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Publication Citation: Phase-lock Loops in Vibration Environments

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Author(s): Archita Hati; Craig W. Nelson; David A. Howe;
Title: Phase-lock Loops in Vibration Environments
Published: November 16, 2009
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 phase-locked 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 phase locked. 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.
Proceedings: Proc. 2009 PTTI Mtg.
Pages: pp. 303 - 312
Location: Santa Ana Pueblo, NM
Dates: November 17-19, 2009
Keywords: oscillator,phase-locked loop,phase modulated noise,vibration sensitivity
Research Areas: Physics, Time and Frequency
PDF version: PDF Document Click here to retrieve PDF version of paper (555KB)