Volume 26 Issue 5 • May 1989

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Displaying Results 1 - 5 of 5
  • Probing Boeing's crossed connections (aircraft instrumentation)

    Publication Year: 1989, Page(s):30 - 35
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    The causes and consequences of the misconnected circuits and hoses found in the fire protection systems of 94 in-service Boeing aircraft are examined. The problems were discovered during the massive worldwide inspections of fire protection systems in Boeing aircraft following the crash in England of a British Midland Airways Boeing 737 en route to Belfast in January 1989. These problems, of which ... View full abstract»

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  • Resonant-mode power supplies: a primer

    Publication Year: 1989, Page(s):36 - 39
    Cited by:  Papers (3)  |  Patents (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    The operation of the resonant-mode power supply is explained. The focus of this article is the quasi-resonant supply, so named because a power switch turns it off at intervals, interrupting the resonant cycle. The supplies have only become commercially feasible in the last two years, in part because particular kinds of transformers, capacitors, and controllers have just become available. The topol... View full abstract»

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  • VHDL links design, test, and maintenance

    Publication Year: 1989, Page(s):40 - 44
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (685 KB)

    The authors discuss the very high-speed integrated circuit (VHSIC) hardware description language (VHDL), a universal HDL that is being adopted for design tools throughout the electronics industry in the wake of its December 1987 approval as IEEE Standard 1076-1987. The main purpose of VHDL is to allow designers to model, synthesize, and simulate components, chips, and systems from the most abstrac... View full abstract»

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  • The battle for the SX-70 [camera integrated circuitry]

    Publication Year: 1989, Page(s):45 - 49
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    The story of the struggle between Fairchild Instruments and Texas Instruments for the contract to supply the integrated circuitry for Polaroid's SX-70 camera, introduced in 1972, is related. Research and development work by both companies is described. The problems caused by Polaroid's secrecy regarding the overall camera design are highlighted.<<ETX>> View full abstract»

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  • BiCMOS circuitry: the best of both worlds

    Publication Year: 1989, Page(s):50 - 53
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    The growing use of BiCMOS circuits, which benefit from the combination of low CMOS power consumption and high bipolar speed, is examined. The tradeoffs that BiCMOS circuits entail and the drawbacks that have hindered their wide adoption, especially for digital applications, are discussed. The growing opportunity for BiCMOS, as CMOS ICs have become more complicated and the benefits of scaling them ... View full abstract»

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