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Acceleration effects in crystal filters-a tutorial
1Piezo Technology Inc., Orlando, FL.
Summary
A new dynamic method analyzes vibration-induced modulation in crystal filters, accurately predicting amplitude and phase changes. This method improves understanding of filter performance under acceleration, crucial for frequency source stability.
Area of Science:
- Electrical Engineering
- Acoustics
- Signal Processing
Background:
- Vibration can modulate crystal filter signals.
- Existing quasi-static methods have limitations in analyzing these effects.
Purpose of the Study:
- Introduce and validate a dynamic method for analyzing vibration-induced modulation in crystal filters.
- Determine both amplitude and phase modulation caused by vibration.
Main Methods:
- Treating the crystal filter as a linear network with time-varying elements.
- Developing a dynamic analysis approach.
- Illustrating the method with practical examples.
Main Results:
- The dynamic method accurately determines amplitude and phase modulation.
- Successfully applied to a spectrum clean-up scenario involving a frequency source and output filter under identical acceleration.
Conclusions:
- The dynamic method offers a comprehensive approach to understanding vibration effects on crystal filters.
- Essential for designing stable frequency sources in vibratory environments.
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