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

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  • 1. Eddy-current losses in solid and laminated iron

    Publication Year: 1959, Page(s):169 - 181
    Cited by:  Papers (89)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3427 KB)

    In this paper formulas are developed, on the basis of simple physical conceptions, for the calculation of eddy currents in solid and laminated iron, which, as the experiments presented show, enable the losses caused by eddy currents to be predicted with surprising accuracy. A simple formula for the calculation of the power factor (pf) that the magnetic circuit reflects into the magnetizing winding... View full abstract»

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  • 2. The duobinary technique for high-speed data transmission

    Publication Year: 1963, Page(s):214 - 218
    Cited by:  Papers (19)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2507 KB)

    A new data transmission technique has been evolved, which has the speed capability of the quaternary systems and, at the same time, promising performance. An important advantage of this technique is that the amount of circuitry required and the degree of complexity are relatively low, being not much more than for a straight binary system and much less than for a typical quaternary system. The proc... View full abstract»

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  • 3. Impedance of thin-wire loop antennas

    Publication Year: 1956, Page(s):606 - 619
    Cited by:  Papers (46)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1868 KB)

    THE THIN-wire loop is one of the first antennas to receive theoretical consideration, having been discussed by Pocklington1 in 1897. Pocklington treated a closed loop excited by a plane wave; he obtained an exact solution for the current on the loop in the form of a Fourier series. More recently, Hallén2 considered a driven loop and obtained a solution, again in the form of a Fourier series, for ... View full abstract»

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  • 4. The charging of small particles for electrostatic precipitation

    Publication Year: 1957, Page(s):300 - 306
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (753 KB)

    CHARGING CONDITIONS and particle size are important factors in electrostatic gas cleaning. Particle mobility, the rate at which the particle moves in an electric field of unit strength, is a function of the charge and size of the particle. The minimum mobility and the particle size at which it occurs, are functions of the charging conditions. View full abstract»

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  • 5. Movement of air in the electric wind of the corona discharge

    Publication Year: 1961, Page(s):143 - 150
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2544 KB)

    The mechanism of gas movement in the electric wind is considered herein, and an approximate theory presented which relates relevant electrical and aerodynamic quantities. Among others, these relationships are shown to hold for an electrostatic blower, operating on the electric-wind principle: Gas velocity is a linear function of voltage and is proportional to the square root of current; if the den... View full abstract»

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  • 6. A theory for space-charge-limited currents with application to electrical precipitation

    Publication Year: 1960, Page(s):47 - 50
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (738 KB)

    The flow of steady electric currents in the interior of any medium is governed by three laws 1. Poisson's law which essentially relates space charge to potential. 2. Conservation of charge. 3. A law of the type of Ohm's law connecting current flow and potential gradient. In most solid and liquid conductors of technical interest, Poisson's law can be satisfactorily approximated by the simpler equat... View full abstract»

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  • 7. The theory of a single-ring circular antenna array

    Publication Year: 1961, Page(s):110 - 115
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1696 KB)

    The single-ring circular antenna array of axial dipoles is analyzed in this paper. Such an array consists of m parallel dipoles, equally spaced on the circumference of a circle whose radius is ¿. The two principal properties with which a designer is concerned are (1) the radiation pattern and (2) the impedance of each element in an array, both of which can be found if the current distribution alo... View full abstract»

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  • 8. Transformer reactance calculations with digital computers

    Publication Year: 1956, Page(s):261 - 267
    Cited by:  Papers (23)
    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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  • 9. Influence of A-C reactance on voltage regulation of 6-phase rectifiers

    Publication Year: 1953, Page(s):244 - 253
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7786 KB)

    INVESTIGATIONS made during the past few years have shown that methods normally used for the calculation of rectifier voltage regulation have definite limitations not generally appreciated by application engineers. It has been established that conventional methods of calculating regulation are valid only if the angle of overlap is less than 300 degrees divided by the number of phases. With larger o... View full abstract»

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  • 10. Shielding of communication cables

    Publication Year: 1955, Page(s):378 - 387
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2268 KB)

    IN THE course of designing and manufacturing electric cables, the need for shielding frequently arises, sometimes because of inductive interference and sometimes because of high-voltage considerations. This discussion is confined to relatively low-voltage cables where inductive interference is the problem. View full abstract»

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  • 11. A switching transistor D-C to A-C converter having an output frequency proportional to the D-C input voltage

    Publication Year: 1955, Page(s):322 - 326
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1193 KB)

    THE combination of transistors and transformers constructed of square hysteresis loop material has produced much useful circuitry outside of the realm of magnetic amplifiers per se. In this paper a highly efficient and extremely precise converter for transforming direct to alternating current, yielding a square-wave output whose frequency is proportional to the d-c input voltage, will be described... View full abstract»

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  • 12. Measurement of the complex dielectric constant of very-high-dielectric-constant materials at microwave frequencies

    Publication Year: 1957, Page(s):225 - 228
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (522 KB)

    THE MEASUREMENT of the complex dielectric constant of very-high-dielectric-constant materials at microwave frequencies is considerably more difficult than the measurement of materials with a low dielectric constant. The reason for this can be best illustrated by consideration of a commonly used method of measuring dielectric constant at microwave frequencies which is called the short-circuited lin... View full abstract»

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  • 13. PAM, PDM, and PCM techniques in application to digital telemetry on voice bandwidth facilities

    Publication Year: 1963, Page(s):139 - 151
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3003 KB)

    PAM, PDM, and PCM techniques, and their applicaion to digital telemetry are discussed. The requirements of these telemetry modes in terms of link conditions, tone equipment, and terminal equipment is examined. Conclusions are reached regarding adaptability to high speed, multiplexing, and hardware requirements. View full abstract»

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  • 14. Accurate determination of the capacitance of a thin rectangular plate

    Publication Year: 1957, Page(s):761 - 766
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1208 KB)

    THE PURPOSE of this paper is two fold: to determine by the method of subareas the charge distribution and capacitance of a rectangular area; and to advance therefrom a universal curve which furnishes accurate values of the capacitance of a rectangular area of any specified dimensions. From well-known theory, rigorous determination of these electrical quantities hinges on determination of the corre... View full abstract»

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  • 15. Design of long passive oscilloscope probes to simplify maintenance of large digital computers

    Publication Year: 1957, Page(s):359 - 362
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (421 KB)

    THE cathode-ray oscilloscope is a powerful tool for the maintenance of digital computers, but its use on a mobile cart is often awkward and does not permit the oscilloscope to be used to its fullest advantage. If, however, the oscilloscope could be permanently mounted at the maintenance console and supplied with signals from a network of long probe lines running into the computer, operators at the... View full abstract»

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  • 16. Kineplex, a bandwidth-efficient binary transmission system

    Publication Year: 1958, Page(s):723 - 728
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (545 KB)

    SINCE WORLD WAR II, thousands of medium and large-scale scientific and business data-processing computers have been placed in governmental and industrial service throughout the country. With this growth has come the inevitable marriage of computing machinery to wire and radio communications. The need for more reliable and efficient forms of data communications is at the present time greater than e... View full abstract»

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  • 17. The map method for synthesis of combinational logic circuits

    Publication Year: 1953, Page(s):593 - 599
    Cited by:  Papers (113)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5354 KB)

    THE SEARCH for simple abstract techniques to be applied to the design of switching systems is still, despite some recent advances, in its early stages. The problem in this area which has been attacked most energetically is that of the synthesis of efficient combinational that is, nonsequential, logic circuits. View full abstract»

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  • 18. The development of the current comparator, a high-accuracy A-C ratio measuring device

    Publication Year: 1962, Page(s):359 - 368
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5196 KB)

    The current comparator is a stable, sensitive, and reliable magnetic device, which may be used for a-c ratio measurements of high accuracy. The sources of error in such a device are discussed, and methods are proposed for minimizing their effect. The design of a 2,000-amp (ampere) feed-through current comparator based on these investigations is described, and test results are given which indicate ... View full abstract»

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  • 19. Logic for applying topological methods to electric networks

    Publication Year: 1958, Page(s):657 - 667
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2310 KB)

    The determination of the behavior of large electric networks confronts the engineer or mathematician with the necessity of solving a large number of equilibrium equations determined by the network and the restraints imposed on it. This task has been sufficiently formidable to bring about the development and construction of large analog computers such as the d-c and a-c network calculators. In rece... View full abstract»

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  • 20. The ring-core magnetometer ¿¿ A new type of second-harmonic flux-gate magnetometer

    Publication Year: 1962, Page(s):65 - 73
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3286 KB)

    A new type of flux-gate element employing an ordinary toroidal core without air-gap has been developed. By using tape-wound or laminated nickel-iron-alloy ring cores ¿¿ ID-OD (inside diameter-outside diameter) ratio in the range from 0.85 to 0.98; mean diameter 0.5 to 1.5 in. (inches), or less ¿¿ with semicircularly wound and differentially connected second-harmonic detector windings, a sensitivit... View full abstract»

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  • 21. The analysis of redundancy networks

    Publication Year: 1958, Page(s):627 - 632
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1104 KB)

    Electrical and electronic engineers are familiar with the impedance concepts of electric networks. In such networks the parameters of interest are impedances, admittances, currents, voltages, and other related attributes. As early as 1932, Foster1 in a classic paper recognized that the electric network is a special class of a more general class of oriented graphs and geometrical circuits. More rec... View full abstract»

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  • 22. A transformer-ratio-arm bridge for high-voltage capacitance measurements

    Publication Year: 1963, Page(s):606 - 611
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2882 KB)

    A high-voltage capacitance ratio bridge based on the current comparator principle is described. The inherent advantages of this bridge are high sensitivity and high accuracy without the necessity of a secondary balance. By suitable design the bridge is made direct reading in capacitance ratio and dissipation factor. It has a resolution of 1 ppm (part per million) and an accuracy of approximately 1... View full abstract»

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  • 23. Analysis of linear time-varying circuits by the Brillouin-Wentzel-Kramers method

    Publication Year: 1954, Page(s):93 - 96
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (842 KB)

    This paper presents a general mathematical technique for studying the response of linear time-varying circuits that contain parameters whose magnitudes vary in a periodic manner with the time. The method presented is based on the Brillouin-Wentzel-Kramers (BWK) procedure, which has been widely used in connection with problems of wave mechanics. This method gives approximate results with very littl... View full abstract»

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  • 24. Two-dimensional signal representation using prolate spheroidal functions

    Publication Year: 1963, Page(s):30 - 40
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3560 KB)

    Two similar 2-dimensional signal representations are defined for use in signal analysis problems. The proposed procedure divides the time-frequency plane into rectangles of arbitrary length and width and assigns a certain portion of the represented signal to each such rectangle. Representations are based upon time-limited and band-limited forms of the angular prolate spheroidal functions for conce... View full abstract»

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  • 25. On the equivalent circuits of linear amplifiers

    Publication Year: 1956, Page(s):691 - 694
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (634 KB)

    The usefulness of the equivalent circuits of linear amplifiers for the circuit designer may be enhanced if the reciprocal forward- and reverse-equivalent circuits are derived. Applications to the grounded cathode vacuum-tube amplifier and to the grounded emitter transistor amplifier are shown. View full abstract»

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  • 26. Computation of the impedances of nonuniform lines by a direct method

    Publication Year: 1956, Page(s):551 - 554
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (806 KB)

    The impedances of nonuniform or tapered lines are computed directly by solving a first-order nonlinear differential equation of the Riccati type. Special cases which include the uniform line, the exponential line, the Bessel line, and the Heaviside-Bessel line are discussed. A general reversion method for solving the nonlinear differential equation for the line impedance is discussed. View full abstract»

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  • 27. A modified limiting nonlinear theory of eddy-current phenomena in solid iron

    Publication Year: 1962, Page(s):48 - 55
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2524 KB)

    A modified limiting nonlinear representation of the magnetic characteristic of saturating ferromagnetic materials is employed in conjunction with the Maxwell field equations in the analysis of various types of problems that arise for time-varying magnetization processes of solid steel structures. The B-H relationship of the material is expressed by the broken-line representation: B = + Bk + ¿H, H... View full abstract»

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  • 28. A mathematical analysis of a series circuit containing a nonlinear capacitor

    Publication Year: 1953, Page(s):238 - 244
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6048 KB)

    This paper presents a mathematical analysis of a general series circuit composed of an inductance and a resistance in series with a nonlinear capacitor. The analysis is based on the assumption that the saturation curve of the dielectric material of the capacitor may be represented by a hyperbolic sine function. A 1-term approximation of the forced steady-state oscillation of the circuit produced b... View full abstract»

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  • 29. A single-transistor magnetic-coupled oscillator

    Publication Year: 1956, Page(s):396 - 400
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2563 KB)

    AN IMPORTANT oscillator circuit which converts d-c to a-c square waves having an output frequency proportional to the d-c input voltage was developed by Royer.1 The circuit, shown in Fig. 1, employs a magnetic core constructed of square hysteresis loop material and two junction transistors operated as controlled switches.2 As the circuit oscillates, the core flux swings repetitively between its po... View full abstract»

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  • 30. The voltage coefficients of precision capacitors

    Publication Year: 1963, Page(s):612 - 621
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3417 KB)

    A method is presented for the measurement of the variation of capacitance with voltage in gas-dielectric capacitors. It consists of applying to the capacitor a direct voltage and using a small alternating voltage to measure the capacitance variation. The direct voltage coefficient obtained in this manner differs from that obtained with alternating voltage, and this relationship is studied theoreti... View full abstract»

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  • 31. On the transmission of information by orthogonal time functions

    Publication Year: 1960, Page(s):248 - 255
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1029 KB)

    In a digital communication system each digit of a character may be represented by one function of an orthogonal set of functions. This function is multiplied by + 1 or ¿ 1 if binary digits are being used. All functions of the character are added and transmitted in parallel. This sum of functions is correlated in the receiver with each function of the orthogonal set and voltages of amplitude + 1 o... View full abstract»

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  • 32. A silicon-controlled rectifier inverter with improved commutation

    Publication Year: 1961, Page(s):531 - 542
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5766 KB)

    The announcement of the silicon controlled rectifier1,2 in December 1957 instituted a new era in the field of electric power conversion. Almost immediately, attention was focused on the application of this device in inversion equipment.3 At first, silicon-controlled rectifiers were substituted for thyratrons in existing circuits. However, such direct replacements failed to take full advantage of t... View full abstract»

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  • 33. Design of a high-power wide-band balun for the high-frequency region

    Publication Year: 1963, Page(s):363 - 367
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2641 KB)

    A balun is a device for matching an unbalanced line to a balanced load. Described here is a balun with a cw (continuous wave) rating, with matched load, of 67.5 kva (kilovolt-amperes) over the frequency range from 2 to 30 mc (megacycles). A transmission-line-type design along with a newly developed ferrite core material and special cooling techniques have been used to achieve this wide bandwidth a... View full abstract»

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  • 34. Eddy-current phenomena in ferromagnetic materials

    Publication Year: 1954, Page(s):226 - 235
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3471 KB)

    INTEREST in eddy currents in solid iron masses has kept pace with the development of electromagnetic devices generally.1 The first problems arose in the design of eddy-current brakes for flywheels. Then the use of iron wires for telephone lines and iron rails for the supply of power to a-c locomotives led to new problems. It was recognized that the saturation of the iron was an important factor, a... View full abstract»

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  • 35. Gas and moisture equilibriums in transformer oil

    Publication Year: 1955, Page(s):312 - 318
    Cited by:  Papers (16)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1773 KB)

    OIL IS the major electrical insulation component of large high-voltage transformers. It must withstand, free of corona, the severe short-time electrical stresses imposed during factory test or abnormal service conditions, as well as the less severe normal-service stresses of long duration. It follows that best insulation design demands precise knowledge not only of the stresses imposed on the oil ... View full abstract»

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  • 36. Analysis of a comb filter using synchronously commutated capacitors

    Publication Year: 1953, Page(s):63 - 68
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1367 KB)

    THE possibility of constructing a comb filter by commutating the input signal to a bank of capacitors through a series resistor has been suggested in the literature.1 A theoretical investigation of the properties of such a filter is given in the following analysis. View full abstract»

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  • 37. The misapplication of graph theory to electric networks

    Publication Year: 1962, Page(s):257 - 267
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3641 KB)

    Graph theory offers a false and misleading model for an electric network, a tearable orthogonal structure possessing branches only, and no nodes or planes. The unnecessary introduction of nodes and an avalanche of meaningless matrices is a smoke screen to hide the use of tensors, whose appearance is imperative and inescapable. During their analysis, graph theorists must always necessarily return b... View full abstract»

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  • 38. Analysis and synthesis with the ¿¿complete¿¿ equivalent circuit for the wide-band transformer

    Publication Year: 1962, Page(s):55 - 62
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2444 KB)

    THE WIDE-BAND transformer is usually represented in its high- and low-end frequency response ranges by two appropriate collections of lumped-parameter network elements. The aggregate of of these network elements then constitutes low-pass and high-pass filters, respectively, and these filters may be synthesized or analyzed by standard filter techniques. The low-pass filter presents the greatest pro... View full abstract»

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  • 39. High-efficiency push-pull magnetic amplifiers with transistors as switched rectifiers

    Publication Year: 1958, Page(s):327 - 331
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1152 KB)

    In many magnetic amplifiers, push-pull action is used to obtain outputs that depend in polarity (or phase) on the signal polarity (or phase).1,2,3 View full abstract»

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  • 40. 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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  • 41. The measurement of short-duration impulse voltages

    Publication Year: 1963, Page(s):621 - 630
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6117 KB)

    A description is given of a very-small-impulse voltage divider which is insulated by compressed gas. The divider was designed for the measurement of steep-front impulse waves, and its errors have been evaluated by the step-response method, using a pressurized sphere gap. It was then used for measuring the volt-time curve of a sphere gap, and the results have been compared with those obtained by ot... View full abstract»

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  • 42. Analog division circuit

    Publication Year: 1959, Page(s):606 - 612
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1439 KB)

    In the field of automatic control, there is a need for simple and reliable devices which perform the operations of analog multiplication and division. This paper describes a circuit containing only-magnetic cores and windings, which produces an alternating voltage output directly proportional to the quotient of two d-c input signals. The output is also directly proportional to the alternating volt... View full abstract»

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  • 43. Effect of electric discharges on the breakdown of solid insulation

    Publication Year: 1954, Page(s):155 - 162
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3208 KB)

    The effect of corona on the long-time dielectric strength of insulation is emphasized in this paper, and various factors influencing the breakdown of insulation with corona are discussed. Data on the corona threshold voltages on dielectric surfaces at electrode edges show that the threshold voltage varies for a wide variety of dielectrics only as the ratio of dielectric thickness to dielectric con... View full abstract»

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  • 44. The propasation mechanism of impulse creepage discharges over oil-immersed surfaces

    Publication Year: 1955, Page(s):218 - 226
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5339 KB)

    A fundamental study of the mechanism of propagation of impulse creepage streamers over an insulating surface is reported. The studies were made using high-speed cameras, still cameras, and special probes, to give a new picture of the creepage process. High-speed photographs show that impulse creepage in the nonuniform field is a stepped discharge process, remarkably similar to natural lightning ex... View full abstract»

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  • 45. High-efficiency push-pull magnetic amplifier and its use as a D-C shunt motor drive

    Publication Year: 1958, Page(s):545 - 550
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1190 KB)

    This paper describes a d-c push-pull magnetic amplifier which is used to drive a d-c shunt motor. A circuit called the high-efficiency push-pull magnetic amplifier circuit was used successfully to drive a 1/20-horsepower d-c shunt motor.1 View full abstract»

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  • 46. A generalized chemical processing model for the investigation of computer control

    Publication Year: 1960, Page(s):458 - 473
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1707 KB)

    At present there is no direct method of comparing the relative applicability of the many computer-control schemes which have recently been proposed for use by the chemical and petroleum processing industries. While many of the computer manufacturers involved have undertaken joint study programs with several of the chemical and petroleum companies, proprietary considerations have to date prevented ... View full abstract»

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  • 47. Progress in the evaluation of solid-core high-voltage bushings

    Publication Year: 1955, Page(s):387 - 394
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3194 KB)

    A HIGH-VOLTAGE bushing which successfully sustains repeated application of 60-cycle and impulse test voltages may not be adequate for prolonged operation at rated line-to-ground voltage. Methods to evaluate bushings at voltages slightly in excess of operating voltages have therefore been devised. The techniques developed have been used to evaluate the life characteristics of the solid compound cor... View full abstract»

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  • 48. A new magnetic-controlled rectifier power amplifier with a saturable reactor controlling on time

    Publication Year: 1961, Page(s):152 - 155
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1339 KB)

    There is an increasing demand for high-efficiency fast-responding high-gain compact economical power amplifiers. There is need to accomplish these demands by a single unit which can provide a higher degree of economy and compactness than has previously been achieved. The combination of switching, semiconductors and saturable magnetic devices provides a solution for many of these demands. The silic... View full abstract»

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  • 49. Magnetic frequency multipliers

    Publication Year: 1954, Page(s):448 - 452
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1242 KB)

    WITH the availability of high-quality magnetic core materials, it has become possible to develop very efficient magnetic frequency multipliers. The advance of the electronic arts in the development of computers and precise control systems has created the immediate need for frequency multipliers which can produce exact multiplication of frequencies in power levels ranging from milliwatts to one kil... View full abstract»

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  • 50. Telephone influence factor (TIF) and its measurement

    Publication Year: 1961, Page(s):659 - 664
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (965 KB)

    From the earliest days of telephony the evaluation of message circuit noise has been an important problem. Of particular interest has been the evaluation of noise originating from harmonic components present in power system voltages and currents. Magnetic fields set up by power currents, and electric fields set up by power voltages, tend to induce voltages in nearby telephone conductors. Even a sm... 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