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Radio and Electronic Engineer

Issue 5 • Date May 1970

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Displaying Results 1 - 8 of 8
  • Fitness for purpose

    Publication Year: 1970, Page(s):233 - 234
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (257 KB)

    First Page of the Article
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  • Electronic circuit analysis using transformation matrices in conjunction with the multi-node method

    Publication Year: 1970, Page(s):235 - 248
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1432 KB)

    The representation of a network by its indefinite admittance matrix and the subsequent reduction to a nodal matrix is easily achieved. Any set of linear equations can be reduced by matrix partitioning to a 2×2 matrix; however, it is important to realize that if the easy-to-set-up nodal matrix is reduced, the resultant two-port representation has a node common to the input and output ports. The re... View full abstract»

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  • The e.m.i. four-tube colour television camera

    Publication Year: 1970, Page(s):249 - 270
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (4500 KB)

    The first part of the paper describes the background to the decision taken on the number and type of pickup tubes used in the camera. The argument for the use of a separate luminance tube is presented together with an explanation of the delta-L system for providing accurate colorimetry in a four-tube camera. Part 2 covers the considerations leading to the particular optical and mechanical arrangem... View full abstract»

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  • Realization of a quadratic with a positive real zero

    Publication Year: 1970, Page(s):271 - 272
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (361 KB)

    The network described uses on operational amplifier and has very low sensitivity to variations in RC component values View full abstract»

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  • Sixth-order non-minimum-phase delay functions with adjustable magnitude

    Publication Year: 1970, Page(s):273 - 274
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (163 KB)

    Two sixth-order all-pole delay functions, the Bessel and a Chebyshev, are modified according to Budak's technique to acquire five right-half s-plane zeros. The magnitude of the resulting functions is then adjusted to have the same half-power frequency as the corresponding Pade delay function, and the three functions are compared to each other in terms of various quantities associated with their fr... View full abstract»

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  • Gallium arsenide-phosphide visible lamps and arrays

    Publication Year: 1970, Page(s):275 - 278
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (792 KB)

    This paper describes the fabrication and properties of forward biased GaAsP electroluminescent lamps and arrays. GaAsP, suitably doped with selenium, is grown as an epitaxial layer on GaAs substrates using the arsine-phosphine system. Planar techniques are then employed to fabricate the p¿n junction by the diffusion of zinc into the epitaxial layer through a silicon dioxide mask. When forward bia... View full abstract»

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  • Optical harmonic generation in liquid crystals

    Publication Year: 1970, Page(s):279 - 285
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1636 KB)

    The non-linear optical properties of several cholesteric and nematic liquid crystals are studied in laser experiments on generation of secondand third-harmonic radiation. No secondharmonic is observed in any of the liquid crystal mesomorphic phases, indicating that the local molecular ordering in these phases is centrosymmetric. The generality of this result to datediminishes the potential of liqu... View full abstract»

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  • Performance factor and power gain of linear active two-ports

    Publication Year: 1970, Page(s):286 - 288
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (268 KB)

    Resistively mismatched, reactively tuned active two-ports can be designed for a given performance factor, n, by the analytical solution of appropriate equations. A previous paper provided a computer solution in the form of graphs for the range 1 ¿ n ¿ 10 and a simple, closely accurate, analytical solution for n ¿ 10. The present paper extends the computer solution from n = 1 to the limit of sta... View full abstract»

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