Electrical and Computer Engineering Commons^™

A Sine-Wave Frequency Dividing Circuit, Louis L. Fisher

Electrical and Computer Engineering ETDs

The scope of this thesis was to investigate the stability, dividing range and some of the characteristics of a new type of sine-wave frequency divider.

Frequency Modulated Audio Oscillators, James L. Dossey

Electrical and Computer Engineering ETDs

It was therefore the purpose of this study (1) to evaluate existing sub-channel oscillator circuits seeking first, to improve them; (2) to uncover new ideas, and to incorporate them into a frequency modulated audio oscillator that would satisfactorily fulfill the required specifications; (3) once such a circuit was found, to obtain such refinements as simplicity of alignment, interchangeability of tubes, better frequency stability by utilizing proper mechanical design, and smaller, cheaper parameters without sacrificing performance.

An Experimental Investigation Of The Te01 Electromagnetic Fields In Ridge Waveguide, George A. Arnot Jr

Electrical and Computer Engineering ETDs

The aim of this thesis is to arrive at the field distribution of the ridge waveguide for the TE₀₁ mode, either mathematically or experimentally, the latter proving to be the case. Under the heading of Theoretical Considerations the difficulties involved in obtaining a mathematical solution to the problem are presented. The experimental results then follow and in the Conclusions a comparison is made of the results obtained by other writers and the author's data.

A Theoretical And Experimental Analysis Of Delay Circuits, Shuh-Tuh Tsai

Electrical and Computer Engineering ETDs

A delay circuit is a circuit which produces rectangular pulses of specified duration.

A rectangular pulse consists of three parts: first, a sudden rise of voltage; second, remaining a constant voltage during a certain time interval; and third, a sudden drop of voltage to its original value.

If the sudden rise of voltage at t, is produced by a certain sudden action of a circuit previous to the pulse circuit, the sudden drop of voltage at t₂ can cause another circuit to produce a sudden action. Thus, the second action is produced by the first action at a time …

An Experimental Investigation Of Multivibrators, Harry W. Gates

Electrical and Computer Engineering ETDs

The object of this study is two-fold. The first part of the investigation is concerned with substantiating experimentally the mathematical analysis for the conventional multi-vibrator and to derive similar expressions for the grid return multi-vibrator. The second purpose of this investigation is to delve into several possible ways of improving the linearity and thereby the frequency division usefulness of the multi-vibrator.

Pulse Ratings And Thermal Characteristics Of Power Transistors, Christopher Jako

Electrical and Computer Engineering ETDs

Power transistors are used in switching circuits of various types. Their operation in these circuits can be considered as an essentially on-off operation. Designers working with these circuits found that the ratio of the on-time to the off-time is a critical factor in determining the average power that the transistor can dissipate without exceeding its inherent temperature limits.

Spot Welding Low Carbon Steel, Leonardo Gutierrez

Electrical and Computer Engineering ETDs

This investigation of spot welding on low carbon steel was undertaken to study the quality of welds under different welding conditions. Low carbon steel is one of the most readily weldable materials of all metals and alloys used in resistance welding processes. Its metallurgical structure is such that fusion between separate pieces may be accomplished in a broad range of temperatures, so that precise control of welding conditions is not necessary for producing a spot weld. Because of this ease in securing a weld, more and more of the many low carbon steel products are being spot welded. This makes …

Energy Loss In Commercial Condensers, Walter Roland Allen

Electrical and Computer Engineering ETDs

The investigation of the energy loss in condensers is one which electricians and experimenters have long carried on. Their efforts have been restricted chiefly to alternating currents. Many methods have been proposed and used with varying success. The losses in condensers are due to dielectric hysteresis and leakage. That the dielectric of a condenser becomes heated when an alternating current is applied to terminals has long been known. A condenser which has been charged does not lose its entire charge when it is discharged, part of it remaining as a residual charge. Kleiner used the thermo-couple embedded in the dielectric …