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

Issue 6 • Date Jan. 1955

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Displaying Results 1 - 25 of 27
  • Impedance and induced voltage measurements on iron conductors

    Publication Year: 1955, Page(s):577 - 581
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1177 KB)

    THE purpose of this paper is to provide data and from these to draw conclusions on three questions involving the flow of 60-cycle alternating currents in iron or steel structures. First, the paper will attempt to provide a simple empirical means of calculating the a-c impedance of iron or steel members. The application of these data for protective grounding and fault calculations will be presented... View full abstract»

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  • Techniques for measuring cascaded self-saturating magnetic-amplifier performance

    Publication Year: 1955, Page(s):581 - 584
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1699 KB)

    THE rapid development of magnetic amplifiers in recent years has led to the spending of much effort on their analysis and design criteria. Despite the progress made, a major part of the design must still be carried out experimentally. View full abstract»

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  • The biased rectifier amplifier ¿¿ A pulse magnetic amplifier

    Publication Year: 1955, Page(s):584 - 590
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1468 KB)

    THE biased rectifier amplifier (BRA) was developed to provide small, fast and high-gain magnetic amplifiers which operate from power frequencies such as 60 or 400 cycles. They operate from a pulse power supply and use a voltage source, such as a battery, in series with its rectifiers. They provide push-pull output with one core. View full abstract»

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  • Interoffice trunking and signaling

    Publication Year: 1955, Page(s):590 - 597
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1796 KB)

    EACH ENGINEER who for the first time concerns himself with the problems of telephone interoffice trunking discovers that practically the only source of information regarding equipment and operation comes from actual circuits and circuit description sheets which are not always available. This paper summarizes the information gained from a review of a number of trunk circuits with a view to providin... View full abstract»

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  • Single-ended saturable reactor circuit with quiescent current compensation

    Publication Year: 1955, Page(s):597 - 603
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3791 KB)

    This paper has been prepared to introduce a single-ended saturable reactor circuit which exhibits a transfer characteristic for which the d-c output is essentially a linear function of the d-c input for the entire design range of d-c inputs. This ¿to-zero¿ operation is shown to be the result of a unique combination of nonlinear characteristics of conventional devices, transformer and rectifier, ... View full abstract»

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  • Measurements of materials with high dielectric constant and conductivity at ultrahigh frequencies

    Publication Year: 1955, Page(s):603 - 607
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1089 KB)

    THE principles for measuring dielectric properties of materials at ultrahigh frequencies are well established.1,2 They are based on measurement of voltage standing wave ratio (VSWR) and location of the standing wave pattern, which results from reflection of electromagnetic waves in front of the sample; see Fig. 1. Transmission line or wave guide sections, depending upon frequency, are used to obta... View full abstract»

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  • A magnetically regulated portable battery charger

    Publication Year: 1955, Page(s):607 - 610
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1975 KB)

    IN CONNECTION with the development of military communications equipment for field application, a set of electrical and mechanical requirements was established for a regulated power supply for battery charging and floating service which was particularly unusual for equipment of this type. Mechanically, a portable unit was required with the size and weight to be kept to a minimum. At the same same, ... View full abstract»

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  • Saturating transformer reference circuit

    Publication Year: 1955, Page(s):610 - 616
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2998 KB)

    The theory of operation of a static magnetic reference device is described. Test results for a practical example show that an output of 15 ± 0.2 milliampere into a 50-ohm resistive load can be obtained for an input of 100 to 140 volts, 360 to 440 cycles per second, from ¿55 degrees centigrade (C) to + 100 C ambient temperature. The power input to the device is 5 watts. View full abstract»

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  • The transmission matrix of N alike cascaded networks

    Publication Year: 1955, Page(s):616 - 618
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (662 KB)

    The transmission matrix of N alike cascaded networks is derived without the help of advanced concepts or theorems of matrix algebra. Thereafter, a bridge is provided between this more modern approach and the older iterative-parameter theory. View full abstract»

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  • Acceleration plane method for analysis of a circuit with nonlinear inductance and nonlinear capacitance

    Publication Year: 1955, Page(s):619 - 626
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1410 KB)

    This paper analyses the transient behavior of a circuit with nonlinear resistance, inductance, and capacitance by the acceleration plane method developed recently by the author.1 The method as extended here is able to solve a nonlinear differential equation of the following type: ¿(x)x + f(x, x) + f1(x) = F(t). Five examples are given, with F(t) equal to a constant or a time function. Either ¿(x... View full abstract»

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  • Analysis of nonlinear coupled circuits

    Publication Year: 1955, Page(s):626 - 631
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1173 KB)

    The method of high-order phase planes1 or phase space is applied to the solution of nonlinear coupled circuits. Two simple examples are given to illustrate the application of this method. In the first example, a nonlinear resistance is introduced in the primary circuit. In the second example, a nonlinear inductance is used. It is possible to extend the application of the method to circuits with no... View full abstract»

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  • A comparison of metals and ferrites for high-speed pulse operation

    Publication Year: 1955, Page(s):631 - 635
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2115 KB)

    Metals and ferrites with rectangular hysteresis loops are used in magnetic amplifiers, switching networks, and data-storage systems. In these applications, the large-signal pulse response is most important. To reduce the effect of eddy currents, metals have been rolled to ultrathin gauge and high-resistivity ferrites have been used. By these techniques, eddy currents have been reduced to the point... View full abstract»

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  • An analogue computer technique using magnetic amplifiers

    Publication Year: 1955, Page(s):635 - 640
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1849 KB)

    THE foremost requirement to be met in the design of computers for operational use by the military services is that of providing adequate reliability of operation. Such equipment should have a mean life between failures of more than 6 months when operated under unfavorable environmental conditions. This degree of reliability is needed to insure that the equipment will inspire the user's confidence ... View full abstract»

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  • Some applications of semiconductor devices in the feedback loop of regulated metallic rectifiers

    Publication Year: 1955, Page(s):640 - 645
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1246 KB)

    TREMENDOUS advances have been made in semiconductor technology during the past 5 years. One of the many fields to benefit from this progress has been power rectification. The extended-area, germanium-junction diode is now a reality. The possibility of using silicon instead of germanium to provide greater freedom from ambient temperature limitations is being investigated. These new rectifying eleme... View full abstract»

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  • The suitability of the silicon alloy junction diode as a reference standard in regulated metallic rectifier circuits

    Publication Year: 1955, Page(s):645 - 651
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1462 KB)

    Regulated metallic rectifiers have been used throughout the Bell System to provide talking current, to power relays, switches, and vacuum-tube filaments; and to supply vacuum-tube plate potentials. With the advent of semiconductor devices such as transistors and junction diodes, the regulated metallic rectifier is assuming added importance. However, the lower voltages generally required by these s... View full abstract»

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  • A survey of magnetic recording

    Publication Year: 1955, Page(s):651 - 655
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1361 KB)

    THE understanding of magnetic recording and playback processes and the applications for magnetic recording have made considerable strides during the last 15 years. In the period of the early 1930's magnetic recorders had to operate with a recording-medium speed from 5 to 10 feet per second to secure a frequency response from 50 to 5,000 cycles per second. Today it is almost standard practice to ac... View full abstract»

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  • A new standard for direct current

    Publication Year: 1955, Page(s):655 - 658
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1641 KB)

    A practical standard for direct current has been developed and is incorporated into a high-accuracy measuring instrument. Utilizing the stability of a permanent magnet, this device may be stored and used under extreme conditions of temperature, and it is relatively insensitive to variation in operating conditions. View full abstract»

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  • Alteration of the dynamic response of magnetic amplifiers by feedback

    Publication Year: 1955, Page(s):658 - 665
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1664 KB)

    THE purpose of this paper is to explain and illustrate the use of feedback techniques in the alteration of the dynamic response of full-wave magnetic amplifiers with d-c outputs. A generalized sinusoidal transfer function for a single-stage magnetic amplifier with feedback through frequency sensitive elements is derived, and several examples are given of the application of the feedback method in s... View full abstract»

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  • Characteristics of the high-current argon arc with various electrode materials

    Publication Year: 1955, Page(s):665 - 670
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1466 KB)

    A study was made of the fundamental properties of the high-current d-c arc in argon at atmospheric pressure, at currents of 25 to 100 amperes and for various electrode materials. Spectroscopic observations were made on the arc, and data for the voltage-current and voltage-arc length characteristics were taken for all materials tested. Anode melting rates were determined for copper, iron, and titan... View full abstract»

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  • Some recent advances in the economy of routing calls in nation-wide toll dialing

    Publication Year: 1955, Page(s):670 - 679
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2417 KB)

    In the first part of the paper some of the important considerations in nation-wide toll switching are discussed. In the second part an arrangement in a new intertoll switching system is described which permits considerable simplifications in the equipment for the routing of toll calls. View full abstract»

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  • A rectifier algebra

    Publication Year: 1955, Page(s):679 - 682
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (809 KB)

    THIS paper presents an algebra that can aid in the simplification, the synthesis, and the understanding of circuits containing rectifiers and resistors. More specifically, it gives a method of rendering rectifier-resistor circuits into symbols with rules for manipulating these symbols. Here, in essence, an algebra is set up analogous to, but differing considerably from the well-known algebra of Sh... View full abstract»

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  • Magnetic characteristics pertinent to the operation of cores in self-saturating magnetic amplifiers

    Publication Year: 1955, Page(s):682 - 690
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2223 KB)

    A METHOD of measuring the magnetic characteristics which control the manner in which cores operate in self-saturating magnetic amplifiers is necessary for both economical production and accurate design of such amplifiers. It has been found1,2 that there is a lack of direct correlation between amplifier characteristics, such as gain, and either d-c or a-c major hysteresis loop measurements. The dif... View full abstract»

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  • A symbolic method for synthesis of 2-terminal switching circuits

    Publication Year: 1955, Page(s):690 - 693
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (866 KB)

    THE problem of synthesizing minimal switching circuits that satisfy any preassigned input condition is one that has of late received considerable attention. Analysis to date has tended to be dependent principally on methods derived from Boolean algebra. While such mathematics are not new, their development, especially as is applicable to the combinational switching problem, has not been comparable... View full abstract»

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  • Harmonic analysis for nonlinear characteristics

    Publication Year: 1955, Page(s):693 - 700
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1591 KB)

    Harmonic analysis may be carried out for nonlinear devices by the use of a set of polynomial functions applied directly to the nonlinear characteristic instead of by the more conventional use of trigonometric functions. Higher accuracy may sometimes be achieved in point-by-point calculations. A special method of representation shows how the form of the nonlinear characteristic affects its response... View full abstract»

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  • Analysis of magnetic amplifiers by the use of difference equations

    Publication Year: 1955, Page(s):700 - 711
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2475 KB)

    THIS paper explains and illustrates a new way of analyzing magnetic amplifiers through the use of difference equations, and it shows that this method of analysis leads to a different view of the mechanics of operation of the magnetic amplifier. It will be shown that all magnetic amplifiers operate upon the same basic principles, and that these basic principles are demonstrated by the operation of ... 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