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

Issue 6 • Jan. 1960

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Displaying Results 1 - 25 of 66
  • The use of D-C overpotential testing as a maintenance tool in the industrial plant

    Publication Year: 1960, Page(s):729 - 736
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3249 KB)

    Electric apparatus represents a large portion of the equipment required for productive activities in the industrial plant: generators to produce power; cables, transformers, and switch-gear for transmission and distribution; and motors for transforming electric energy into mechanical power. Insulation, the critical part of electric apparatus, has a limited service life, a variable depending upon t... View full abstract»

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  • Design of polyethylene-insulated multipair telephone cable

    Publication Year: 1960, Page(s):736 - 739
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1105 KB)

    Cables are designed to have special characteristics which will make them suitable for particular uses or purposes. In the case of telephone cable the purpose is primarily to transmit information at voice and carrier frequency during an expected life of approximately 30 years. To achieve this, certain mechanical and electrical characteristics must be built into the cable. Mechanical characteristics... View full abstract»

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  • Magnetic amplifier circuits - A classification of half-wave and full-wave nonreversible and reversible self-saturating circuits

    Publication Year: 1960, Page(s):739 - 751
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2366 KB)

    This article attempts to give an orderly, critical classification of a wide variety of self-saturating single-phase series-control magnetic-amplifier output circuits. It the article is successful, it will be clear that a confusing multitude of circuits appearing in the literature may be fitted into a very simple scheme. The relative merit of various alternative circuits for accomplishing different... View full abstract»

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  • A new dynamic impedance matching circuit as applied to a conference repeater

    Publication Year: 1960, Page(s):751 - 755
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1891 KB)

    Most telephone conversations are made between two parties. Occasionally the conversation may involve three parties, where the third party talks on an extension telephone. Another form of group conversation involves the interconnection of several telephone lines for a conference call. Here the lines are connected together in a conference circuit at the telephone exchange in a manner to provide opti... View full abstract»

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  • Theory of ferroresonance

    Publication Year: 1960, Page(s):755 - 763
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2311 KB)

    The phenomenon of hysteresis occurring in a series nonlinear resonant circuit has interested engineers for a long time. The phenomenon is associated in literature with a resonance occurring at a critical value of applied voltage where the nonlinear inductance, variable with the magnitude of the forcing function, reaches a value so as to resonate with the fixed capacitor. This is probably the reaso... View full abstract»

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  • A small high-speed transistor and ferrite-core memory system

    Publication Year: 1960, Page(s):763 - 769
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2713 KB)

    Memory for computer-type systems has received extensive study and design effort in the past few years. This effort has been directed mainly at producing faster, larger, and less expensive systems in the thousand-to mega-bit sizes. View full abstract»

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  • Status of sampled-data systems

    Publication Year: 1960, Page(s):769 - 777
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4098 KB)

    This paper briefly describes in general terms procedures for analysis and methods of synthesis of sampled-data systems and indicates present areas of research and some of the important problems to be tackled in this field. View full abstract»

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  • Considerations pertaining to the design of an electronic telephone switching system

    Publication Year: 1960, Page(s):777 - 786
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2322 KB)

    The U. S. army signal Corps required a basic telephone switching system which could fulfill the functions of a local central office and provide the basis for a long distance (LD) switching center. In addition, a complete switching network was required, built up of a series of local and LD switchboards. View full abstract»

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  • Mixed transcendental and polynomial transforms

    Publication Year: 1960, Page(s):786 - 795
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2130 KB)

    There are a variety of engineering applications in which the dynamics of the equipment being used or designed are expressible by a Laplace transform which contains both polynomial functions of s and exponential functions. In networks and in feedback control systems, transcendental terms in the Laplace transform arise due to diffusion in a transistor, dead time or time of flow of materials in heat ... View full abstract»

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  • Simulation of data-switching systems on a digital computer

    Publication Year: 1960, Page(s):796 - 800
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1476 KB)

    Since 1941 automatic data-message-switching systems using teletypewriter techniques have been widely used to transmit messages from each of a multiplicity of sources to destinations in accordance with address codes included in each message.1 Existing systems have increased in size and complexity along with the business operations which they serve. Future data-message-switching systems show promise... View full abstract»

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  • Microwave systems on the pacific great eastern railway

    Publication Year: 1960, Page(s):800 - 806
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6958 KB)

    Existing microwave systems on the Pacific Great Eastern Railway have been depicted on the railway route map. See Fig. 1. View full abstract»

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  • An approach to the study of automatic target tracking

    Publication Year: 1960, Page(s):806 - 811
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1773 KB)

    Several problems encountered in the design of automatic processing systems for data obtained from search radars give rise to a requirement for the prediction of the present or future position of a target on the basis of past position reports. The most obvious of such problems is that of scan-to-scan correlation of target reports. Here the prediction of the present position of the target determines... View full abstract»

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  • Global public telephone service - 1958

    Publication Year: 1960, Page(s):811 - 817
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3459 KB)

    At the symposium on global Communications in Washington, D. C., in June of 1954, Mr. Donald of the American Telephone and Telegraph Company-presented a paper discussing the global public telephone service as provided by that company. It is proposed here to review some aspects of public telephone service in the light of the important developments that have taken place since then. View full abstract»

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  • Design parameters for optimizing the efficiency of thermoelectric generators utilizing p-type and n-type lead telluride

    Publication Year: 1960, Page(s):817 - 820
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1100 KB)

    Thermoelectric generators are presently being developed for many uses which range from small flame-operated power supplies for automatic control systems to several kilowatt-size thermopiles for prototype evaluation of marine propulsion systems.1 This renewal of interest in thermoelectric power generation and thermoelectric heat pumping is based on recent advances in the development of special semi... View full abstract»

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  • The flagstaff-phoenix tj radio system

    Publication Year: 1960, Page(s):821 - 826
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5860 KB)

    The bell telephone laboratories, inc., have recently completed the development of a microwave radio system to operate in the 11-kmc (kilomegacycle) band. The system is coded TJ and is designed for short-haul and medium-haul systems. One of the first systems was installed between Flagstaff and Phoenix, Ariz. It is hoped that a description of the system may be of interest to other engineers in the c... View full abstract»

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  • A transistorized pulse code repeater

    Publication Year: 1960, Page(s):826 - 830
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1906 KB)

    Two methods are available for the simultaneous transmission of several telephone conversations on the same radio beam or cable. These are frequency division multiplex (FDM) in which different conversations are assigned different portions of the electromagnetic spectrum, and pulse time modulation (PTM) in which different conversations are sampled at intervals and the samples interleaved in time for... View full abstract»

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  • Recurrence relations in the solution of a certain class of nonlinear systems

    Publication Year: 1960, Page(s):830 - 834
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1295 KB)

    This paper (a modified version of the material in an unpublished paper of the same name by the author presented at the AIEE 1957 Summer General Meeting) introduces aspects of a generalized mathematical theory for the analysis of a certain class of nonlinear systems. (Since the original presentation of this paper other work has appeared,1??5 which enlarges on the comments made here and extends the ... View full abstract»

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  • A magnetic-amplifier - Silicon-transistor power supply for missile application

    Publication Year: 1960, Page(s):835 - 843
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3163 KB)

    The recent development of the first truly high-power silicon transistor and the demand for high-efficiency, regulated, solid-state power supplies have stimulated interest in silicon-transistor-magnetic-amplifier combinations. Apart from the usual ability of silicon devices to survive a higher temperature than their germanium counterparts, the new transistors, due to the high-voltage ratings and lo... View full abstract»

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  • D-C charged magnetic pulse modulator

    Publication Year: 1960, Page(s):843 - 850
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3040 KB)

    An a-c charged magnetic pulse modulator consisting of a resonant charging stage and several successive pulse-modulating stages is the subject of a paper by W. S. Melville.1 These pulse-modulating stages employ saturable reactors used as switching elements, and a series of capacitors. This modulator, if designed for a high-pulse repetition frequency, requires a separate frequency converting device ... View full abstract»

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  • Analysis of magnetic amplifiers using a resistive reactor model

    Publication Year: 1960, Page(s):850 - 857
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1949 KB)

    The lack of a simple and reasonably accurate model for the behavior of magnetic materials has been the major source of difficulty in all the attempts to analyse and predict the behavior of magnetic amplifiers. In several cases, even a qualitative understanding of the operation of certain circuits was impossible to achieve because of the lack of such a model. View full abstract»

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  • Elimination of coupling problems in multistage magnetic amplifiers

    Publication Year: 1960, Page(s):858 - 863
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1386 KB)

    When two or more magnetic amplifiers are cascaded, it is generally found that the over-all characteristic cannot be accurately predicted from the individual stages. The cascaded gain is less than the product of the separate gains. There may be abrupt changes in the slope of the cascaded control characteristic, and sometimes ??snap-action?? occurs. The over-all transfer function has a time constant... View full abstract»

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  • Miniature high-frequency magnetic amplifiers for magnetic memory sensing

    Publication Year: 1960, Page(s):863 - 872
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4880 KB)

    Amplifiers of the magnetic modulator type have been found useful for amplifying signals as small as 10??13 to 10??17 watts.1,2 The most common design utilizes balanced cores and a flux coupled output circuit separate from the excitation circuit. The output is the difference output of the cores and is predominantly second harmonic in content. The zero drift is small because core unbalance results o... View full abstract»

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  • A mathematical model for a magnetic-amplifier reactor core

    Publication Year: 1960, Page(s):872 - 878
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1912 KB)

    In the analysis and design of self-saturating magnetic amplifiers, the flux-resetting characteristics of the saturable reactors must be known either analytically or graphically. In the past, the reactor flux-resetting characteristic has been represented by a single, unique relation between flux and resetting magnetomotive force.1??3 Such a restrictive reactor representation has limited usefulness ... View full abstract»

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  • Theory of 3-phase bridge magnetic amplifier: I -Steady state

    Publication Year: 1960, Page(s):878 - 895
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3915 KB)

    The primary object of this paper is to develop a theory for the 3-phase bridge magnetic amplifier. A further object is to describe the utilization of this theory to arrive at design and performance equations which are sufficiently simple and accurate for engineering purposes. Part I deals with the steady-state operation, and Part II (which is planned for future publication) with the transient perf... View full abstract»

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  • Two-step switching of saturable reactors

    Publication Year: 1960, Page(s):895 - 900
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1402 KB)

    The fundamental problem in the analysis and design of magnetic amplifiers is the determination of the unsaturated impedance of the reactor by some test less specialized than insertion in the actual circuit. For tape and ferrite cores driven by very large currents, such as are encountered in computer applications, fairly successful approaches have been developed, although they are still incapable o... 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