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    Digital FM Discriminator System

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    Author
    Breikss, Ivars P.
    Affiliation
    Honeywell, Inc.
    Issue Date
    1970-10
    
    Metadata
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    Rights
    Copyright © International Foundation for Telemetering
    Collection Information
    Proceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection.
    Publisher
    International Foundation for Telemetering
    Journal
    International Telemetering Conference Proceedings
    Abstract
    The Digital FM Discriminator described in this paper is used to demodulate FM signals with a high percentage (±40%) deviations. When contrasted to the conventional constant pulse width or the phase locked loop discriminators, the digital system has advantages of improved linearity and distortion performance. Additionally, because of the digital nature of the circuit, it requires no adjustment during setup or manufacture. The digital discriminator can be operated at any center frequency within the range of the integrated circuits used, provided that the proper ratio of the FM carrier center frequency and the clock frequency of the discriminator is maintained. In other words, the center frequency of the discriminator can be altered by altering the clock frequency. The digital discriminator provides an analog output which is a step-by-step reconstruction of the original modulating signal. In addition a digital word for each cycle of the FM carrier is generated corresponding to the amplitude of the modulating signal at that instant. The digital output is available in parallel as well as serial format.
    Sponsors
    International Foundation for Telemetering
    ISSN
    0884-5123
    0074-9079
    Additional Links
    http://www.telemetry.org/
    Collections
    International Telemetering Conference Proceedings, Volume 06 (1970)

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