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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:||Click here to retrieve PDF version of paper (555KB)|