Resonators for the microcomputer compensated crystal oscillator

The goal of the resonator development program discussed by the authors was to develop dual c-mode resonators which have: frequency vs. temperature (f vs. T) characteristics free of significant anomalies; the minimum possible f vs. T slopes for the temperature ranges of interest; high Q; and small hy...

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Bibliographic Details
Published inProceedings of the 43rd Annual Symposium on Frequency Control pp. 8 - 15
Main Authors Filler, R.L., Vig, J.R.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1989
Subjects
Consumer electronics
Electrical resistance measurement
Frequency measurement
Hysteresis
Laboratories
Microcomputers
Oscillators
Temperature distribution
Temperature sensors
Thermal stresses
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Summary:The goal of the resonator development program discussed by the authors was to develop dual c-mode resonators which have: frequency vs. temperature (f vs. T) characteristics free of significant anomalies; the minimum possible f vs. T slopes for the temperature ranges of interest; high Q; and small hysteresis. Well-behaved dual c-mode SC-cut resonator designs have been successfully developed. Plano-convex resonators of the proper contour are shown to be well-behaved on both the third overtone, at 10 MHz, and on the fundamental mode over at least a -55 degrees C to +85 degrees C temperature range. Such resonators are shown to be suitable for microcomputer compensated crystal oscillators with a stability of a few parts in 10/sup 8/.< >
DOI:10.1109/FREQ.1989.68852