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Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics

Issue 3 • Date July 1956

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Displaying Results 1 - 17 of 17
  • Nontracking organic insulations

    Publication Year: 1956, Page(s):257 - 261
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4465 KB)

    A novel principle has been discovered which retards or completely eliminates the formation of conducting decomposition products in organic materials exposed to electric discharges. The application of this principle to several organic insulation materials has greatly increased their ability to withstand electric arcing. View full abstract»

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  • Transformer reactance calculations with digital computers

    Publication Year: 1956, Page(s):261 - 267
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (550 KB)

    SINCE one of the important features of a transformer is its series or leakage impedance, improvements in the calculation of this quantity are always searched for. In power transformers this impedance is almost all formed by its reactive component so that the accuracy of the impedance calculation hinges on the accuracy of the leakage reactance calculation. Modern methods of calculation using digita... View full abstract»

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  • Flux reversal in magnetic amplifier cores

    Publication Year: 1956, Page(s):268 - 278
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4008 KB)

    IN RECENT years theun derstanding magnetic amplifier circuits has advanced rapidly, and great strides have been made in the art. However, it is recognized that several aspects of magnetic amplifier operation still need clarification. In most instances, the lack of a satisfactory explanation for certain circuit characteristics can be traced to an incomplete understanding of the behavior of the magn... View full abstract»

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  • Several-valued combinational switching circuits

    Publication Year: 1956, Page(s):278 - 283
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1175 KB)

    SINCE the introduction of symbolic methods1,2 into the field of digital control, much has been written on the application of Boolean algebra to the analysis and synthesis of 2-terminal electromagnetic (relay and magnetic core) and electronic switching networks. In general, a switching network involves not only the network configuration and the switching elements but also the states of transmission... View full abstract»

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  • Hysteresis loops in dielectric amplifiers

    Publication Year: 1956, Page(s):283 - 289
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (599 KB)

    DIELECTRIC amplifiers are circuits which utilize the nonlinear characteristics of capacitors made with so-called ferroelectric materials as dielectrics. To predict the performance of a dielectric amplifier, the behavior of the nonlinear capacitor must be determined and some means of representing it analytically must be devised. The purpose of this paper is to investigate the behavior of a commonly... View full abstract»

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  • Power transistor switching circuit

    Publication Year: 1956, Page(s):290 - 296
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1162 KB)

    TO STUDY power transistor switching circuits, it is necessary to measure relevant d-c transistor parameters as functions of current and temperature. Based on the measured results, design methods can be developed for high-power bistable switching circuits which have good trigger sensitivity and d-c stability over wide temperature ranges. View full abstract»

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  • Analysis of instability and response of reactors with rectangular hysteresis loop core material in series with capacitors

    Publication Year: 1956, Page(s):296 - 307
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2811 KB)

    An exact analysis is given for a reactor having an idealized magnetization characteristic consisting of two linear regions of zero inductance, interrupted by a linear region of infinite inductance, when connected in series with a load comprising of capacitance and resistance under the action of a sinusoidal applied voltage. The recent developments in core materials have introduced magnetic materia... View full abstract»

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  • Low-impedance operational characteristics of toroidal cores used in magnetic amplifiers

    Publication Year: 1956, Page(s):307 - 313
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3587 KB)

    The need for knowing the low-impedance operating characteristics of a toroidal core or cores to be used in a magnetic amplifier operating under low-impedance control conditions is shown in this paper. A method is then presented for determining these low-impedance characteristics without first winding turns on the core. This method is presented for the edification of persons who are working on the ... View full abstract»

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  • A new 4-channel open-wire carrier system employing transistors

    Publication Year: 1956, Page(s):314 - 322
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3127 KB)

    AMONG independent telephone companies, Bell System operating companies, and railroad communications systems, carrier is used to exploit fully the vast mileage of open-wire telephone plant. Consistent with circuit needs, wire lines were first used to transmit voice-frequency circuits and, later, with added transpositions, to transmit carrier circuits employing frequencies to about 35 kc. Even now, ... View full abstract»

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  • Field effect transistor applications

    Publication Year: 1956, Page(s):323 - 329
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1192 KB)

    A field effect transistor1 is a unipolar device, distinguishable from a junction transistor in the following two ways: 1. the current flow is carried predominantly by one type of carrier alone; and 2. the electric field intensity is relatively high, thus the current flow is caused by field drift instead of by diffusion. Fig. 1(A) shows the construction of a field effect transistor. It consists of ... View full abstract»

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  • The Wisconsin integrally synchronized computer ¿¿ A University research project

    Publication Year: 1956, Page(s):330 - 338
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3414 KB)

    IN THE fall of 1950, the University of Wisconsin began research in the design and construction of an automatic electronic digital computer to add to its servomechanism, analogue, and digital computer program. The project was undertaken for two reasons: 1. to obtain an additional research tool to supplement existing computing facilities such as the International Business Machines equipment operated... View full abstract»

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  • Transistor analogue computing amplifiers for flight simulators

    Publication Year: 1956, Page(s):338 - 342
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1473 KB)

    A WIDELY used flight-simulation method for flight trainers is the use of an analogue computing system employing a modulated 400-cycle-per-second (cps) carrier. A recent paper1 described four basic computing components that have been developed for use in computing systems of this type. Two of these components are vacuum-tube amplifiers. These are: 1. a summing amplifier of the voltage feedback type... View full abstract»

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  • Development of transcontinental communications in Canada

    Publication Year: 1956, Page(s):342 - 352
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5492 KB)

    THERE are three major communication agencies in Canada. The Trans-Canada Telephone System furnishes long-distance telephone service to the public across Canada and also provides privately leased telephone and telegraph circuits. The Canadian Pacific Railway Company and the Canadian National Railways each furnish commercial telegraph service throughout Canada, and they also provide a number of priv... View full abstract»

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  • Design of electronic equipment for radio-interference reduction

    Publication Year: 1956, Page(s):352 - 357
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1272 KB)

    During a survey recently conducted for the U. S. Army, Navy, and Air Force, it was found that the control of radio interference was a serious problem to both designers of electronic equipment and to the military operational activities. Some of the critical areas of design that have affected equipment and system performance in the field are discussed herein. Several types of electronic equipment fo... View full abstract»

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  • Method of measuring spot size of cathode-ray tube

    Publication Year: 1956, Page(s):357 - 359
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (929 KB)

    THE determination of the spot size of a cathode-ray tube has been, at best, a subjective process. Thus, the shrinking-raster method of measuring spot size relies on the judgment of the observer to determine when a set of lines appears to merge. Similarly, any attempt to measure the spot diameter with a microscope is also dependent upon the observer because of the way the flux density varies over t... View full abstract»

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  • Two new total radiation pyrometers

    Publication Year: 1956, Page(s):360 - 367
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2580 KB)

    The measurement and control of temperature are basic to all industrial processes. Modern automatic machinery exploits the economy achieved by a continuous flow of product. Such machinery requires instrumentation capable of measuring the temperature of moving material in process for maximum efficiency. Total radiation pyrometers are useful for this purpose, and there is a continuing demand from ind... View full abstract»

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  • Transistor power amplifiers with switched mode of operation

    Publication Year: 1956, Page(s):368 - 372
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (953 KB)

    A CONVENTIONAL circuit for class B power amplification with transistors is shown in Fig. 1(A). The two transistors (p-n-p) are connected in the common emitter arrangement and in the absence of signal are quiescent at a point on the output characteristics such as P in Fig. 1(B). When a sinusoidal voltage signal is applied as base drive, the transistors operate on a load line such as PQ in alternate... View full abstract»

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Aims & Scope

This Transactions ceased publication in 1963. The current retitled publication is  IEEE Transactions on Communications.

Full Aims & Scope