By Topic

Education, IEEE Transactions on

Issue 3 • Date Sept. 1969

Filter Results

Displaying Results 1 - 19 of 19
  • Table of contents

    Page(s): c1
    Save to Project icon | Request Permissions | PDF file iconPDF (76 KB)  
    Freely Available from IEEE
  • IEEE Education Group

    Page(s): c2
    Save to Project icon | Request Permissions | PDF file iconPDF (116 KB)  
    Freely Available from IEEE
  • Introduction

    Page(s): 149
    Save to Project icon | Request Permissions | PDF file iconPDF (1109 KB)  
    Freely Available from IEEE
  • Table of contents

    Page(s): 150
    Save to Project icon | Request Permissions | PDF file iconPDF (77 KB)  
    Freely Available from IEEE
  • Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Regional Approach for Computer-Aided Transistor Design

    Page(s): 152 - 161
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1820 KB)  

    A regional approach to transistor design is presented which makes possible the determination of transistor gain hFE for any transistor (doping profile specified) operating at any given values of emitter current IE and collector-to-emitter voltage VCE. This approach extends the classical diffusion theory of transistors to include conductivity modulation, voltage-controlled base motion, and current-controlled base motion (base widening). Due to the simplicity of this technique, time-sharing computer techniques were used. This allowed for user interaction, making this approach very attractive for education as well as design. The regional approach is a likely candidate for satisfying the needs for the device designer (it contains device performance versus doping profile), the circuit designer (it allows determination of equivalent circuit models from knowledge of the electron and hole densities throughout the device), and the academic world (it is simple and physical). It is anticipated that the regional approach will allow engineers to develop a "feel" for transistor behavior under wide ranges of operating conditions. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Linear Circuit Models Derived via Computer Optimization

    Page(s): 162 - 169
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1108 KB)  

    To make more efficient use of the computer as an aid in obtaining linear small signal circuit models, a method of successive approximation is presented and used to obtain a variety of circuit models. Several useful search strategies are presented and specific examples illustrate their use in deriving better approximations from an initial starting point. The relative merits of various search strategies are compared to furnish guidelines for future use. The modeling techniques are also applied to specific resistor and transistor characterization problems. The hybrid-pi model for the transistor is developed in a way which allows considerable flexibility in the inclusion of parasitic effects. A final example models a practical amplifier at frequencies up to UHF. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Black-Box Models for Linear Integrated Circuits

    Page(s): 170 - 180
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1499 KB)  

    The paper presents a general approach to the modeling of linear integrated circuits for computer-aided analysis in the frequency domain. The modeling is done through black boxes whose internal details are ignored and which are characterized only at their external terminals. Lumped and distributed, ideal and experimentally characterized multiterminal devices can be handled. The mathematical characterization is the indefinite admittance matrix. The implementation of the methods discussed is very simple, since no topological matrices are required. The method lends itself to analyzing large circuits by tearing them and then reconnecting the pieces. The method has been implemented in a program entitled BELNAP. A transient counterpart BELTIP and a design program IMPROVE have been in use by designers at Bell Laboratories for some time. An example circuit is solved in detail in the paper using BELNAP. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Circuit Models for Transformers

    Page(s): 181 - 188
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1211 KB)  

    Circuit models are developed from the physical behavior of transformers. The models contain passive elements and controlled sources which are directly useful in computer analysis programs, and which the designer can use a readily as transistor and vacuum-tube models. Linear models are developed for ideal and perfect transformers and for lossy transformers. A piecewise linear model is developed for saturable reactors. The development is carried out for the generalized n-winding transformer. The parameters of the circuit model are related to winding and core parameters to facilitate transformer selection and design. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Modeling and Simulation of a Tunnel Diode Motor

    Page(s): 189 - 196
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1203 KB)  

    A simple electromechanical device called a tunnel diode motor was described in the "Amateur Scientist" section of the Scientific American [1]. From the construction details presented there a prototype was built with the idea that this would make a good example for the classroom. It has since been used twice in a graduate level course in digital computer simulation. This device has served well to illustrate typical problems in modeling and the automatic numerical solution of model equations. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Full text access may be available. Click article title to sign in or learn about subscription options.
  • Circuit Design Application of the Michigan Terminal System

    Page(s): 198 - 202
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1940 KB)  

    The student use of batch on-line teletypewriter and graphical display facilities for circuit design at the University of Michigan is discussed. This includes batch use of GCA programs, teletypewriter use at the elementary algorithmic level, and display use for man-machine and automatic iterative design. Focus is placed on the economics of each level of design and on student reactions. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Computer-Oriented Sophomore Course on Nonlinear Circuit Analysis

    Page(s): 202 - 208
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1186 KB)  

    This paper describes the philosophy, application, and implementation of a collection of FORTRAN IV computer programs currently being used in a sophomore course on nonlinear circuit analysis at Purdue University. Since these programs were developed from the education rather than the user point of view, some of them were deliberately designed in the form of a series of subroutines, and were stored in a common disk file. These subroutines and programs are used to analyze a large class of nonlinear electronic circuits such as waveshaping networks, multivibrators, time-base generators, etc. Since the computer is used to take over only the nonconceptual but otherwise very time-consuming task, the students were found to be much more receptive and motivated in learning new concepts. The results reported in this paper are based on the experiences and reactions of approximately 150 students using the batch-processing mode. A short description, however, is also given on a forthcoming experiment to be conducted at Purdue University on the merits of using an on-line graphic display console. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Student Experience with Interactive Computer Programs for Linear Circuit Design

    Page(s): 208 - 212
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (908 KB)  

    Computer programs which allow interactionbetweenthe user and the machine in the design of linear circuits have been used by students of a graduate course in computer-aided circuit design. These programs, which enable the determination of circuit element nominal values to realize responses within specified constraints, have been operated both with batch processing and on-line through commercial time sharing utilities. Student experience with each mode of operation is described, including student reaction, relative gains through each type of operation, problems encountered, and exportability of this work to other schools and machines. Use of a typical interactive program for on-line design of an ac circuit is described in detail. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Use of On-Line Graphical Computer Systems for Student Research

    Page(s): 213 - 216
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2833 KB)  

    The purpose of this paper is to point out the advantages and disadvantages of using an on-line graphical computer for graduate student research. The system itself consists of an IBM 2250 model I graphic console operating through IBM 360/40,/75, and /91 computers. It was hoped that this would provide an interactive graphical system permitting the student to solve his dissertation problems in a novel fashion. The experience gained in this endeavor and the methodology which the student might develop could prove to be even more valuable than the solution of the problem itself and would constitute an integral part of his thesis. The paper reports on the work carried out for a Master's thesis and for a Ph. D. dissertation. The former consisted of an attempt to solve nonlinear programming problems in n dimensions by searching for the optima on a CRT screen exhibiting contour lines and constraints in two variables, the others being varied by on-line control. The other application consisted of developing a simulation language allowing for on-line graphical displays and interaction, and applying this language to the design and analysis of a complex digital computer system consisting, in particular, of a variable number of time shared consoles. The results of this work clearly showed the convenience of an interactive graphic system while underlining the difficulties experienced in operating either with an inherently slow system or a powerful system slowed down by batch background operation. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Teaching of Transistor Circuit Design Using a Digital Computer

    Page(s): 216 - 219
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (772 KB)  

    The availability of rapid on-line computational facilities has forced a major revision of our course on multistage transistor amplifiers. Approximate methods of analysis are now no longer helpful: the exact gain and bandwidth can be readily calculated on a computer. However, previously derived approximate relations for bandwidth can be inverted to provide excellent first-order design equations. The resulting first-cut design can then be checked on a computer and modified, if necessary, to more closely meet the design specifications. By using a time-shared computer facility (APL) 1 we have been able for the first time to involve the students in a meaningful and exciting way in the design of sophisticated multistage transistor amplifiers. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Computer-Flavored Circuit Theory

    Page(s): 219 - 222
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1856 KB)  

    The objective in the courses described herein was to teach circuit analysis, optimization, and design in a way that recognizes the important role of computers, but does not become overpowered by the myriad subtleties and irrationalities of real-world computers. This paper discusses the author's experience in using existing interactive computer facilities to teach graduate and undergraduate circuits subjects, and suggests promising directions in which to go and not to go. Questions raised concern the role of omnibus circuit analysis programs, if any, how to teach numerical analysis without quite, time-sharing economics, and the use of a computer in teaching machine mode someday. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Contributors

    Page(s): 222 - 224
    Save to Project icon | Request Permissions | PDF file iconPDF (3535 KB)  
    Freely Available from IEEE
  • Information for authors

    Page(s): 224a
    Save to Project icon | Request Permissions | PDF file iconPDF (45 KB)  
    Freely Available from IEEE

Aims & Scope

Educational research, methods, materials, programs, and technology in electrical engineering, computer engineering, and fields within the scope of interest of IEEE.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Jeffrey E. Froyd
Texas A&M University