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  • 1
    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
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    Paper (German National Licenses)
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  • 2
    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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  • 3
    Electronic Resource
    Electronic Resource
    Analysis of force-frequency effect of piezoelectric circular resonators strained by edge angular-sector stresses (1985)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 6 (1985), S. 574-584 
    Details
    ISSN: 0392-6737
    Keywords: Piezoelectric and electrostriction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si compie un'analisi teorica dell'effetto forza-frequenza su due pesi opposti distribuiti su una porzione angolare dell'orlo del cristallo nel caso di un risonatore o di un sensore piezoelettrico. Si determinano attriti al centro del cristallo e si calcola il conseguente slittamento di frequenza. Applicando i risultati ottenuti, la posizione e l'ampiezza angolare dei portatori sono determinate per un taglio AT.
    Abstract: Резюме Проводится теоретический анализ частотно-силового эффеекта для двух противоположных нагрузок, распределенных по утловому сектору края кристалла в случае пьезоэлектрического резонатора или датчика. Определяются напряжения в центре кристалла и расчитывается соответствующий сдвит частоты. С помощйю полученных результатов определяются расположение и угловая ширина держателей для AT-среза.
    Notes: Summary A theoretical analysis of force-frequency effect of two opposite loads distributed over an angular part of the crystal edge is performed in the case of a piezoelectric resonator or sensor. Stresses are determined at the centre of the crystal and the subsequent frequency shift is calculated. Applying the obtained results, the location and angular width of holders are determined for an AT-cut.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02450593
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  • 4
    Electronic Resource
    Electronic Resource
    Characteristics of heated sensors emitting by radiation only
    Amsterdam : Elsevier
    Sensors and Actuators A: Physical 40 (1994), S. 173-178 
    Details
    ISSN: 0924-4247
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0924-4247(94)87002-0
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  • 5
    Electronic Resource
    Electronic Resource
    Temperature-induced frequency shifts in quartz resonators (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 58 (1985), S. 1388-1396 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The thermal exchanges in a quartz crystal resonator are investigated. This leads to a temperature gradient distribution which is in the main plane of the crystal, and therefore does not exhibit any functional dependence (at least at the first order) along the plate thickness. Internal heat source due to the energy dissipation by the internal friction is considered. The corresponding in-plane thermal stresses are calculated in the isotropic approximation, and anisotropy is introduced by means of the stress-strain relations. Applying a perturbation method, the resulting frequency shifts are obtained for both static and dynamic thermal behaviors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.336112
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  • 6
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    Characteristics of heated sensors emitting by radiation only (1994)
    Elsevier
    Details
    Publication Date: 1994-03-01
    Print ISSN: 0924-4247
    Electronic ISSN: 1873-3069
    Topics: Electrical Engineering, Measurement and Control Technology
    Published by Elsevier
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  • 7
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    Temperature‐induced frequency shifts in quartz resonators (1985)
    American Institute of Physics
    Details
    Publication Date: 1985-08-01
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
    Published by American Institute of Physics
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