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Full-Text Articles in Engineering
A High Voltage Regenerative Pulse Modulator, James D. Doss
A High Voltage Regenerative Pulse Modulator, James D. Doss
Electrical and Computer Engineering ETDs
This paper describes the design of a High Voltage Pulse Modulator that employs positive feedback to generate output pulses of variable width. The modulator is intended for use as a switching device to drive the modulating anode of a five-cavity klystron. The klystron develops more than one million watts of peak power at a frequency of 805 MHz, with duty factors up to 12%. The modulating anode voltage drive requirement is approximately 80 kV with the current drain being of the order of 0.01 ampere. The total modulator current output will be approximately one ampere with most of the current …
Stability Analysis Of Nuclear Reactor Feedback System, Ashok K. R. Bizzul
Stability Analysis Of Nuclear Reactor Feedback System, Ashok K. R. Bizzul
Electrical and Computer Engineering ETDs
A nuclear reactor feedback control system is analyzed for stability conditions in frequency domain by two methods. The nuclear reactor is modeled by a single delayed neutron group model, and the methods of analysis are Popov's analysis and describing function analysis. The feedback system with linearized nuclear reactor model is analyzed by Popov's method. A more exact non-linear reactor model is used in the feedback control system for describing function method of analysis. It is found by both methods that the system is absolutely stable. But describing function analysis gives greater insight to the study of the relative stability of …
Reliability Aspects Of Micropower Majority-Charge Logic, James T. Henderson
Reliability Aspects Of Micropower Majority-Charge Logic, James T. Henderson
Electrical and Computer Engineering ETDs
This thesis is a study of the reliability aspects of micropower majority-charge techniques as applied to fundamental-mode clocked-sequential circuit design. A· sample sequential circuit is used as the basis for the extension of previously developed circuitry. This previously developed circuitry is applied to the sample sequential circuit in the form of Micropower Majority-Charge Flip-Flops. These flip-flops are very immune to transient noise and offer reduced power consumption over standard integrated circuit flip-flops by pulsed power application. The use of AND gates and OR gates with amplifiers and NAND gates or NOR gates for memory elements is reported. It is shown …
An Experimental Study Of Radiation Effects On Metal-Insulator-Semiconductor Structures., Robert James Kopp
An Experimental Study Of Radiation Effects On Metal-Insulator-Semiconductor Structures., Robert James Kopp
Electrical and Computer Engineering ETDs
It is heuristically desirable to automatically display the capacitance-versus-voltage {C-V) and conductance-versusvoltage (G-V) curves (including hysteresis) of metal-insulator-semiconductor capacitors at times subsequent to irradiation. Ultimately, these data will be used to assess the effects of ionizing radiation on the character of the surface states within the device. The purpose of this thesis is to describe in some detail the operation of circuitry that has been designed and fabricated at the University of New Mexico, and that is currently in use here in making automated measurements of this type. Also, the data are placed in a descriptive context involving a compendium …
Reflection And Transmission Of Dipole Radiation In Presence Of An Extended Boundary, Rough And Smooth, Byong Ki Park
Reflection And Transmission Of Dipole Radiation In Presence Of An Extended Boundary, Rough And Smooth, Byong Ki Park
Electrical and Computer Engineering ETDs
Several different forms of integral solutions exist to the problem of dipole radiation in presence of a half space with plane boundary, all of which can be easily shown to agree with one another by transformation. For the evaluation of these integrals, a number of assumptions are usually made on some parameters in the expressions such as the medium property, the wavelength and so on. Unfortunately, however, even with these simplifying (but meaningful) assumptions, practically useful results for the dipole radiation problem are still lacking. Also it appears that there is no theory of dipole radiation when the plane boundary …