Phase-Lock Loops in Vibration Environments
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 2009
- Accession Number
- ADA518089
Entities
People
- A. Hati
- C. W. Nelson
- D. A. Howe
Organizations
- National Institute of Standards and Technology