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Proceedings of the IRE

Issue 4 • Date April 1951

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Displaying Results 1 - 25 of 30
  • [Front cover]

    Publication Year: 1951 , Page(s): c1 - c2
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  • News - New products

    Publication Year: 1951 , Page(s): 6a - 93a
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  • Table of contents

    Publication Year: 1951 , Page(s): 337
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  • Harry F. Dart, Regional Director, 1951-1952

    Publication Year: 1951 , Page(s): 338
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  • National Bureau of Standards Fiftieth Anniversary

    Publication Year: 1951 , Page(s): 339
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  • What's behind IRE?

    Publication Year: 1951 , Page(s): 340 - 341
    Cited by:  Papers (1)
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  • The Characteristics and Some Applications of Varistors

    Publication Year: 1951 , Page(s): 342 - 358
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    Varistors, circuit elements whose resistance is a function of the voltage applied, represent one important commercial application of semiconductors. They may be divided into two classifications: nonsymmetrical and symmetrical varistors. The first classification includes both metallic rectifiers such as copper oxide, selenium, and copper sulfide, and point contact rectifiers such as silicon and germanium. The only commercial varistor of the symmetrical class is the silicon carbide varistor, although a symmetrical characteristic may be obtained by connecting two nonsymmetrical varistors in parallel with proper polarity. Each varistor has its volt-ampere characteristic and at each point on this characteristic two different values of resistance may be defined, namely the dc resistance, defined as the ratio of voltage to current, and the dynamic or ac resistance, defined as the ratio of dE to dI. The former is important in problems dealing with steady-state dc or large-signal applications, while the latter is important when dealing with small applied signals. Because of the state of the art, varistors as manufactured commercially are less uniform than many other circuit elements and required uniformity is often obtained by special selection. Economical use of these elements therefore requires the circuit engineer to recognize clearly which of the several properties are important in his application and to specify special selection for only those properties and to the extent necessary for his application. View full abstract»

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  • Radio Progress during 1950

    Publication Year: 1951 , Page(s): 359 - 396
    Cited by:  Papers (2)
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  • Standards on Abbreviations of Radio-Electronic Terms, 1951

    Publication Year: 1951 , Page(s): 397 - 400
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  • Magnetic Delay-Line Storage

    Publication Year: 1951 , Page(s): 401 - 407
    Cited by:  Papers (5)
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    Recent developments established that binary information could be stored and read out in a magnetic medium statically by electrical pulses only. A number of these magnetic cores are connected together to form a static magnetic delay line in which a series of binary digits can be stored and read out. The operation of this form of delay line is briefly described and carefully analyzed. The optimum operating conditions are derived. The effect of eddy current loss and leakage inductance is considered. The criteria of stability of the system are discussed. View full abstract»

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  • A Receiver for Measuring Angle-of-Arrival in a Complex Wave

    Publication Year: 1951 , Page(s): 407 - 411
    Cited by:  Papers (2)
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    Since November, 1945, the Electrical Engineering Research Laboratory of the University of Texas has been engaged in making propagation measurements of 3.2-cm waves. Results of some of these tests have been published, but a description of the equipment used has not been generally available. This paper describes the latest arrangement of the phase-difference receivers, modifications of which were used in the tests previously described. This receiver provides data for separating two waves received simultaneously by means of signal-strength and phase-difference data received at three points. It is possible to measure phase difference between two 3.2-cm signals to an accuracy of 5° over a signal-strength range of 70 db and a signal-strength ratio between channels as high as 20 db. Absolute signal strength is measured to within 1 db, while relative signal strength is measured to 0.5 db. View full abstract»

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  • The Effect of the Lorentz Polarization Term on the Vertical Incidence Absorption in a Deviating Ionosphere Layer

    Publication Year: 1951 , Page(s): 412 - 419
    Cited by:  Papers (1)
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    The effect of the Lorentz polarization term on the vertical incidence absorption of a radio wave in a deviating ionospheric layer is determined. This result is obtained by using a double parabola approximation to the Chapman distribution of electron density as a function of height, and a single parabola approximation to the height distribution of the product of electron density times the collisional frequency. A constant times the logarithm of the reflection coefficient divided by the product of the scale height times the collisional frequency at the level of maximum ionization is obtained as a function of the ratio of the wave frequency to the vertical incidence critical frequency. This is compared with a similar result for the Sellmeyer theory of dispersion as given by Hacke. The results for a type of "nondeviating region" absorption are compared for both theories. The expression for the apparent height of reflection using the Lorentz theory is derived and compared with that obtained by Hacke for the Sellmeyer theory. These latter results are given for use in the experimental determination of the scale height in the layer. The determination of the value of the collisional frequency at the level of maximum ionization is discussed for both theories. View full abstract»

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  • High-Voltage Stabilization by Means of the Corona Discharge between Coaxial Cylinders

    Publication Year: 1951 , Page(s): 419 - 424
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    The corona discharge between coaxial cylinders affords a practical means for stabilizing high voltages in a manner analogous to the stabilization of low voltages by the familiar glow-tube regulator. The corona regulator is particularly suitable for stabilizing voltages above several hundred volts at currents below one milliampere. It is accordingly well adapted for controlling the beam-focusing and accelerating potentials of cathode-ray beam devices such as oscilloscope, iconoscope, and kinescope tubes, of electron diffraction cameras, and for stabilizing Geiger tube voltage sources. Some of the theoretical aspects of the corona-discharge region as related to voltage stabilization are reviewed. Circuit design relationships are considered in detail and are developed to an extent sufficient for adapting particular corona regulator tube characteristics to specific performance requirements. Examples of constructional features and performance characteristics of typical high-voltage regulating tubes are presented. View full abstract»

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  • Correlation Functions and Spectra of Phase- and Delay-Modulated Signals

    Publication Year: 1951 , Page(s): 425 - 428
    Cited by:  Papers (3)
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    A delay-modulated signal may be regarded as the response of a delay modulator to the carrier of the signal. By using this point of view a general expression for the correlation function of a delay-modulated signal is obtained. This expression is given in an operational form in which the operand is the correlation function of the carrier, and the operator is the correlation function of the delay modulator. The general result is applied to the determination of the correlation function of a delay-modulated signal having a periodic carrier, and, more particularly, to the determination of the correlation function of a phase-modulated signal. View full abstract»

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  • The Synthesis of RC Networks to Have Prescribed Transfer Functions

    Publication Year: 1951 , Page(s): 428 - 432
    Cited by:  Papers (4)
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    A synthesis procedure is described as an alternative to, and more general than, that due to Guillemin. The resulting network is in the form of a lattice and is capable of providing any arbitrary transfer function which is physically realizable by an RC network. Design work is simple and straightforward, and a numerical example is included. View full abstract»

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  • Maximum Output from a Resistance-Coupled Triode Voltage Amplifier

    Publication Year: 1951 , Page(s): 433 - 434
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    The optimum load resistance with respect to output voltage and the maximum voltage swing obtainable are investigated for a resistance-coupled triode voltage amplifier. View full abstract»

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  • Corrections and Additions

    Publication Year: 1951 , Page(s): 434 - 435
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  • Discussion on "A Source of Error in Radio Phase Measuring Systems" (R. Bateman, E. F. Florman, and A. Tait)

    Publication Year: 1951 , Page(s): 436 - 438
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  • Contributors to Proceedings of the I.R.E.

    Publication Year: 1951 , Page(s): 438 - 439
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  • Correspondence

    Publication Year: 1951 , Page(s): 439
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  • Institute news and radio notes

    Publication Year: 1951 , Page(s): 440 - 447
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  • Books

    Publication Year: 1951 , Page(s): 448 - 450
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  • Abstracts and references

    Publication Year: 1951 , Page(s): 451 - 464
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  • Section meetings

    Publication Year: 1951 , Page(s): 36a - 40a
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  • Student Branch Meetings

    Publication Year: 1951 , Page(s): 42a - 46a
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Aims & Scope

This Periodical ceased production in 1962. The current retitled publication is Proceedings of the IEEE.

Full Aims & Scope