Method of making radiation hardened quartz crystal oscillators

Details Method of making radiation hardened quartz crystal oscillators Method of making radiation hardened quartz crystal oscillators

1985-01-22

1995-06-27

Moskowitz, Nelson

Oscillators

Frequency stabilization

331162, G04C 300, H03B 504, H03B 532

Patent

active

054283159

ABSTRACT:
A method is provided of making radiation compensated quartz crystal oscillators. According to the method, at least two quartz crystal oscillators are first selected that have different responses to energetic radiation from gamma rays, neutrons, etc. Each oscillator is characterized individually as to its radiation sensitivity, the oscillators then exposed to the same radiation flux and the respective output frequency extracted from each oscillator. The frequency difference between the oscillators arising from the influence of the radiation flux is then derived. A correction signal is then derived from the frequency difference and the known radiation sensitivities. The correction signal is then applied to one of the oscillators to effect radiation compensation of its frequency.

REFERENCES:
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patent: 4344046 (1982-08-01), Zumsteg
patent: 4358839 (1982-11-01), Wittke
patent: 4570132 (1986-02-01), Driscoll
Pellegrini et al, "Steady-State and Transient Radiation . . . ", Dec. 1978, BR Trans. Nucl. Sci, vol. NS-25, #6 pp. 1267-1273, abst.
Gualtieri et al, "Sweeping and Irradiation . . . ", Jun. 1984, Proc. 38th Ann. Freq. Control Symp. pp. 42-49, abst.
Brunner, J., "Wide Range Temperature Compensation . . . ", Jul. 10, 1975, Elect. Lett., vol. 11, #14.
Ballato et al, "Ovenless Activity Dip Tester . . . ", 31st Ann. Freq. Cantr. Symp., Mar. 3, 1977, pp. 102-107, abst.

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