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Radio and Electronic Engineer

Issue 7 • Date July 1973

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Displaying Results 1 - 7 of 7
  • Journals under attack

    Publication Year: 1973
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (125 KB)

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  • A v.h.f. surveillance receiver adapted for the reception of suppressed-carrier double-sideband transmissions

    Publication Year: 1973, Page(s):407 - 417
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1213 KB)

    The paper describes the adaption of a v.h.f. surveillance receiver for reception of suppressed-carrier double-sideband signals by means of a synchronous demodulator of the 2F type employing a digital tracking filter. A theory of operation of the demodulator is developed and its performance under various conditions described. A discussion of the choice of automatic gain control is included. The per... View full abstract»

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  • A technique for gating short microwave pulses

    Publication Year: 1973, Page(s):418 - 420
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (410 KB)

    Short microwave pulses are generated by feeding c.w. microwave power into a closed, low loss resonant ring of waveguide so that the power circulates and builds up; this power may be released in the form of a short pulse of increased amplitude, by opening a gate controlled by p-i-n diode switch. An experimental system providing a 34 ns pulse with a 2-6 dB amplitude gain is described. View full abstract»

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  • Electrolytic capacitors: their fabrication and the interpretation of their operational behaviour

    Publication Year: 1973, Page(s):421 - 429
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1227 KB)

    The various stages in the production of an aluminium electrolytic capacitor are outlined and these are then related to the equivalent circuit so as to establish an understanding of the preparation parameters that affect the performance. Particular reference is made to studies undertaken on the effects of etching prior to anodization, the anodization itself, the electrolyte used and the mechanical ... View full abstract»

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  • Electron beam techniques for magnetic bubble device fabrication

    Publication Year: 1973, Page(s):430 - 434
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (825 KB)

    By using the electron beam machine to expose an electron sensitive resist and then by use of the 'float-off technique it is possible to produce the necessary permalloy overlay patterns for bubble devices with micron linewidths. Specification of the pattern is by computer program. At higher powers, the electron beam can also be used to damage the bubble material. This damage can be used to constrai... View full abstract»

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  • Circuit technology in a large computer system

    Publication Year: 1973, Page(s):435 - 441
    Cited by:  Papers (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1102 KB)

    In the design of a large high-speed computer, the size of the system leads to long cable delays for data transmitted between different parts of the machine. This problem and the interconnexion of a high-speed e.c.l. circuit family are discussed, and comment is made on future lines of development for technology in high-speed computers. Priority circuits in a large asynchronous system also present d... View full abstract»

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  • A direct conversion v.h.f. receiver

    Publication Year: 1973, Page(s):442 - 446
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (642 KB)

    A direct conversion radio receiver is described which is characterized by many fewer spurious responses than the conventional superheterodyne, and lends itself to integration in monolithic form. The major design problem derives from the need for an accurate two-phase tunable local oscillator. A circuit is described which uses a servo-controlled phase shifting network, and maintains the two outputs... View full abstract»

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