Enhancement of Frequency Stability in Injection Locked Bulk Mode MEMS Oscillators

Madan Parajuli, Guillermo Sobreviela, Hemin Zhang, Ashwin A. Seshia

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations

Abstract

This paper reports experimental results demonstrating significant gains in frequency stability for bulk acoustic wave (BAW) silicon disk resonator oscillators due to the locking of degenerate modes. The results show that when two degenerate modes are locked, the minimum Allan deviation is improved by a factor of more than two times in comparison with the minimum Allan deviation for oscillators locked to the individual degenerate modes. A shortterm stability of 48.3 μHz (51 ppt @ 0.27 s integration time) is recorded for a MEMS oscillator with an output of 1 MHz which benchmarks favourably relative to the MEMS oscillator state-of-the-art and commercial crystal oscillators. The approach is applicable to the locking of oscillators based on degenerate modes generally and can be scaled to higher frequency axisymmetric resonators with the higher-order bulk modes also providing inherent immunity to shock and vibration.

Original languageEnglish
Title of host publication34th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages941-944
Number of pages4
ISBN (Electronic)9781665419123
DOIs
StatePublished - 25 Jan 2021
Externally publishedYes
Event34th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2021 - Virtual, Gainesville, United States
Duration: 25 Jan 202129 Jan 2021

Publication series

NameProceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
Volume2021-January
ISSN (Print)1084-6999

Conference

Conference34th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2021
Country/TerritoryUnited States
CityVirtual, Gainesville
Period25/01/2129/01/21

Keywords

  • MEMS oscillators
  • bulk mode resonators
  • degenerate modes
  • frequency stability

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