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Radio and Electronic Engineer

Issue 5 • Date May 1982

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Displaying Results 1 - 8 of 8
  • Swapping students

    Publication Year: 1982, Page(s):199 - 203
    IEEE is not the copyright holder of this material | PDF file iconPDF (476 KB)
    Freely Available from IEEE
  • Electronics in forensic science

    Publication Year: 1982, Page(s):205 - 210
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2363 KB)

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  • The helium speech effect and electronic techniques for enhancing intelligibility in a helium-oxygen environment

    Publication Year: 1982, Page(s):211 - 223
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1903 KB)

    This paper considers the nature of the speech mechanism, and the effects on the speech spectrum of a high pressure helium-air environment. A comparison is made between the characteristics of speech distortions in a helium-air mixture and certain well-known characteristics of speech in normal air which give rise to similar effects. The criteria for good intelligibility are related to the performanc... View full abstract»

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  • Optimizing gate interconnections in four-phase dynamic logic m.o.s. l.s.i. technology

    Publication Year: 1982, Page(s):224 - 226
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (455 KB)

    Dynamic logic circuit technology has been used widely to implement large-scale integrated (l.s.i.) circuits using metal-oxide-silicon field effect transistors (m.o.s.f.e.t). One of the factors which determines the overall dimensions of a custom-designed random logic l.s.i. circuit is the number of interconnection tracks as they occupy a large part of the chip between functional modules. This paper... View full abstract»

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  • Thick-film materials for hybrids

    Publication Year: 1982, Page(s):227 - 234
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2302 KB)

    This paper briefly describes four areas of work involved in trying to establish the reliability and limitations of thickfilm materials. One of the most widely used resistor systems, Du Pont 1400, has been extensively examined and long-life stability predictions are made. The possibility of replacing gold conductors with lower cost silver alloys depends critically upon controlling or eliminating si... View full abstract»

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  • Voice encryption in multichannel paths

    Publication Year: 1982, Page(s):235 - 238
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (430 KB)

    A proposal is presented for a system for the encryption of the signal resulting from the time division multiplexing of N channels carrying digital voice signals. The channel synchronization principle is such that no extra sync-signal is transmitted but synchronization is extracted from the information signal. Furthermore, it provides a first echelon encryption of the signal because there is a cont... View full abstract»

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  • Drifting buoy observations using satellite telemetry

    Publication Year: 1982, Page(s):239 - 245
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (812 KB)

    Polar orbiting satellites, equipped with random access data collection and position fixing systems, have made practicable long-term remote oceanographic and meteorological observations by means of instrumented drifting buoys fitted with u.h.f. telemetry transmitters. The paper discusses the performance of nine buoys, deployed by the Institute of Oceanographic Sciences as part of the FGGE Southern ... View full abstract»

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  • The potential application of analogue matched and adaptive filters in spread-spectrum communications

    Publication Year: 1982, Page(s):246 - 258
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2697 KB)

    Spread-spectrum communication techniques use a common wideband channel to obtain subscriber accessing in secure, jam resistant links. Phase shift keying (p.s.k.) and frequency hopping (f.h.) under the control of a pseudo-noise (p.n.) code are favoured signal waveforms. The paper reviews the performance of surface acoustic wave and charge-coupled device fixed coded and electronically programmable a... View full abstract»

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