Integrated quartz oscillator for aerospace applications
Abstract
A thermostated quartz oscillator was realized using a miniature resonator. Tests on the packaged device show stability over 10 sec of 2.1 times 10 to the minus 11th power; at startup temperature = 20 C, 10 to the minus 7th power in 30 sec, 10 to the minus 8th power in 1 min; for minus 30 C, 10 to the minus 7th power in 30 sec, 10 to the minus 8th power in 3 min. The relative frequency variation between minus 20 and plus 20 C is 2 times 10 to the minus 8th power; between minus 30 and plus 55 C it is 10 to the minus 7th power. Ion impurities in the quartz were characterized by relaxation in a high electric field in order to reduce oscillator sensitivity to radiation.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 April 1988
 Bibcode:
 1988STIN...8911125M
 Keywords:

 Airborne Equipment;
 Crystal Oscillators;
 Miniaturization;
 Quartz Crystals;
 Frequency Stability;
 Relaxation Oscillators;
 Resonators;
 Temperature Effects;
 Thermostats;
 Electronics and Electrical Engineering