Electrical and Computer Engineering Commons^™

Transient Response Of A Mass Mounted On A Nonlinear, Strain-Rate Sensitive Element, Wiley T. Holmes

Electrical and Computer Engineering ETDs

The object of the present transient movement study was not that of investigation of response of a nonlinear system alone, but was projected to include the effect of a strain-rate sensitive, nonlinear restoring element.

Transistor Distributed Amplifier, Bill J. Harper

Electrical and Computer Engineering ETDs

For the purpose of this report, it is assumed that the behavior of the transistor can be predicted from the study of a suitable circuit model or equivalent circuit of the transistor. It is further assumed that, except for the intrinsic short-circuit current gain, the circuit parameters of he transistor are independent of frequency and temperature. The primary interest in the study of transistor distributed amplifier here is the amplitude of the voltage gain in the amplification of video frequencies. Somewhat less detailed studies are made of the distributed amplifier in band-pass applications.

An Amplitude-Stable, Fixed-Frequency Transistorized Power Supply, Bobby O. Allen

Electrical and Computer Engineering ETDs

The subject of this paper is the design of an ultrastable, fixed- frequency power supply capable of maintaining a high degree of amplitude stability over a wide range of resistive load values. The requirement for such a power supply originally arose in connection with the design of a particular piece of test equipment required by Sandia Corporation. No attempt will be made in this paper to justify or explain the necessity for the specified design criteria outlined in the following paragraphs other than to adequately define the design criteria.

Safe Thermal Operation Of Power Transistors Under Pulsed Excitation, George R. Swain

Electrical and Computer Engineering ETDs

One desires to find the relationship between thermal stability and such factors as temperature within the transistor, power dissipation in the transistor junctions, collector saturation current, and thermal resistance. In the approach set forth in this paper, the theory of solid state heat flow is applied to a simplified thermal model of a power transistor.

The Design, Construction And Testing Of An Electrical, Transient Heat Flow Analyser, Bruce Wilcox

Electrical and Computer Engineering ETDs

The purpose of this investigation was (a) to design and build an analog which would produce the solution to a simplified yet typical transient aerodynamic heating problem, (b) to obtain the solution using the analog and to check the accuracy of the solution by mathematical computation, and (c) to code a more involved aerodynamic analog.

Comparison Of Observed And Calculated Near-Vertical Radar Ground Return Intensities And Fading Spectra, James Arlin Cooper

Electrical and Computer Engineering ETDs

The study of ground-to-air terrain return is necessary in order to understand the functioning of radar altimeters.

Radar return at vertical incidence can be considered to be composed of two components. One, whic his returned by a mirror-like action, is called the specular component. The other, termed scatter, is due to diffuse rerediation from individual scatterers on the ground.

In recent work on return from angles near vertical, more attention has been given to the scatter component than many had previously assumed necessary.

Procedure for Gathering Data:

Two pulse radar units were used, one having a frequency of 3.8 KMC, …

Design Of An Experiment To Separate Specular And Scattered Radar Returns, Robert B. Glascock

Electrical and Computer Engineering ETDs

This paper describes the design of a radar experiment that will be conducted by the U.S. Naval Research Laboratory at Washington, D.C. The proposed experiment and the background of the problem are discussed, as well as the theoretical background, experimental background, and other design considerations are discussed in later sections.

A Study Of The Reset Cycle Of A Half-Wave Self-Saturable Magnetic Amplifier, William W. Lee

Electrical and Computer Engineering ETDs

It was the purpose of this study (1) to investigate the reset cycle of a half-wave self-saturable magnetic amplifier by graphical analysis of the irregular voltage functions appearing across the gate winding during reset; and (2) to determine if possible from this analysis a more satisfactory design method than those now available. Conditions of constant current reset were employed and the core material used had a nearly rectangular hysteresis loop. Resistive loads only are considered.

Utilization Of The Relationship Between The Complex Immittance And The Indicial Immittance Functions For The Synthesis Of Two Terminal Networks, Julian T. Lefler

Electrical and Computer Engineering ETDs

It was the purpose of this study (1) to develop a new method of network synthesis from a specified complex immittance function; and (2) to demonstrate the application of the method by means of its use in the solution of representative synthesis problems. This work deals only with the synthesis of two terminal networks containing linear, passive, lumped-constant elements, from given rational immittance functions of the complex frequency variable.

Not considered part of this work are (1) the development of the immittance function from frequency-response specifications (the approximation problem); or (2) the treatment of active, non-linear, or time varying network …

A Study Of A Complementary Symmetrical Power Switching Circuit, Glenn S. Mills

Electrical and Computer Engineering ETDs

This paper contains an analysis of a symmetrical, complementary, power switching circuit employing complementary power transistors. A DC analysis is made for the bistable states. Also described is a voltage regulation and bias circuit which improves stability and contributes to the protection of the transistors. The problem of switching transients is investigated and empirical results presented to support theoretical considerations. A new triggered method is proposed to utilize the bilateral characteristics of a transistor. Applications of the circuit are suggested for controlled-frequency and self-triggering modes of operation. A method and analysis for self-triggering is presented. The advantages of this power …

The Use Of Electrical Resistance Strain Elements In Three-Dimensional Stress Analysis, Robert I. Brasier

Electrical and Computer Engineering ETDs

The purpose of this thesis is to present a new method of experimental stress analysis and to give the solution to a problem which has been handled by this method.

Determination Of Q Factors And Operating Characteristics For Microwave Cavities And Oscillations, W.P. Stearns

Electrical and Computer Engineering ETDs

This paper has as its objective the presentation of the theory involved and method used with respect to the resonant cavity parameters; loaded Q, unloaded Q, external Q, pulling figure, and circuit efficiency for the resonant cavity investigated. Experimental data on a particular cavity are discussed and the previously mentioned cavity parameters determined with the use of such data and the particular method presented. A Rieke diagram for the particular cavity investigated is also presented and discussed.

An Investigation Of The Response Of A Velocity Sensing Resonant Oscillator In An Inertially Operated Distance Meter, Howard F. Devaney

Electrical and Computer Engineering ETDs

It was the purpose of this study to investigate the response characteristics of a resonant mechanical oscillator utilized as a governor in conjunction with an inertial distance meter to sense velocity of a carrier. In order to initiate any desired event at a predetermined velocity of a vehicle (for example: fuel cut-off in a conventional liquid fuel rocket motor) it is often desirable to utilize a component requiring no external power for its operation. Such a component would be activated by inertial force and, by some means, integrate the force (or acceleration) with one respect to time and provide a …

The Rating Of A Power Type Transistor, Richard Lee Mann

Electrical and Computer Engineering ETDs

The purpose of this paper is to describe the test performed and present the results obtained in an attempt to establish the maximum permissible direct current and pulse ratings for the type of CTP-1003 (Clevite Transistor Products) power transistors under typical operating conditions. The manufacturer's specifications for the type of CTP-1003 power transistor are located in Appendix A.

The Dc Design Of Reliable Multistable Circuits, Richard H. Williams

Electrical and Computer Engineering ETDs

The reliability of a piece of equipment is a measure of its ability to function as intended. Equipment may malfunction in two different ways. It may fail catastrophically as a vacuum tube does when its heater opens; it may fail gradually as a vacuum tube does when its transconductance slowly falls to an unacceptable level over a period of time. It is not the intent of this paper to study catastrophic component failures, but rather to illustrate a technique whereby gradual failure of circuits can be minimized.

A Binary-To-Decimal Converter, Samuel D. Stearns

Electrical and Computer Engineering ETDs

This paper describes a device which electronically converts a binary number into its decimal equivalent. Such a device might be of use in digital computers, many of which use the binary number system, and also in similar machines, such as pulse code modulated data collectors.

The binary-to-decimal converter described here was designed specifically for use in Sandia Corporation's High-Speed Digital Recording and Data Handling System, which actually uses the Gray code rather than the binary number system. However, conversion from Gray to binary (see Appendix B) is simple, and a binary-to-decimal converter seems much simpler than a Gray-to-decimal converter.

Transistors Applied To An Fm-Fm Airborne Radio Telemetery System, R. H. Gablehouse

Electrical and Computer Engineering ETDs

The two semiconductor elements commonly used in transistor production, silicon and germanium, were discovered by two European chemists. A Swedish chemist, Jons Jakob Berzelius, separated and identified silicon in 1823. Germanium was discovered and named by a German chemist, Clemens Alexander Winkler in 1886.

A Technique For Obtaining Submicrosecond Exposure Times At Large Aperture In High-Speed Photography, Joseph A. Hull

Electrical and Computer Engineering ETDs

The purpose of the investigation described in this report was to attempt to improve one of the existing techniques, namely, the Kerr cell type electrooptical shutter, to make it more applicable to the study of high-explosive physics. To provide a background for the reader, a brief discussion of the other techniques will be described. Some of the advantages and limitations of these systems will be discussed.

Determination Of The Residual Vswr [Voltage Standing Wave Ratio] Of A Slotted Line., Michael C. Robel

Electrical and Computer Engineering ETDs

Idealistically, a slotted line should be designed so that, when it is terminated in its characteristic impedance, the VSWR as determined by a movable probe in the slotted line will be 1.0. However, in practice this is not possible, particularly in the case of coaxial slotted lines where matching elements, adapters and connectors are utilized. The devices mentioned above have physical discontinuities which give rise to reflections, which cause a standing wave to be produced even though the line is terminated I its characteristic impedance.

High Stability Lc Oscillator For Use With A Capacitive Pressure Sensing Element, Arthur J. Eldridge

Electrical and Computer Engineering ETDs

In the course of work at the Sandia Corporation, a definite need arose for the measurement of barometric pressures to an accuracy beyond that attainable with commercially available equipment. The standard instrument for measuring these pressures is the mercurial barometer. While a visual method of reading the instrument produced good results to within a 0.1 millimeter of mercury, it was dependent upon the operator using as a reference a target of sighting on the top of the meniscus formed in the barometer tube by the mercury.

Corona Threshold Of Single And Multiple Conductor Lines, David S. Carrick

Electrical and Computer Engineering ETDs

Corona is a self sustaining, often luminous discharge due to ionization adjacent to charged conductors, characterized by the electrodes having a small radius of curvature compared with the interelectrode gap. The display on a power transmission line is accompanied by a current between the conductors which to an engineer mean a power loss that should be minimized if unavoidable.

A Proposal For Two Computers Dealing With The Convolution Integral, Charles S. Williams Jr.

Electrical and Computer Engineering ETDs

The integral f(x) = g(x-y)h(Y)dy is known as a convolution integral. The first computer described herein will determine the function f when the functions g and h are known. The second computer will determine the function h when f and g are known; in using the second computer to find h, then the first computer is used for auxiliary computations.

A Study Of Servomechanism Damping Methods, Arthur J. Clark Jr.

Electrical and Computer Engineering ETDs

The purpose of this study is first to present a review of the general effects of damping, both Coulomb and Viscous, and feedback devices resulting in error rate damping: second to present detailed mathematical analyses of a number of special damping devices that may be used to advantage in servomechanism design.

Crossover Networks For Loudspeakers, Edward A. Brown

Electrical and Computer Engineering ETDs

No abstract provided.

A Variational Approach To The Calculation Of Electron Trajectories, Edmund G. Franzak

Electrical and Computer Engineering ETDs

It is the object of the present work to derive, develop, and illustrate a method for the calculation of electron trajectories based on variational techniques and employing scalar and vector potential functions instead of the customary intensity functions. The methods of the calculus of variations furnish an extremely basic approach to the problem while lending an undeniable air of rigor and mathematical elegance.

Solution of the problem will be accomplished by first setting forth a mathematical structure upon which the work will be based, next outlining the physical principles governing the problem and finally applying the mathematical theory and physical …

An Analysis Of A Shunt-Peaked Video Amplifier And Feedback Pair Having The Same Edge Response, Bernard J. Regenauer

Electrical and Computer Engineering ETDs

Statement of the problem. It is the purpose of this study (1) to investigate the feasibility of employing a feedback pair instead of a shunt-peaked video amplifier in a typical circuit application; (2) to determine the steady-state gain ratio between a feedback pair and a single shunt-peaked video amplifier having the same edge response (rise time and overshoot) and to analyze the effect of varying either the rise time or overshoot of both circuits upon this ratio; (3) to make a limited study of the steady state gain ratio of a feedback pair and a cascade of two shunt-peaked video …

The Transient Response Of A Distributed Amplifier, Thomas D. Lusk

Electrical and Computer Engineering ETDs

The purpose of this paper is to describe the transient behavior of a simple constant-K distributed amplifier stage. The derivation of the transfer function is carried out using the Laplace Transform for the case where losses in the lines are considered to be zero. The various characteristics of the amplifier response to a unit step function are discussed and the effects of losses and other modifying factors upon the idealized response are evaluated. Finally design procedures are derived which allow the circuit designer to determine the circuit parameters necessary for good transient responses. These procedures are applied to the design …

An Experimental And Theoretical Investigation Of The Characteristics Of A Magnetic Amplifier, Merle H. Wittmeyer

Electrical and Computer Engineering ETDs

Many excellent analyses of magnetic amplifiers have been published. As in every investigation, however, there are many details not explained. The purpose of this investigation was to explain some of the details of magnetic amplifier characteristics.

Servo-Stabilization Of Drift In Wide-Band D-C Amplifiers., Joel M. Simmons Jr.

Electrical and Computer Engineering ETDs

It was the purpose of this study to determine the suitability of a comparator and negative feedback circuit (servo-type) as a general utility method of reducing the end effect (zero-drift) of changing static characteristics of the vacuum tubes and other associated components in wide-band direct-coupled amplifiers. A brief description of the drift servo-stabilization system and its drift reducing characteristics are as follows.

An Analysis Of A Cathode-Coupled Multivibrator, Fred T. Sinnott

Electrical and Computer Engineering ETDs

The purpose of this study is to develop an analysis for monostable cathode-coupled multivibrators and verify the analysis by experimental results.