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  • Electronic Resource  (2)
  • Mechanical properties of solids (related to microscopic structure)  (1)
  • Piezoelectricity and electrostriction  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Crystal resonator design for space applications (1992)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 14 (1992), S. 595-603 
    Details
    ISSN: 0392-6737
    Keywords: Piezoelectricity and electrostriction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary Crystal resonators may be used on various vehicles. They are submitted to accelerations, shocks, vibrations and to external pressure and temperature variations (acceleration variations may be some 10g, pressure variations may reach one atmosphere and temperature 100°C). The goal of this paper is to describe an attempt to reduce the various environmental effects especially by use of a mounting structure external to the resonator. Each effect needs a particular study. 1) Shocks and vibrations. A particular fixation structure has been designed. Resonators can support a shock equivalent to 1000g over 0.1 ms in any direction. Also the mounting structure resonant frequency can be rejected over 3000 Hz. 2)g sensitivity.g sensitivity has been reduced. Theoretical and experimental results are given. 3) External pressure and temperature variations. Crystal enclosure is submitted to variations of pressure and temperature which yield enclosure deformations. The study of the resonator dependence by respect to its enclosure has been performed. A quartz structure surrounding the vibrating crystal has been designed and specific enclosures have been tried thus yielding reduced mechanical strains due to external pressure and temperature variations. These structures are described and discussed. Based on the results of the previous study of a series of 10 sample resonators has been manufactured. The performances are presented and compared to results obtained with previous designs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02462346
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Frequency overshoot in quartz crystal oscillators during the warm-up time. Application to the BVA resonator (1983)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 2 (1983), S. 1163-1174 
    Details
    ISSN: 0392-6737
    Keywords: Mechanical properties of solids (related to microscopic structure)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Résumé Une analyse complète du phénomène de dépassement de fréquence présenté par les oscillateurs à quartz pendant leur période de démarrage est présentée. Une application particulière est faite pour les oscillateurs équipés de résonateurs à électrodes non adhérentes.
    Abstract: Riassunto Si propone un'analisi del fenomeno di overshoot che è prodotto da oscillatori del quarzo durante il tempo di riscaldamento. Si descrive una particolare applicazione ad oscillatori equipaggiati con risonatori «senza elettrodi».
    Notes: Summary An analysis of the overshoot phenomenon which is produced by quartz oscillators during the warm-up time is proposed. A particular application to oscillators equipped with «electrodeless» resonators is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02457151
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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