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- Adaptive control systems -- Design<br />Lyapunov functions (1)
- Asynchronous circuits<br />Sequential circuits -- Design<br />Logic circuits (1)
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Articles 1 - 24 of 24
Full-Text Articles in Engineering
Basic Design Of Mosfet, Four-Phase, Digital Integrated Circuits, Earl Morris Worstell
Basic Design Of Mosfet, Four-Phase, Digital Integrated Circuits, Earl Morris Worstell
Masters Theses
"MOSFET is defined as metal oxide semiconductor field-effect transistor. The integrated circuit design relates strictly to logic and switching circuits rather than linear circuits. The design of MOS circuits is primarily one of charge and discharge of stray capacitance through MOSFETS used as switches and active loads. To better take advantage of the possibilities of MOS technology, four-phase (4[phi]) circuitry is developed. It offers higher speeds and lower power while permitting higher circuit density than does static or two-phase (2[phi]) logic. Equations are developed that apply directly to the design of four-phase logic along with examples of circuitry that show …
The Design Of Three-Port Strip Line Circulator, Jeng Seng Chang
The Design Of Three-Port Strip Line Circulator, Jeng Seng Chang
Masters Theses
"This dissertation is concerned with the analysis and design of the radius of ferrite disk of strip line circulator using a generalized analytical field expression. The first part consists of an analysis of the field in the ferrite disk with the TEM wave incident normally on the air-ferrite boundary. It is approximated by taking the boundary condition at the incident and outlet points, so that analytical expressions for the electric and magnetic fields can be obtained. The next part consists of an approximate method to determine the radius of the ferrite disk based on the result obtained in the first …
An Analysis Of An Audio Amplifier Utilizing An Operational Amplifier And Negative Feedback, Anthony Francis Lexa
An Analysis Of An Audio Amplifier Utilizing An Operational Amplifier And Negative Feedback, Anthony Francis Lexa
Masters Theses
"An audio amplifier utilizing a monolithic operational amplifier is analyzed. The analysis is a block diagram approach where the amplifier is divided into three parts; operational amplifier, power amplifier, and feedback network. A Fourier series analysis is used to describe the distortion and signal components of the amplifier output. The results of this analysis demonstrate the advantage of large negative feedback on frequency response and harmonic distortion. Using relatively few passive components a high quality audio amplifier is constructed with an output power of 15 watts RMS power and negligible harmonic distortion"--Abstract, page ii.
Telecommunications System Design Considerations For Advanced Logistic Spacecraft, James Myron Romberg
Telecommunications System Design Considerations For Advanced Logistic Spacecraft, James Myron Romberg
Masters Theses
"The telecommunications system design goals and functional requirements for an advanced logistic spacecraft are presented qualitatively. Advanced equipment and techniques that meet these system requirements and goals, that are within the state-of-the-art and that are believed to be economically feasible, are enumerated and described. System emphasis is on unification to minimize RF links and antenna subsystems, and on use of functional redundancy to assure satisfactory performance of critical telecommunication functions. The interaction of the telecommunications system design and the spacecraft mechanical, environmental, electrical, and operational interfaces are described in qualitative and quantitative terms. A practical spectrum of system interface characteristics …
Further Investigation Of The Traveling-Wave Transistor, Robert J. Feugate
Further Investigation Of The Traveling-Wave Transistor, Robert J. Feugate
Masters Theses
"A brief introduction to the concept of a traveling-wave field-effect transistor is presented. Analytic solutions for certain lossless and lossy special cases are derived and a numerical method for solution of the general case developed. A possible computer program for implementing this numerically is given and utilized to compare the traveling-wave transistor to a conventional field-effect transistor amplifier"--Abstract, page ii.
Fast Neutron Effects On Transistor Scattering Parameters, David Leslie Gray
Fast Neutron Effects On Transistor Scattering Parameters, David Leslie Gray
Masters Theses
"It has not been possible in the past to characterize a transistor or other semiconductor device with regard to its performance in a fast neutron (E>10keV) environment when the device is operated at high (>100 MHz) frequencies. Using the scattering (s-) parameter concept, which regards a device as a two-port "black box", a full characterization of the trends in the neutron bombarded high-frequency performance of a typical transistor can be made. Scattering parameters are not only an accurate means of describing the high-frequency performance of any device, but are now reasonably easily measured with the advent on the …
A Synthesis Procedure Of Distributed Rc Parameter Networks, Chun-Ming Wen
A Synthesis Procedure Of Distributed Rc Parameter Networks, Chun-Ming Wen
Masters Theses
"Synthesis procedures for driving-point functions and transfer functions in the w plane are developed in this thesis. For driving-point functions and transfer functions which are single-valued in s, where s is the complex frequency variable, the synthesis procedures were derived from the extension of the O'Shea's trasformation [sic]. For the transfer functions which satisfy the stability theorem in the w plane, a synthesis procedure is developed by using a distributed-lag element (DL) or a uniform distributed RC (UDRC) network with matched terminations"--Abstract, page ii.
Study Of Diagnosability Of Binary Address Decoders, Girishchandra Mahendrakumar Gandhi
Study Of Diagnosability Of Binary Address Decoders, Girishchandra Mahendrakumar Gandhi
Masters Theses
"This paper studies the diagnosability of various types of binary address decoders. An attempt is made to develop a theory of diagnosis for logical faults that might occur in these logic nets. The developed theory is used to analyze these logic nets for various input combinations. Finally, the derivation of optimum diagnostic test sequences is considered"--Abstract, Page i.
Fault Diagnosis Of Sequential Circuits, Virgil Willis Hughes
Fault Diagnosis Of Sequential Circuits, Virgil Willis Hughes
Masters Theses
"Compared to the problem of combinational network (CN) diagnosis, that of sequential network (SN) diagnosis has been an extremely difficult one. Present techniques of SN diagnosis are difficult to apply, and generally lead to lengthy test schedules or additional logic. This paper presents a new approach to the SN diagnostic problem which results in a substantially simpler technique than those found in the literature. The approach is to modify the SN so that it can be diagnosed from a combinatoric point of view. This is accomplished by the addition of outputs for testing purposes to certain lines in the circuit--no …
Investigation Of Target Detection In Noncoherent Systems With Colored Noise, Edward Windsor Bailey
Investigation Of Target Detection In Noncoherent Systems With Colored Noise, Edward Windsor Bailey
Masters Theses
"Design efforts concerning the problem of detecting moving ground targets from an airborne platform with a noncoherent radar have been concentrated in the area of video filter design. The filter formulation generally follows an empirical path with no generally acceptable criterion for an optimum processor. This Thesis considers several problem formulations which are based on a Neyman-Pearson detection criteria. A square-law second detector is assumed and the resulting likelihood ratio shown to be too complex for closed form solution. The problem is reformulated in terms of sequences using complex random variable representations and the likelihood ratio is investigated. A test …
Failure Analysis Of Binary Address Decoders, Kanaiyalal Jekisondas Gandhi
Failure Analysis Of Binary Address Decoders, Kanaiyalal Jekisondas Gandhi
Masters Theses
"This paper describes the organization and failure analysis of various types of binary address decoders. Logical type faults are considered and all possible faulty output patterns, resulting from these faults, are derived. A basic theory is developed, showing that these failure patterns are independent of the decoder size and organization. Digital simulation programs were used as an aid in the development of this theory. Results of the simulation are provided in the appendix"--Abstract, page ii.
Computer-Aided Design Of Lossless Non-Uniform Transmission Lines, Larry Lee Wesner
Computer-Aided Design Of Lossless Non-Uniform Transmission Lines, Larry Lee Wesner
Masters Theses
"A numerical iterative design technique is presented for the synthesis of lossless non-uniform transmission lines. A variational approach is used to minimize an error functional to which the system and boundary equality constraints have been adjoined by Lagrangian multipliers. The resultant network optimization conditions lead to an iterative scheme requiring analysis of the non-uniform line, analysis of an adjoint system and calculation of the error gradient in parameter space. A steepest descent procedure is used to optimize parameter values. Finite difference equations are used to provide an approximation model for implementation on the digital computer. A design example and a …
A Digital Technique For Combining Frequency Standards, Lynn James Hawkey
A Digital Technique For Combining Frequency Standards, Lynn James Hawkey
Masters Theses
"A new technique for combining multiple frequency standards into a single timing reference based on the average of the frequency of each input is described. The uniqueness of this approach is that it is an all-digital scheme utilizing delay lines and high-speed logic elements currently available. The present and future applications of combiners are discussed, the requirements are highlighted, several digital solutions are briefly described, and the detailed block diagrams and characteristics of a particular general purpose combiner are presented. It is suggested that the optimum combiner include a stable quartz crystal oscillator with a frequency control feature. The output …
Current Characteristics Of Electrically Sprayed Glycerine, Larry Eugene Stoddard
Current Characteristics Of Electrically Sprayed Glycerine, Larry Eugene Stoddard
Masters Theses
"The current carried by electrically-sprayed glycerine was measured, and an empirical relation was obtained for single-jet spraying, given by I = KIV0.45M0.55̇d-0.18 where V is the electrode voltage, Ṁ the mass-flow rate, and d the electrode spacing, the electrodes being a capillary and collecting plate. Peculiarities of the current waveform, including an exponentially rising envelope, for unstable-jet spraying and multiple-jet spraying, were recorded"--Abstract, page ii.
Stochastic Simulations Analysis And Determination Of Iteration Requirements, James Walter Smith
Stochastic Simulations Analysis And Determination Of Iteration Requirements, James Walter Smith
Masters Theses
"A thorough analysis of computerized stochastic simulation problems has been undertaken to determine the number of iterations (or random draws) necessary to achieve a required degree of output accuracy. The basic problem is to determine when the sampled output mean and standard deviation are within specified accuracy limits. An error analysis is made of the statistical properties of deterministic-probablistic [sic] and logic (random walk) type problems. A recommendation for determining the number of problem iterations required is then presented"--Abstract, page ii.
An Analysis Of A Standardized Digital Circuit Driving A Coaxial Cable, John Pitkin Lappington
An Analysis Of A Standardized Digital Circuit Driving A Coaxial Cable, John Pitkin Lappington
Masters Theses
"The expense of developing new circuit designs has forced electronic manufacturers to develop and use multipurpose circuits that can be adapted to fit many requirements. Sometimes this procedure leads to problems that would not have occurred if a circuit, designed to fit a particular application, had been developed. One problem of this type deals with the effect of improperly terminated coaxial cables loading output signals from a digital computer. The unterminated cable reflected the signal back in the computer. This did not affect the putout stage, but the preceeding [sic] driving stage was affected. The degradation of the output of …
System Definition Of A Small, Economical General Purpose Computer, Thomas Elden Kreger
System Definition Of A Small, Economical General Purpose Computer, Thomas Elden Kreger
Masters Theses
"The major differences between commercially available electronic calculators and the small, general purpose computer are discussed. A computer system organization is proposed with low cost, physical compactness and user convenience as design objectives. In addition, a system block diagram and a set of micro-instructions are postulated. These micro-instructions are micro-programmed to provide floating point arithmetic capability and a library of function generating sub-routines"--Abstract, page ii.
An Investigation Of Transient Negative Resistance In A Cadmium Sulfide Device, John Irvin Giem
An Investigation Of Transient Negative Resistance In A Cadmium Sulfide Device, John Irvin Giem
Masters Theses
"An analysis has been made of a CdS device which exhibits a transient negative resistance at room temperature and low field strengths whereas previously reported cases of negative resistance in CdS were observed at low temperatures and moderate to high electric fields. The CdS bar was illuminated on one end in the vicinity of an ohmic In contact. Contact was made to the other end of the device with a rectifying Ag contact and the device was reverse biased. Experimental evidence and the analytical results both indicated that it is necessary that the material used to make the negative resistance …
State Assignments For Non-Normal Asynchronous Sequential Circuits, Gary Keith Maki
State Assignments For Non-Normal Asynchronous Sequential Circuits, Gary Keith Maki
Masters Theses
"There is a lack of procedures that can be used to find good internal state assignments for asynchronous sequential circuits operating in the non-normal mode. Presented here, are two generalized state assignments, which are functions only of the number of rows in a flow table. The suggested bounds for the generalized state assignments are m + [log₂m] and m + [m/2] internal state variables for a 2m-row flow table, where [ ] means "next lowest integer". Both generalized state assignments produce group (linear) codes. The algorithms for generating these internal state assignments are easy and straight-forward to implement. …
Neutron Induced Changes To The Modified Ebers-Moll Transistor Model Used In The Net-1 Program, Kenneth Robert Smith
Neutron Induced Changes To The Modified Ebers-Moll Transistor Model Used In The Net-1 Program, Kenneth Robert Smith
Masters Theses
"The development of theoretical and empirical relations which predict the permanent changes to the electrical characteristics of silicon transistors is described in this paper. Analytical techniques are also developed to obtain the parameters used in the Modified Ebers-Moll transistor model. The method employed is to determine the effects on externally measurable characteristics and to relate these changes to the parameters in the Modified Ebers-Moll transistor model. Further, all nonlinear characteristics are related to the independent variables with interpolating polynomials and degraded characteristics presented. then degraded characteristics are used to establish the parameters for and parameter changes to the transistor model …
Tunnel Diode Models For Electronic Circuit Analysis Program (Ecap), Carmon Dale Thiems
Tunnel Diode Models For Electronic Circuit Analysis Program (Ecap), Carmon Dale Thiems
Masters Theses
"In this paper ECAP models for the tunnel diode are presented. Results showing the model, the current-voltage charateristics [sic] are discussed. Operation in typical circuits is presented. A summary of the current state of the art in modeling appears in Appendix I. Since ECAP is only structured to accept piecewise-linear models of these devices, that type of model is presented here. All of the models are developed to approximate the typical tunnel diode current-voltage characteristic"--Introduction, page 1.
Design And Use Of A Universal Logic Circuit, Mahendrakumar Punjalal Shah
Design And Use Of A Universal Logic Circuit, Mahendrakumar Punjalal Shah
Masters Theses
"Yau and Tang have designed universal logic circuits (ULC's) of three variables with 8 I/O pins. They assumed that only one variable was available as a free input variable in its true and complementary form, the others were available as fixed input variables and the circuit generated true and complementary outputs. Their design required 22 I/O pins for a four-variable ULC, constructed from three variables ULCs. This paper decrived [sic] an algorithm for determining the input-pin connections, directly from the K-map of a given output function, for any n-variable ULC. Forslund and Waxman have designed a three-variable ULC using the …
A Design Oriented Digital Design Language, David Michael Rouse
A Design Oriented Digital Design Language, David Michael Rouse
Masters Theses
"A digital design language is presented here which is more consistent with the design sequence of digital computer than existing languages. An ideal design sequence is first investigated and the following desirable design language characteristics obtained. A good design oriented language must be: 1) multi-level, 2) capable of expressing ideas easily, 3) easily understood, 4) machine acceptable, 5) modular and, 6) capable of showing timing and control. It should also be: 1) independent of technology, 2) unrestricted to any particular structural feature such as serial processes, synchronous processes, etc., 3) concise, 4) precise, and 5) non-ambiguous. With regard to these …
A Lyapunov Designed Model-Referenced Control System With Signum Function Adaptive Control Laws, James Steven Epstein
A Lyapunov Designed Model-Referenced Control System With Signum Function Adaptive Control Laws, James Steven Epstein
Masters Theses
"An examination of a model-referenced adaptive control system designed to satisfy the requirements of Lyapunov's direct method is made. It is found that each adaptive control loop requires a multiplier for its implementation. A new design is proposed which replaces the multipliers in the control loops by switches, thereby gaining a significant hardware advantage. A first order system designed by the new method is simulated on an analog computer and some refinements are made. The method is then generalized to include nth order systems. The poles of the model, however, are subject to some restrictions. Finally, the problems associated with …