Frequency stability of SAW oscillators at high temperatures

Author

Sinha, Bikash K. ; Groves, Joel L. ; Sudo, Yukio ; Sato, Shigeru

Author_Institution

Nippon Schlumberger KK, Kanagawa, Japan

fYear

1988

Firstpage

288

Lastpage

300

Abstract

A broad overview is given of various factors affecting the frequency stability of surface-acoustic-wave (SAW) resonators. The objective has been to unravel the causes of large frequency drifts observed in SAW resonators operating at temperatures of 135°C and beyond. Experimental data are presented on both the long-term and short-term frequency stabilities of SAW devices at 25°C and 175°C for moderate to high drive levels. The behavior of SAW devices with pure aluminum and copper-doped aluminum electrodes are compared. It is shown that the short-term frequency stability of SAW devices with copper-doped aluminum electrodes is a few parts in 10¹⁰ even at 175°C and for moderately large drive levels. Overall, the best short-term frequency stability is found to be for a gate time of 0.1 s

Keywords

frequency stability; oscillators; surface acoustic wave devices; 0.1 s; 135 degC; 175 degC; 25 degC; Al; Al:Cu; SAW oscillators; frequency drifts; long term frequency stability; short-term frequency stabilities; Aluminum; Chromium; Electrodes; Fingers; Frequency; Oscillators; Stability; Surface acoustic wave devices; Surface acoustic waves; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium, 1988., Proceedings of the 42nd Annual

Conference_Location

Baltimore, MD

Type

conf

DOI

10.1109/FREQ.1988.27617

Filename

27617