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Component Parts, IRE Transactions on

Issue 1 • Date Mar 1961

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  • A Distributed-Parameter Approach to the High-Frequency Network Representation of Wide-Band Transformers.

    Publication Year: 1961 , Page(s): 23 - 30
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    An approach to the high-frequency representation is developed from the point of view of distributed-parameter networks. This viewpoint may be directly employed to compute insertion or transmission functions. Alternatively, it provides a method for determining the element values for lumped-parameter equivalent circuits. This method is most easily applied to transformers having two winding layers with turns ratios which are either very nearly unity or which depart very greatly from unity, and the paper largely confines itself to these cases. Distributed-parameter insertion-voltage ratios for a number of common two-winding transformer connections are presented and compared with experimental results. View full abstract»

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  • The Long-Term Stability of Fixed Resistors

    Publication Year: 1961 , Page(s): 31 - 40
    Cited by:  Papers (1)
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    The causes of long-term failure under practical conditions of use or storage of different types of fixed resistors commonly used in electronic equipment have been investigated. Some reported life tests have proceeded without interruption for almost four years. Carbon-composition (grade 2) resistors under load fail by slow thermal degradation of the resistive material. Drift of value may also occur if unloaded resistors of this type are stored in a damp atmosphere. Vitreous-enamelled wire-wound resistors made with fine wire may fail during tropical exposure both unloaded and especially when lightly loaded with direct current. This is owing to electrochemical corrosion taking place at faults in the vitreous coating. High-stability cracked-carbon (grade 1) resistors may fail rapidly under light dc load by electrochemical action if moisture condensation occurs and the protective paint or varnish coating is inadequate. Tests for long-term resistor stability are critically discussed. View full abstract»

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  • Thermistors,Their Theory,Manufacture and Application

    Publication Year: 1961 , Page(s): 6 - 22
    Cited by:  Papers (4)
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    Thermistors are components of comparatively recent development, although the phenomenon of conduction in metallic salts was recorded by Faraday over a century ago. The paper, in a broad survey of the subject, describes the theory of their operation, explains why they, in common with other semiconductor devices, possess a negative temperature coefficient of resistance and develops the expressions which govern their parameters. Methods of manufacture of the various forms of thermistor are outlined in general terms, and numerous applications of the device are described and discussed. Guidance is given on the approach to circuit problems, and the possibilities of exploiting some of the device's interesting and unusual properties are indicated. The point is made that the thermistor can now be used in many fields as an adequate alternative to components of more specialized application. View full abstract»

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Aims & Scope

This Transaction ceased production in 1962. The current publication is titled IEEE Transactions on Components, Packaging, and Manufacturing Technology.

Full Aims & Scope