Abstract
Crystal Oscillators are widely used in many systems; and phase noise is one of the most important specifications of crystal oscillators. It is well known that crystal oscillators are acceleration sensitive devices. Vibration will degrade the phase noise of crystal oscillators used in many applications such as aircrafts, vehicles, and missiles, etc. This paper analyses the design of a novel low phase noise Anti-Vibration OCXO with emphasis on the influence of vibration on the phase noise. The solutions are analyzed in detail. Furthermore a low phase noise 100MHz anti-vibration OCXO has been designed based on the passive vibration isolation system combined with paired crystals compensation. The OCXO's SSB phase noise achieves −152dBc/Hz at 1 kHz offset frequency under random vibration condition.
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