IEEE Spectrum

Volume 7 Issue 9 • Sept. 1970

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  • [Front cover]

    Publication Year: 1970, Page(s): c1
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  • [Advertisement]

    Publication Year: 1970, Page(s): nil1
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  • [Breaker page]

    Publication Year: 1970, Page(s): nil2
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  • [Advertisement]

    Publication Year: 1970, Page(s): 1
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  • Table of contents

    Publication Year: 1970, Page(s):2 - 3
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  • The Institute of Electrical and Electronics Engineers, Inc.

    Publication Year: 1970, Page(s): 4
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  • [Breaker page]

    Publication Year: 1970, Page(s): 4
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  • [Advertisement]

    Publication Year: 1970, Page(s): 5
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  • Forum

    Publication Year: 1970, Page(s):6 - 10
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  • [Advertisement]

    Publication Year: 1970, Page(s):7 - 9
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  • News from Washington

    Publication Year: 1970, Page(s):11 - 12
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  • [Advertisement]

    Publication Year: 1970, Page(s): 13
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  • Focal points

    Publication Year: 1970, Page(s):14 - 17
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  • Calendar

    Publication Year: 1970, Page(s):18 - 19
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  • [Advertisement]

    Publication Year: 1970, Page(s): 20
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  • Spectral lines

    Publication Year: 1970, Page(s): 21
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  • Color EVR

    Publication Year: 1970, Page(s):22 - 33
    Cited by:  Papers (2)  |  Patents (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (10635 KB)

    In electronic video recording (EVR),† the color television signals are recorded on a special 8.75-mm-wide, high-resolution photographic film, with two frames side by side. One frame contains luminance information; the other, coded chrominance information. Sound is recorded on two magnetic edge stripes. An 18-cm-diameter cartridge can play 25 minutes of color programming or twice that duration of b... View full abstract»

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  • Laid off!

    Publication Year: 1970, Page(s):34 - 36
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  • Optical transmission utilizing injection light sources

    Publication Year: 1970, Page(s):37 - 46
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (6936 KB)

    Although a large amount of work in optical transmission has been accomplished through the use of lasers, modern developments have enabled noncoherent light sources also to be used in this area with great success. In particular, injection light sources-in the form of the coherent injection laser and the noncoherent light-emitting diode (LED)-offer designers of optical transmission systems character... View full abstract»

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  • Applications of a dc constant-current source

    Publication Year: 1970, Page(s):47 - 58
    Cited by:  Papers (4)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (8157 KB)

    Measuring resistance, performing a coulometric titration, measuring semiconductor breakdown voltages, operating IMPATT diodes, testing electrolytic capacitors, measuring magnetic field intensity-these represent only a few of the applications of constant-current sources. Some of the features of constant-current supplies, as well as the requirements imposed on these sources and techniques for using ... View full abstract»

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  • [Advertisement]

    Publication Year: 1970, Page(s):59 - 62
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  • Inductorless filters: a survey II. Linear active and digital filters

    Publication Year: 1970, Page(s):63 - 75
    Cited by:  Papers (10)  |  Patents (4)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (5022 KB)

    In this two-part survey the author has attempted to review the main methods of inductorless filter design being pursued at the present time. These filters are of particular interest because they may provide the replacement for the LC filters that are being eliminated from electronic equipment as a result of the trend toward microminiaturization. This month's installment discusses inductorless filt... View full abstract»

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  • The early history of electronics VI. Discovery of the electron

    Publication Year: 1970, Page(s):76 - 79
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1624 KB)

    The preceding five articles in this series described how advances in electromagnetic theory, one of the two parent sciences of today's electronics technology, led to its first successes at the turn of the century: "wireless" communications. But radiotelegraphy may well have remained an expensive and uncertain medium, restricted to emergency use in situations in which costs did not matter, if disco... View full abstract»

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  • Circuit breakers Physical and engineering problems III - Arc-medium considerations

    Publication Year: 1970, Page(s):80 - 84
    Cited by:  Papers (4)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (4571 KB)

    The problems treated in last month's discussion are essentially independent of the type of breaker, although their relative importance may vary. More specialized problems connected with the conception of certain physical principles of current interruption-mainly the arc medium-are described in this final installment. View full abstract»

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  • New product applications

    Publication Year: 1970, Page(s):85 - 90
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