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Radio and Electronic Engineer

Issue 2 • Date February 1963

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Displaying Results 1 - 12 of 12
  • New light on an old subject

    Publication Year: 1963, Page(s):97 - 98
    IEEE is not the copyright holder of this material | PDF file iconPDF (160 KB)
    Freely Available from IEEE
  • A computer fixed store using light pulses for read-out

    Publication Year: 1963
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (975 KB)

    The store has an access time of 20 ns and can be interrogated every 100 ns. Information is stored on a punched card, or photographic matrix, and interrogation is by means of light pulses transmitted along optical systems composed of bunches of fine transparent optical fibres. Calculations show that a particular case is capable of storing 108bits but practical considerations reduce this to 2.5 × 1... View full abstract»

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  • Matrix analysis applied to transistor amplifier design

    Publication Year: 1963, Page(s):107 - 112
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (498 KB)

    The amplifier is treated in terms of h-parameters and the generalized matrix combines passive input and output terminating networks. The exact input and output impedances, current, voltage and power gain are derived and can be applied to transistor amplifiers of any configuration and arbitrary complexity of terminating impedances. View full abstract»

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  • Multiplicative arrays in radio-astronomy and sonar systems

    Publication Year: 1963, Page(s):113 - 118
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (724 KB)

    The paper is concerned with gathering together, and extending, some ideas on multiplicative receiving arrays as applied to radio-astronomy and sonar. The main emphasis is on systems using coherent-tone signals an(j designed for direction-determination. It is shown that, using arrays in which the outputs from the two halves are multiplied together, the accuracy of determination of target bearing ma... View full abstract»

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  • Points from the discussion on "Multiplicative arrays in radio-astronomy and sonar systems"

    Publication Year: 1963
    IEEE is not the copyright holder of this material | PDF file iconPDF (153 KB)
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  • The detection of sonar echoes in reverberation and noise

    Publication Year: 1963, Page(s):119 - 123
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (489 KB)

    A method is presented for calculating the frequency spectrum of reverberation in a shipborne pulse sonar and hence its effect in masking an echo which exhibits doppler. Signal processing is considered, as affecting the masking due to reverberation and noise combined. This enables the relative merits of sonars, or of proposed modifications, to be assessed more realistically than by considering nois... View full abstract»

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  • An engineering approach to the design of transistor feedback amplifiers

    Publication Year: 1963, Page(s):127 - 144
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1889 KB)

    A technique is developed for the design of transistor feedback amplifiers, based on the use of impedance mismatches between stages. Expressions are derived for the transmittance of the four basic building blocks¿the series and shunt single stage feedback amplifiers and the current and voltage feedback pairs¿and methods of interconnection which achieve the mismatch are considered. The expressions... View full abstract»

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  • A new analysis of the transistor phase-shift oscillator

    Publication Year: 1963, Page(s):145 - 153
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (613 KB)

    The relationship between transistor parameters and circuit characteristics of an RC phase-shift oscillator is analysed by flow-graph and root-locus techniques. Exact formulae and approximations for the starting frequencies of three- and four-section RC phase-shift oscillators are derived. Prediction of the operating frequency for a given current gain is presented graphically and compared with expe... View full abstract»

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  • Spectral density distributions of signals for binary data transmission

    Publication Year: 1963, Page(s):155 - 165
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (808 KB)

    The analysis of spectral density distributions of transmissions is of particular interest in the assessment and comparison of high speed digital data transmission systems. Where information rates are of the order of magnitude of the bandwidth available, the particular waveforms used become significant with regard to the bandwidth utilization of the link. On the assumption that all messages are equ... View full abstract»

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  • Effects of manufacturing tolerances on a typical non-stabilized line deflection circuit

    Publication Year: 1963, Page(s):167 - 175
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (784 KB)

    A typical circuit in which correct amplitude and linearity is obtained with nominal components is considered. The conditions studied are those which will cause a reduction in deflection amplitude and/or cause a deterioration in linearity. The items considered effecting width and/or linearity are: line transformer, deflection coils, drive shaping network, h.t. feed choke, tuning capacitor, feedback... View full abstract»

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  • A twin-t amplifier with stable gain and variable selectivity

    Publication Year: 1963, Page(s):177 - 187
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (923 KB)

    The principles of operation of low-frequency ¿twin-T¿ selective amplifiers are discussed and information is given regarding the design of such amplifiers in order to obtain a stable and predictable performance. The paper opens with the analysis of a simple system and its shortcomings. The twin-T network and the operation of its associated amplifier are then considered in detail. The complete sys... View full abstract»

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  • Some experiments on reading aids for the blind

    Publication Year: 1963, Page(s):188 - 190
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (312 KB)

    Discrimination tests were carried out using scanning devices to produce aural and tactile outputs. The use of stereophonic techniques to display sounds from different parts of a character at corresponding points in the inter-aural space was investigated. A two-dimensional display is considered to be a worthwhile improvement. View full abstract»

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