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AN ANALYSIS TO IMPROVE STABILITY OF DRIVE-MODE OSCILLATIONS IN CAPACITIVE VIBRATORY MEMS GYROSCOPES
Date
2009-01-29
Author
Alper, S. E.
Sahin, K.
Akın, Tayfun
Metadata
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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This paper presents an analysis showing that it is possible to determine the factors that limit the stability of drive-mode oscillations of a vibratory MEMS gyroscope with precise modeling. Specifically, unwanted electrical resonance characteristics of the gyroscope drive-mode are analyzed together with analytical expressions, whereas the results of the theoretical analyses are verified both by simulations and measurements, which agree very well. It is demonstrated that the stability of the drive-mode oscillations significantly improves by using a compensation capacitor across resistive preamplifiers of drive-mode oscillator output when the oscillator is driven by square-wave input signal generated by conventional automatic gain control (AGC) loops. The model can be used to identify and eliminate other factors that limit the bias stability.
Subject Keywords
Engineering, Electrical & Electronic
,
Nanoscience & Nanotechnology
URI
https://hdl.handle.net/11511/39167
DOI
https://doi.org/10.1109/memsys.2009.4805508
Collections
Department of Electrical and Electronics Engineering, Conference / Seminar