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Radio and Electronic Engineer

Issue 6 • Date June 1970

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Displaying Results 1 - 10 of 10
  • A government corporation for r & d?

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

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  • Digital control for primary radar systems

    Publication Year: 1970, Page(s):291 - 301
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2563 KB)

    An investigation into the use of digital logic techniques for simple pulsemodulated radar systems resulted in their application to provide the necessary controlling and timing waveforms for a display. The paper describes a conventional analogue display and its digital counterpart and compares both systems. Results for the performance of a logic system are given. View full abstract»

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  • Magneto-optic light modulators

    Publication Year: 1970, Page(s):302 - 304
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (548 KB)

    Magneto-optic modulators for near-infra-red radiation (wavelength 1.1 to 5.5 ¿m) are described. These modulators use the Faraday effect in single crystals of yttrium iron garnet. The modulators operate with low driving voltages and are well suited to transistor drive. The application of yttrium iron garnet as a laser Q-switch is also discussed. View full abstract»

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  • Institution dinner 1970

    Publication Year: 1970, Page(s):305 - 306
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (299 KB)

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  • A micrologic vector generator

    Publication Year: 1970, Page(s):307 - 315
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1183 KB)

    The specification, logical design and construction of a vector generator are described. The input data comprise two coordinate pairs giving the start and end points of the vector and a pair of single decimal digits which determine the gradient of the vector with respect to the two coordinate axes in the plane. The intermediate coordinate points are generated sequentially from the starting point of... View full abstract»

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  • An automatic equipment for recording the frequency variation of x-band oscillators with temperature over the range -40 to + 70°C with particular reference to gunn oscillators

    Publication Year: 1970, Page(s):316 - 320
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (994 KB)

    The Gunn oscillator under test is mounted inside an oven and has a thermocouple attached to it. The microwave output from it is fed, via a p-i-n diode leveller, into a microwave frequency discriminator with an almost linear range of 400 MHz. The outputs from the thermocouple and discriminator are fed to an X¿Y recorder. This equipment operates with very little attention and it is suitable for mak... View full abstract»

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  • Prediction of the stability of thin-film resistors

    Publication Year: 1970, Page(s):321 - 327
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (601 KB)

    A relationship is derived between the contribution of defects to the resistivity of a thin film and the non-linearity of its I¿V characteristic. The latter is characterized by the `third-harmonic index¿ (t.h.i.) of the film and it is shown that the initial value of t.h.i. is approximately linearly related to the change in resistivity over 1000 hours. It is concluded that the initial t.h.i. can b... View full abstract»

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  • Gunn-effect pulse and logic devices

    Publication Year: 1970, Page(s):329 - 339
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1281 KB)

    Further developments of high-frequency pulse and logic elements employing semiconductor bulk-effect devices are presented. Regeneration gain of high values has been achieved. The effects of circuit and device parameters have been investigated. Experimental and theoretical results are presented on a wide range of logic gates `Exclusive OR¿, `Inclusive OR¿, `AND¿ and `Inhibitor¿. Designs for thr... View full abstract»

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  • Stabilization of n-p-n Transistors

    Publication Year: 1970, Page(s):341 - 344
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (419 KB)

    A process for transistor manufacture is described which produces stable leakage currents when junctions are reverse-biased at elevated temperatures. The transistors also have a good gain relationship between 10 mA and 1 ¿A and this relationship is not seriously degraded during ageing. The process produces a low noise figure in the 1/f region which, it is believed, is related ot reliability. View full abstract»

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  • Some cellular logic arrays for non-restoring binary division

    Publication Year: 1970, Page(s):345 - 348
    Cited by:  Papers (13)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (454 KB)

    An array containing controlled adder-subtractor cells is described. An alternative array is presented which uses 2's complement arithmetic to perform subtractions. The operating speeds of the arrays are considered in connection with the logical design of the cells. An application of cellular arrays in generating the Napierian logarithm of a binary number is outlined. View full abstract»

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