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Electronics Letters

Issue 4 • Date February 23 1968

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Displaying Results 1 - 13 of 13
  • Gunn effect with two samples in parallel

    Publication Year: 1968 , Page(s): 63 - 64
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (313 KB)  

    The current waveform of two long Gunn oscillators in parallel in a transmission line is described and is extended to include the effect of putting a resistor in series. View full abstract»

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  • Learning method for identification of process dynamics

    Publication Year: 1968 , Page(s): 64 - 66
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (353 KB)  

    The dynamic behaviour of some parts of a process can be relatively easily used as part of a process model (the initial process model). Small perturbations are applied to the process input, and the initial process model can be updated by a learning procedure to give an updated process model, which should accurately match the process. View full abstract»

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  • Hollow-cathode discharges in mercury at low pressures

    Publication Year: 1968 , Page(s): 66 - 67
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (252 KB)  

    Self-sustained discharges, similar in mechanism to hollow-cathode discharges, have been seen at mercury vapour pressures down to 1 mtorr if initial ionisation is produced from an auxiliary discharge. Measurements of microwave emission point to a beam-plasma interaction mechanism. View full abstract»

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  • Skin effect in microwave semiconductor diodes

    Publication Year: 1968 , Page(s): 67 - 68
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (282 KB)  

    It is commonly assumed that the skin effect is the cause of an increase in the series resistance of a semiconductor diode at microwave frequencies. This letter presents some simple theoretical calculations which show that the validity of such an assumption is highly doubtful. View full abstract»

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  • Mapping of electromagnetic fields by photochemical reaction

    Publication Year: 1968 , Page(s): 68 - 69
    Cited by:  Papers (3)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (507 KB)  

    A standard photographic film was proved to be applicable to a quick and easy direct mapping of an electromagnetic field. The method utilises selective development of the film in accordance with the thermo-image produced by the electromagnetic field. The method would be most useful for preparing microwave holograms. View full abstract»

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  • Optimisation of the cascade synthesis of distributed-RC networks

    Publication Year: 1968 , Page(s): 69 - 70
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (324 KB)  

    The practical applicability of the cascade synthesis of distributed-RC networks is limited by the ratio of maximum and minimum capacitance or resistance of individual cascade sections. A modification of this method, which minimises the mentioned ratio and is therefore more useful for practical design, is described here. View full abstract»

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  • Ray interpretation of modes in curved nonuniform waveguides

    Publication Year: 1968 , Page(s): 70 - 72
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (436 KB)  

    The letter extends an earlier contribution, showing that, in curved as in straight waveguides, the modes can be described meaningfully in ray-optical terms, and that characteristic caustic surfaces play a significant role in generating the modal-ray system. View full abstract»

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  • Semiconductor-diode v.h.f. and u.h.f. noise sources

    Publication Year: 1968 , Page(s): 72 - 73
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (324 KB)  

    The v.h.f. and u.h.f. noise properties of silicon and gallium-arsenide diodes are discussed. A formula for calculating the noise output is given. View full abstract»

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  • M.O.S. analogue memory element

    Publication Year: 1968 , Page(s): 73 - 74
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (280 KB)  

    A method is proposed which may permit extensive adaptive structures to be fabricated from large-scale integrated circuits. The method involves using the gate charge of an m.o.s.t. as an analogue memory element and changing its magnitude by ionisation. Some initial experimental results for a single device are quoted. View full abstract»

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  • Time-discrete networks

    Publication Year: 1968 , Page(s): 74 - 75
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (288 KB)  

    In this letter, the authors pose an interesting area of study which, it is felt, will lead to a clarification of the relationship between network theory and system theory. Specifically, it is proposed that a formal study be made of networks of RLC components characterised by difference relations rather than differential relations. The main contribution is a set of definitions which preserve stabil... View full abstract»

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  • Adjustment of the responses of reduced dynamical systems

    Publication Year: 1968 , Page(s): 75 - 76
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (279 KB)  

    The letter is concerned with methods for improving the responses of reduced-order dynamical systems. Particular emphasis is placed on the minimisation or elimination of steady-state errors. View full abstract»

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  • Operation modes in mutually synchronised system

    Publication Year: 1968 , Page(s): 76 - 77
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (265 KB)  

    Several operation modes may exist in a mutually synchronised system owing to the periodicity of the phase comparators employed. In order to avoid a situation like this, analyses of operation modes are given, assuming the sawtooth characteristics for the phase comparators. View full abstract»

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  • Erratum: Wave interaction with moving boundaries

    Publication Year: 1968
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (143 KB)  

    First Page of the Article
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Electronics Letters is internationally renowned for its rapid communication of new developments and emerging topics across the broad and interdisciplinary field of modern electronics and electrical engineering.

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Meet Our Editors

Editors-in-Chief

Professor Chris Toumazou
Director of the Biomedical Institute
Imperial College, London, UK

Professor Ian White
Head of Photonics Research
University of Cambridge, UK