高精度時計用水晶発振器の周波数温度特性, 熱的ヒステリシスとエージング特性

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This paper describes frequency temperature behavior, thermal hysteresis and aging characteristics of quartz crystal oscillators for high precision clock using NS-GT cut quartz crystal resonators which are called self-temperature compensated crystal oscillators (S-TCXO's). The object of this paper is to clarify the frequency temperature behavior, its hysteresis and aging characteristics of the S-TCXO's. It is shown that a S-TCXO is successfully obtained with frequency deviation of + 30〜 -150 ppb at best over a wide temperature range of -30 to + 85℃, the thermal hysteresis is less than 0.38 ppm in frequency deviation, and then aging quantity after the pre-aging for about two weeks is 0.33 ppm at the mean value for one year and two months.
社団法人日本時計学会の論文
1993-09-25