ACCELERATION SENSITIVITY COMPENSATION IN HIGH PERFORMANCE CRYSTAL OSCILLATORS

Donald A. Emmons

Abstract:	High stability crystal oscillators are an essential component in a wide variety of systems, from satellite based navigation and communications, to Doppler radar, time keeping and so on. In a hostile shock and vibration environment, the full potential of such systems is severely limited by the intrinsic acceleration sensitivity of the widely used resonator types. Thus, it becomes increasingly important to investigate the possibility of increased frequency stability under adverse conditions. Two approaches to achieving reduced sensitivity will be discussed. The first involves electronic compensation within the frequency control loop. The second utilizes two resonators of comparable acceleration sensitivity to compensate each other. Problems encountered in matching and tuning the resonators will be discussed, as well as orientation symmetry of the frequency deviation patterns. Results on frequency stability which reflect an improved static sensitivity of less than 5 x 10-11 per g are presented.
Published in:	Proceedings of the 10th Annual Precise Time and Time Interval Systems and Applications Meeting November 28 - 30, 1978 Goddard Space Flight Center Greenbelt, Maryland
Pages:	55 - 100
Cite this article:	Emmons, Donald A., "ACCELERATION SENSITIVITY COMPENSATION IN HIGH PERFORMANCE CRYSTAL OSCILLATORS," Proceedings of the 10th Annual Precise Time and Time Interval Systems and Applications Meeting, Greenbelt, Maryland, November 1978, pp. 55-100.
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