Electronic system containing analog and digital circuits makes high-precision, four-wire measurements of resistance of each germanium resistance thermometer (GRT) in array of devices, using alternating current (ac) of 1 micro-A. At end measurement interval, contents of negative register subtracted from positive one, resulting in very-narrow-band synchronous demodulation of carrier wave and suppression of out-of-band noise. Microprocessor free to perform other duties after measurement complete. Useful in noisy terrestrial environments encountered in factories.


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    Title :

    Analog/Digital System for Germanium Thermometer


    Contributors:

    Published in:

    Publication date :

    1988-10-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English





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