High Stability Temperature Compensated Crystal Oscillator Study.
Final rept. 28 Feb 75-29 Feb 76,
ROCKWELL INTERNATIONAL CEDAR RAPIDS IOWA COLLINS RADIO GROUP
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A miniature high-stability temperature-compensated crystal oscillator HSTCXO has been developed with new features for eventual use in SSB communications equipment. These new features are a wider temperature range for the same temperature stability or - 5 pp to 10 the 8th power from -46 to 85 C, single supply 10 or - 0.5 V, low power consumption less than 100 mW, a CMOS compatible output 10 V square wave and small size, 2.75 in X 1.5 in X 0.5 in 6.98 cm X 3.81 cm X 1.27 cm. Other important features of the HSTCXO are a 50-ohm output 0.125 V rms, insensitivity to load variations and voltage variations or - 5 pp 10 to the 9th power, and fast warmup 1 pp 10 to the 8th power of final frequency in 1 minute. The TCXO uses a conventional analog thermistor network of coarse compensation and a CMOS digital fine correction systems with a programmable memory for fine compensation. A computer data interpolation method is used to minimize the required number of data points for fine correction. Author
- Electrical and Electronic Equipment