Phase-Lock Loops in Vibration Environments

A. Hati, C. W. Nelson, and D. A. Howe

Abstract:	A popular scheme for achieving low phase noise across a large range of offset frequencies is to employ an oscillator at an output frequency with low far-from-carrier noise that is phaselocked to a reference that has low close-to-carrier noise. We investigate the effects of vibration on phase-locked loop (PLL) when two oscillators with different vibration sensitivity are phaselocked. For experimental verification, a 2.5-GHz surface-transverse wave (STW) oscillator integrated with and phase-locked to a reference 10-MHz quartz-crystal oscillator is chosen.The vibration sensitivity of a STW oscillator used for the experiment is slightly lower than the vibration sensitivity of the 10-MHz reference. The PLL is optimized for at-rest operation and then evaluated in the presence of different levels of random vibration.
Published in:	Proceedings of the 41st Annual Precise Time and Time Interval Systems and Applications Meeting November 16 - 19, 2009 Hyatt Regency Tamaya Resort Santa Ana Pueblo, New Mexico
Pages:	303 - 312
Cite this article:	Hati, A., Nelson, C. W., Howe, D. A., "Phase-Lock Loops in Vibration Environments," Proceedings of the 41st Annual Precise Time and Time Interval Systems and Applications Meeting, Santa Ana Pueblo, New Mexico, November 2009, pp. 303-312.
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