By Topic

Radio and Electronic Engineer

Issue 1 • Date July 1970

Filter Results

Displaying Results 1 - 8 of 8
  • A policy for planning research

    Publication Year: 1970
    Save to Project icon | PDF file iconPDF (121 KB)  
    Freely Available from IEEE
  • Solid-state television receivers¿a pattern of second generation design for monochrome and colour

    Publication Year: 1970
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (968 KB)  

    Semiconductor technology has now reached a point where high voltage transistors, integrated circuits and thyristors may be used with confidence in consumer equipment. In this paper solid-state monochrome and colour receivers are described that exploit the latest semiconductor devices to provide receivers of a high performance standard. For horizontal deflection, high-voltage transistors are used and regulation is obtained by the use of a thyristor employed as a phase-controlled rectifier in the power supply. Integrated circuits are extensively employed in both receivers, typical applications being for sound i.f. amplification, in the video signal processing sections and in the RGB matrixing and demodulator circuits of the colour receiver. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Colour centres in sodalites and their use in storage displays

    Publication Year: 1970 , Page(s): 17 - 25
    Cited by:  Papers (2)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1999 KB)  

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Digital carry applied to successive approximation digital voltmeters

    Publication Year: 1970 , Page(s): 27 - 32
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (690 KB)  

    Successive approximation encounters difficulties, when used in high resolution voltmeters, due to the settling time of the decision loop. Solutions so far have either slowed the reading rate, or have significantly increased complication and cost. Digital carry solves the problem both simply and inexpensively. It is applied to a voltmeter which, at 50 readings per second, has a scale length of 100,000. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The invention of frequency modulation in 1902

    Publication Year: 1970 , Page(s): 33 - 37
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (628 KB)  

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Synthesis using symmetric distributed RC-structures

    Publication Year: 1970 , Page(s): 38 - 44
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (692 KB)  

    This paper deals with the synthesis of transfer functions using symmetric structures, a symmetric structure being a three-terminal network composed of distributed and/or lumped RC elements, and having z11 = z22. Necessary and sufficient conditions are presented for the realization of a class of transfer functions by a three-terminal structure, which is a cascade of a number of networks of two types, one type being a ladder network whose different elements are cascades of symmetric structures, and the other type being a cascade of n symmetric structures. Realization procedures for this class of transfer functions are given. An extension is considered for the realization of a transfer function as a parallel interconnexion of such structures. Existing transfer function synthesis procedures using uniform lines are extended to include symmetric structures. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • New laser interferometry methods of measuring the velocity of high-speed model missiles

    Publication Year: 1970 , Page(s): 45 - 48
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1201 KB)  

    A modified Doppler technique is discussed, whereby a moving object is simultaneously illuminated by two intersecting laser beams which are coherent with one another. By comparing the different Doppler-shifted signals scattered, refracted, or diffracted from two overlapping light beams at the object, the velocity of high-speed missiles has been measured with good accuracy. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A commercial laser interferometer for length measurement by fringe counting

    Publication Year: 1970 , Page(s): 49 - 55
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1030 KB)  

    The advantages of length measurement by fringe counting are described. The instrument employs a stabilized frequency source which maintains the frequency to ± 1 part in 107, for a temperature range of at least 26 deg C. The error rate due to amplifier noise in the fringe circuits is negligible, and 20% drift can be tolerated. A measuring accuracy of 3 parts in 106 in average atmospheric conditions is achieved with an economical wavelength to inch and millimetre conversion method. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.