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Long-term aging of oscillators.

R L Filler1, J R Vig

  • 1US Army Res. Lab., Fort Monmouth, NJ.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|January 1, 1993
PubMed
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This study presents aging data for over 40 crystal oscillators, including temperature-compensated (TCXO) and oven-controlled (OCXO) types, over 1-10 years. Ruggedized TCXOs show excellent aging performance (<2x10(-10)/d), while OCXOs achieve a few parts in 10(12)/d.

Area of Science:

  • Electrical Engineering
  • Materials Science
  • Physics

Background:

  • Crystal oscillators are critical frequency-determining components in electronic systems.
  • Long-term aging is a key parameter affecting oscillator performance and system reliability.
  • Understanding oscillator aging is crucial for applications requiring high frequency stability.

Purpose of the Study:

  • To report and analyze aging data for a diverse set of crystal oscillators.
  • To evaluate the aging performance of temperature-compensated crystal oscillators (TCXOs) and oven-controlled crystal oscillators (OCXOs).
  • To assess the impact of ruggedization on TCXO aging for demanding applications.

Main Methods:

  • Accumulation of aging data using an automated aging facility.

Related Experiment Videos

  • Testing of over 40 oscillators from various sources over periods of 1 to over 10 years.
  • Controlled temperature environment maintenance for TCXOs.

    • Main Results:

    • Aging data collected for TCXOs and OCXOs over extended periods.
    • Ruggedized TCXOs designed for high-shock environments demonstrated surprisingly good aging (<2x10(-10)/d).
    • Superior OCXO models exhibited long-term aging rates of a few parts in 10(12)/d.

    Conclusions:

    • Crystal oscillators, particularly OCXOs and specialized TCXOs, can achieve excellent long-term aging performance.
    • Ruggedized TCXOs are suitable for applications with extreme environmental demands without significant aging degradation.
    • The study provides valuable data for selecting and utilizing oscillators in high-stability and harsh-environment applications.