High-Stability Temperature-Compensated Crystal Oscillator Study (HSTCXO).
Final rept. 1 Mar 71-15 Dec 72,
COLLINS RADIO CO CEDAR RAPIDS IOWA
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DE SEMICONDUCTORS, SCHEMATIC DIAGRAMSA high-stability temperature-compensated crystal oscillator HSTCXO has been developed for eventual use in advanced SSB communications equipment. Important features of the oscillator are small frequency variations with temperature plus or minus 5 pp 10 to the 8th power from -40 to 80 C, low power 150 mW, fast warmup 1 pp 10 to the 8th power in 1 minute, and insensitivity to load and voltage variations plus or minus 5 pp 10 to the 9th power. A principal objective of the study, in addition to achieving the desired performance levels, was to develop compensation procedures that are practical and economical for high-volume production. A well-delineated compensation method has been developed and tested in the course of fabricating 10 exploratory models. Compensation is achieved in two steps coarse, by established voltage divider techniques, and fine, by a new digital technique previously conceived at Collins Radio Company. Modified author abstract
- Electrical and Electronic Equipment
- Voice Communications