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IEE Review

Issue 4 • Date 20 April 1989

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Displaying Results 1 - 4 of 4
  • Power hybrids-developments in packaging technology

    Publication Year: 1989, Page(s):149 - 151
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (240 KB)

    A power hybrid is any circuit solution that dissipates more than 5 W/in/sup 2/ and incorporates more than one packaging technology. There are a number of developments now used in manufacturing power hybrids, and a key one is direct-bonded-copper isolation-substrate technology. The author describes this technique as well as heavy wire bonding and other techniques. The mixing of packaging technologi... View full abstract»

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  • GaAs on Si-the ultimate wafer?

    Publication Year: 1989, Page(s):136 - 137
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (310 KB)

    There are two basic reasons why growing GaAs on Si could be worthwhile. First, it could provide a low-cost, robust source of GaAs wafers. Growing single crystals of GaAs is relatively difficult, and GaAs wafers are generally smaller and more expensive than their silicon counterparts. They are also more fragile and prone to breakage. Secondly, it would allow high-speed digital Si, high-frequency an... View full abstract»

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  • The future of terrestrial broadcasting-the short-wave super transmitter

    Publication Year: 1989, Page(s):131 - 134
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (423 KB)

    The author discusses the development of single-sideband broadcasting and the short-wave super transmitter. The use of pulse duration modulation to reduce energy costs is discussed. Other energy saving methods such as dynamic amplitude modulation are also discussed. The author describes single-tube-equipped 500 kW transmitter technology.<> View full abstract»

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  • RDS-the way ahead for radio

    Publication Year: 1989, Page(s):127 - 129
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (284 KB)

    The author describes the background to RDS (radio data systems) which enable the listener to 'programme' a radio to hunt for news or travel information and eliminate the need for manual retuning. The author discusses static and dynamic RDS and the design of radios for the system.<> View full abstract»

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