis describes and examines a technique which permits the power flow problem in a power system to be analyzed probabilistically. Both the deterministic and the probabilistic power flow theories have been presented. A mathematical model and a program have been developed to carry out the probabilistic power flow calculation. Two power systems and seven different loading cases have been used to test the technique. The results including the sensitivity coefficient matrices, the expected line flows with their variances, and 25 of 176 probability density function curves, have been shown and discussed. An easy way to predict the possible abnormal …

Method Of Moments Analysis Of Very Thin Wires Using The Mini-Numerical Electromagnetics Code, Douglas F. Stolarz

Theses

The analysis of thin wire antenna systems in the presence of a conducting ground plane is an important engineering problem. This thesis presents an analysis of wire radiators using the method of moments as implemented in the Mini-Numerical Electromagnetics Code (MININEC). Due to singularities in the formulation, MININEC yields inaccurate results for very thin wires. This code was modified by introducing filament currents for very thin wire structures thereby eliminating inaccuracy due to the treatment of singularities.

The modified code was tested on a monopole over a perfect ground, symmetrical and asymmetrical dipoles in free space, and inverted L and …

Time Series Analysis Of Respiration Component In Heart Rate Variability, Anuradha Ramaswamy Iyengar

Theses

Time series signal processing techniques (Fourier based) were applied to analyze the relationship between heart rate and respiration. This analysis takes advantage of the different timing charecteristics of the autonomic nervous system inputs to analyze their influence on the heart rate.

Data from three experiments were analyzed. The first set of data was from helicopter pilots of the US Army. They injected atropine into themselves on certain days. The effect of atropine on the heart rate spectrum and the relationship between heart rate and respiration was studied. It was found that atropine abolishes the respiration peak in the heart rate …

Properties Of Sputtered A-Ge And A-Ge : H Thin Films, Hanjin Cho

Theses

The effect of the amorphous and glassy structure of amorphous germanium films on their electrical characteristics was investigated experimentally. The films were deposited onto silicon substrates using a modified MRC 8800 triode sputtering system. The Poole-Frenkel and Schottky mechanisms are discussed in detail and the shortcomings of the accepted picture of the former in amorphous materials are dealt with. It was concluded on the basis available evidence that the current flow in amorphous germanium favors the Poole-Frenkel mechanism at high fields.

Amorphous hydrogenated germanium films which were deposited by bias sputtering were characterized by measuring the infrared absorption. The films …

A Computer-Aided Design And Manufacturing System For Wiring Boards Production, Shiau Chia-Ming

Theses

Our purpose is to build some SBC-8052-BASIC microcontroller based instrument systems, and this thesis integrate resources from two areas into a powerful CAD/CAM system for this purpose. Since wiring board is the most popular used tool for laboratory development and small-scale manufacturing, a microcomputer-aided design and manufacturing system is developed to improve the whole efficiency from wirelisting and wiring sequences to hardware and software debugging. So anytime a circuit theory design stage is finished, the prototype can be made easily, then tested and redesigned, till last stage producing. Several practical wiring board circuits have been made through this system, it …

Microcomputer-Based Automated System To Monitor Flow And Respiratory Quotient, Chung C. Chien

Theses

An instrument system has been designed to monitor Respiratory Quotient experiments on rats which are living within whole-body calorimeters. By using multiplexing techniques, this system is capable of monitoring Respiratory Quotients in six calorimeters (animal chambers). It exhibits some features that make it more versatile than the previous system. One of the features of this instrument is that it uses a more accurate method of determining rapid changes in gas exchange between subject and environment. The value of this method is its ability to assess the rapid change in metabolic rate which occurs as a result of change in activity, …

A Data Compression System Using Arithmetic Code, Seokrim Choi

Theses

Generally it is difficult to compress data, from statistically unknown sources, with significant compression ratio. To achieve this, the compression scheme should have an ability to gather context information of the source, adaptively. For better compression, it is desirable to separate the context gathering scheme from coding itself. Arithmetic code is very flexible and can accept any kind of context gathering scheme which can generate probabilities. One context gathering algorithm which generates Markov type probability adaptively is studied and implemented in software using Arithmetic code. This scheme performs well and results in compression ratio better than any existing algorithms such …

Ksc2408 Digital Filter Evaluation System For The Ecg, Chi-Tong Chung

Theses

A hardware implementation in digital filters by using the high speed and high precision KSC2408 digital filter chips, demonstrates the power of the KSC2408 and proves that the real time digital filters can be implemented without complex circuitry and without high expense.

The system consists of two parts - the digital filter board and the IBM PC; the former handles the data filtering, the latter handles the analog-to-digital data conversion and data display. The KSC2408 is programmed as a 16th order Butterworth digital filter to have flat response in the passband and good attenuation in the stopband.

Reliability Evaluation Of Liquid Crystal Displays Under Accelerated Life Conditions, Rajkumar Krishnamoorthy

Theses

This Thesis shows method of comparing the reliability of Liquid Crystal Display Devices by means of accelerated life testing at elevated temperature and relative humidity for two different vendors.

The tests were carried out at three different combinations of temperature and humidity.

1. 77°±1° C and no added humidity.

2. 85°±1° C and no added humidity

3. 98°±1° C and 98+2% relative humidity.

Leakage current measurements were carried out after every 1000 hours for up to 5000 hours for vendor no.l. Measurements were carried at 0, 500, 1000, 2000, 3000 and 5000 hours for vendor no.2. A DC bias of …

Image Analyzing Instrumentation System For The Activity Measurement Of Rats, Yun-Kang Li

Theses

A microcomputer based instrumentation system has been developed to measure the activity of rats in 12 metabolic chambers. The instrumentation system monitors the rats' behaviors and estimates their activity continuously in an automatic manner. The activity information of the rats are expressed by a quantitative index which describes the intensity of the activity level.

An Apple II microcomputer system is used to manage the activity measurement which consists of an image recording operation and an image analyzing operation. During the measurement, the microcomputer controls Optic RAM digital cameras to record the rats' image. The camera can take a digital picture …

Mizer : A Ruled Based Cad Tool For Logic Optimization, Sandip Mukerjee

Theses

This objective of this research was to develop a knowledge based CAD tool, to address the problems of Logic Design. MIZER is an expert system, that accepts functional specifications of a logic circuit and connectivity description of its implementation to generate an optimal design. This information is then used to develop a hazard free circuit that brings about an optimization in area and timing. It stores the newly created design into its knowledge base with the approval of the designer, for future use.

Investigation Of The Size Of Gallium Clusters Formed Using A Modified Ion Cluster Beam Source With A Crucible Temperature Of 1250 Degrees C, Sujit M. Shah

Theses

Energy analysis of the ionized gallium clusters was done by retarding field method. The objective of this research was to investigate the possibility of gallium cluster formation during nozzle jet expansion and to estimate the probability of ionization of clusters. The measurements at a crucible temperature of 1250°C corresponding to gallium vapor pressure of 0.23 torr (inside the crucible) showed that no large cluster sizes could be obtained. The relationship between mass deposition rate (atoms/cm2-sec) and cluster size (atoms/cluster) showed that there were two distinct peaks. One with a cluster size of 1 atom/cluster and the other with about 13 …

Graphical Interpretation Of U.S. Tidal Data, Vaheh Shahbazian

Theses

Numerous Shore line operations relating to industry and conservation would benefit from convenient access to continuous tidal predictions. Easy Graphical access to continuous long term predictions of tidal heights at a location of interest will simplify operations that are sensetive to tidal predictions. A specific example, is the implementation of a protective measurements against flooding and destruction of shoreline facilities particularly at times of high tides.

This thesis consists of three things. First, rendering NOAA's data in a form accessable to a PC user. Second, it provides a Basic program for prediction of tides. Third , PC user programming Resourses …

Reliability Studies On Microcircuit, Salim Shehadeh

Theses

The primary objective of this thesis is to determine and analyze the failure mechanisms of Low Power Schottky microcircuit device (2-Input NAND Gate). Pinpoint the causes, and suggest the precautionary measures that prevent the occurrence of these failures. To achieve this goal, the study went in two directions, theoretical and experimental. The theoretical part is a comprehensive review of the work done on Low Power Schottky 2-Input NAND Gates since 1960 up to date.

The experimental part of the study is a life test ( 1000 hours ) of 2-Input NAND Gates under humidity and high temperature.

For each unit, …

Life Testing Of Solid Dielectric Materials, Muhammad Irfan Soomro

Theses

The main objective of this thesis was to find correlation between the electrical noise generated within the body of the solid dielectric material with the failure (puncture), under simultaneously applied thermal and electrical stresses.

The term 'Corona' is commonly used to describe any partial discharges occurring in voids (defects) in the material. Precisely corona is a flow of electrons and ions which occur in a void in air or other gasses. This event emits acoustic, optical and radio frequency energy, and can be detected by measuring any of these radiations. In the present thesis, Radio Interference Voltage (RIV) technique was …

Weighted Least Square State Estimation In Power System, Jinn-I. Wu

Theses

In this thesis two methods for power system real-time monitoring are presented, programed and tested. Method 1 is not new and method 2 is a modification of method 1. The two methods are comparable in performance and they solve the problem satisfactorily.

These methods are iterative and the problem of choosing a convergence criterion is unexplored yet. This problem has been discussed, guidelines are presented to select an optimal convergence criterion.

The concept of confidence level and techniques for error detection are investigated. programs to detect bad data and to establish a confidence level have been written and some tests …

Implementation Of Xilinx Development System And Xilinx Lca Application, Youcheng Wu

Theses

The Xilinx Application-Specific Integrated Circuit (ASIC) is a large array of programmable logic cells. Creating logic design using the Xilinx ASIC offers ease of implementation, high function density, design flexibility and lower consumption of supply power. The techniques of implementation of system and design with Xilinx CAD/CAM System include system analysis, modification, update, optimal design algorithms and real circuit emulation.

This thesis combines the setup and operation of the complete Xilinx system, and implement Xilinx LCA into 8052AH-BASIC based Single Board Computer and user's menu of real LCA chip evaluation Board. It presents our own design, construction, test and demonstration …

Xilinx Asic Design For A Single Board Computer, Hong Zhan Ye

Theses

Xilinx Application-Specific IC is a new kind of programmable cell array with high design flexibility and functional density. It not only has excellent circuit-board utilization and low power consumption, but it also offers easy implementation with lower engineering cost and very short production-rampup period.

This thesis provides a complete and specific procedure for implementing Xilinx LCA into a 8052AH-BASIC based single board computer with XACT development system. It verifies all the results from debugging SBC2064 design using both XACT query system and P-SILOS simulator.

The technology of implementing a whole system design with software and hardware fully proves the possibility …

The Study Of The Response Of Nucleus Ambiguus Neurons To Blood Pressure Changes, Adrienne Zoe

Theses

The purpose of the project is to aid the study of the response of nucleus ambiguus neurons to changes in blood pressure. The sampling runs indicate that there is a correlation between blood pressure and neuron activity for some of the neurons monitored. Some neurons react to blood pressure increases by Increased neural firing rate while others react by decreased neural firing rate. Some neurons do not respond to blood pressure manipulation comprising the non-vagal neurons. A system was developed for the DIN PC to collect electrocardiogram, blood pressure, and neuron activity from a dog, and to perform non-real time …

Study Of Reliability And Failure Mechanism Of Solid Tantalum Capacitor, Rajan N. Bhatt

Theses

Today, reliability is acknowledged as an important item in design and operation of the electronic systems.

This thesis provides some theory, and experiments are instituted to evaluate the reliability of SOLID TANTALUM CAPACITORS made by reputed manufacturers. The experiment was conducted on four batches of tantalum capacitors at different temperatures at different humidity levels. One chapter is on different manufacturing techniques presently applied.

Literature study concentrates on the reliability in solid tantalum capacitors developed between 1961 and 1986.

Several failure mechanism with figure are illustrated to point out how higher reliability of solid tantalum capacitor may be developed.

The bibliography …

A Cad Tool For Edif Model Generation, Sri Nagesh Valluri

Theses

This thesis describes a new CAD tool designed to create models proposed by Electronic Design Interchange Format steering committee. In its present form the system can generate models for standard SSI and MSI devices. The menu driven window based fillup the form features of the tool allows a novice user to provide structural and timing informations of the device from any manufacture's data book. The software performs online checking of the user data and guides them to generate the correct model.

Performance Of Second Order Delta Modulation System, Reza Aghazadeh Alavi

Theses

The performance of an ordinary delta modulation (DM) system under three types of input signals was investigated. These signals were band limited Gaussian noise, 800 Hz sine wave, and speech signal. The affects of 2nd DM added to the ordinary DM in improving the performance of the system were researched. This is called a Second Order Delta Modulation System. The obtained data showed an increase of about 3dB in the overall Signal to Noise Ratio (SNR) of the system, in the worse case.

Input to the 2nd DM is the band limited error of the first DM. A linear phase …