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Radio and Electronic Engineer

Issue 4 • Date April 1973

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Displaying Results 1 - 9 of 9
  • A new deal for technicians

    Publication Year: 1973
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (142 KB)

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  • Theory of cylindrical antennas with lumped impedance loadings

    Publication Year: 1973, Page(s):243 - 248
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (684 KB)

    A method is presented for the analysis of a thin symmetrical cylindrical antenna with lumped impedance loadings along its length. The loadings can be resistive, inductive, capacitive, or mixed, and their physical size is assumed to be of the order of the antenna radius. The values of admittances of such structures obtained by the theory are in good agreement with available experimental results. View full abstract»

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  • The enhancement of spurious signals in non-linear frequency multipliers

    Publication Year: 1973, Page(s):249 - 252
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (795 KB)

    An inherent disadvantage of non-linear frequency multipliers when fed from a signal source containing spurious signals, is the enhancement of these signals the multiplier pass-band as a function of the degree of multiplication. An analysis showing the enhancement effect is given, and some experimental results are described. View full abstract»

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  • A method of measuring negative impedance

    Publication Year: 1973, Page(s):253 - 256
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (649 KB)

    A method of measuring the components of a negative impedance has been developed. The device considered possesses an S-type negative impedance as opposed to an N-type, the tunnel diode being an example of the latter. The method of measurement is illustrated by measurements taken on a negative impedance booster used for compensating the losses of a wire transmission line. The technique of measuremen... View full abstract»

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  • On the design of equal ripple delay filters with Chebyshev stopband attenuation

    Publication Year: 1973, Page(s):257 - 265
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (930 KB)

    This paper is concerned with the design of low-pass filters, without all-pass sections, approximating to a constant group-delay in an equal ripple manner which simultaneously exhibit a Chebyshev type of stopband attenuation. A special type of equal ripple delay approximation, referred to as the constrained Chebyshev approximation, is used to derive the polynomial of odd degree in the denominator o... View full abstract»

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  • An experimental adaptive echo canceller for long distance telephone circuits

    Publication Year: 1973, Page(s):267 - 278
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1491 KB)

    A new concept of eliminating spurious echoes in long distance telephone circuits by adaptive echo cancellation has been experimentally implemented. In this paper the principles underlying the experimental device and the techniques used in their implementation are presented. Experimental results obtained from measurements in the laboratory as well as in a practical telephone system environment are ... View full abstract»

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  • Correction: Designing asynchronous counters

    Publication Year: 1973
    IEEE is not the copyright holder of this material | PDF file iconPDF (131 KB)
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  • An investigation of integrated circuit destruction by noise pulses

    Publication Year: 1973, Page(s):279 - 287
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1243 KB)

    Conventional integrated circuits have a high failure rate when operated in an environment including electromechanical switching systems. This paper discusses the destruction modes for the circuits and the equivalent circuit for the noise generation system. Experimental results which support the concept of the equivalent circuit are discussed. Finally, the transient thermal characteristics of typic... View full abstract»

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  • Letters to the Editor: Education in semiconductor technology

    Publication Year: 1973
    IEEE is not the copyright holder of this material | PDF file iconPDF (174 KB)
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