By Topic

Radio and Electronic Engineer

Issue 3 • Date March 1980

Filter Results

Displaying Results 1 - 10 of 10
  • Two complementary publications

    Publication Year: 1980
    IEEE is not the copyright holder of this material | PDF file iconPDF (103 KB)
    Freely Available from IEEE
  • Letter to the Editor: The engineer-author

    Publication Year: 1980
    IEEE is not the copyright holder of this material | PDF file iconPDF (133 KB)
    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The philosophy of maintenance in an age of miniaturization

    Publication Year: 1980, Page(s):94 - 95
    IEEE is not the copyright holder of this material | PDF file iconPDF (317 KB)
    Freely Available from IEEE
  • Derivation of user communication requirements

    Publication Year: 1980
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (717 KB)

    Electronic communication needs of user organizations call for a `purpose orientated¿ examination if they are to be properly understood and solutions derived. Identification of the hardware and implementation are generally well covered in the literature and the paper therefore concentrates on obtaining a better understanding of an organization and its communication environment so that a fully effe... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Direct detection of a barker code carried on a p.s.k. signal

    Publication Year: 1980, Page(s):104 - 106
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (387 KB)

    The signal acquisition time at the input to a charge transfer device is often much shorter than the minimum dock period for useful operation of the device. A feasibility study has been carried out to use this property to down-convert and detect directly, in one operation, a signal pattern carried by phase-shift keying a signal whose frequency is much greater than the maximum clock frequency of the... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Frequency-independent analogue phase-shift network technique using field effect transistors

    Publication Year: 1980, Page(s):107 - 112
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (476 KB)

    A frequency-independent phase-shift network has been designed and constructed using field effect transistors as variable resistors. The operation of the system is shown to be similar to that of a phase lock loop with a self-generating v.c.o. Analysis of the system is given assuming linear operation. Phase difference outputs have been obtained in the frequency range 20¿80 kHz. The phase error intr... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Resonant modes in re-entrant cavities

    Publication Year: 1980, Page(s):113 - 116
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (401 KB)

    Experimentally-determined tuning characteristics are presented for a long cylindrical re-entrant cavity having dimensions similar to those used for Gunn oscillators and for studies on semiconductors. The results indicate the simultaneous existence of the dominant TEM and the fundamental TE modes of resonance. A perturbation technique is given for the identification of the modes. Theoretical calcul... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Effect of sharp-cut-off video-frequency filters on chrominance signal response in PAL colour television

    Publication Year: 1980, Page(s):117 - 121
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (639 KB)

    In television System I, the nominal bandwidth is 5.5 MHz but in most practical transmission systems the actual bandwidth is greater. There is a likelihood that video lowpass filters will be used in the future, for example in association with digital codecs, and it has been found that even when such filters have a passband of 5.5 MHz, critical signals such as colour bars and electronically generate... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The frequency shifting synthesizer

    Publication Year: 1980, Page(s):122 - 126
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (454 KB)

    An unusual class of digital frequency synthesizers is presented capable of very high frequency-resolution. Construction may be made very simple. In typical applications the complexity of the hardware may be reduced by up to 50% compared with earlier approaches. A standard circuit is defined which may be used in a variety of applications, several of which have been outlined as illustrations of the ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Transmission of speech by adaptive sampling

    Publication Year: 1980, Page(s):127 - 132
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (707 KB)

    This paper describes a technique for reconstructing a signal which has been sampled at a rate related to its short-term maximum frequency. The method described is based upon a theoretical simulation of active signal recovery filters containing periodically-operated switches. The cut-off frequency of such a filter is a function of the switching duty cycle. It is shown that the optimum filter is one... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.