波谱学杂志

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小型化10 MHz 恒温晶体振荡器设计

孙兵锋1,2,阎世栋1,陈 涛1,2,侯林山1,钟 达1,梅刚华1*   

  1. 1. 中国科学院原子频标重点实验室(中国科学院 武汉物理与数学研究所),湖北 武汉 430071;
    2. 中国科学院大学,北京 100049
  • 收稿日期:2013-12-09 修回日期:2014-07-25 出版日期:2014-09-05 发布日期:2014-09-05
  • 作者简介:孙兵锋(1978-),男,湖南常德人,博士研究生,从事小型化铷原子频标研究. *通讯联系人:梅刚华,电话:027-87197190,E-mail:mei@wipm.ac.cn.

Design of A Miniature 10 MHz Oven Crystal Oscillator

SUN Bing-feng1,2,YAN Shi-dong1,CHEN Tao1,2,HOU Lin-shan1,ZHONG Da1,MEI Gang-hua1*   

  1. 1. Key laboratory of Atomic Frequency Standards of Chinese Academy of Sciences (Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences), Wuhan 430071, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2013-12-09 Revised:2014-07-25 Online:2014-09-05 Published:2014-09-05
  • About author:*Corresponding author:MEI Gang-hua, Tel: 027-87197190,E-mail: mei@wipm.ac.cn.

摘要:

设计了用于高精度铷原子频标的一种小型化恒温压控晶体振荡器.振荡电路采用了稳定性好的并联型皮尔斯电路方案,采用2 级π 型LC 级联滤波器抑制谐杂波,利用互补对称式金属-氧化物-半导体(CMOS)反相器实施隔离.振荡和放大电路选用了低噪声晶体管.晶体的温度控制在频率-温度曲线拐点处.实现了体积为4 mL 晶振样件.晶振的短期频率稳定度为1.8×10-12/s,相噪对铷频标频率稳定度的贡献仅为3.2×10-13τ -1/2

关键词: 晶体振荡器, 小型化, 相位噪声, 频率稳定度

Abstract:

A small-size oven temperature controlled crystal oscillator for rubidium atomic frequency standards was designed. In the design, a Pierce oscillator circuit, a two step π type LC filter and a Complementary-Symmetery Metal-Oxicle-Semiconcluctor(COMS) inversion isolator were used. Low thermal noise transistors were employed in the circuit. The temperature of the crystal oscillator was set at the turning point of the frequency-temperature curve. The crystal oscillator was of a volume of 4 mL with a short-term frequency stability of 1.8×10-12/s. The oscillator was of low phase noise, and its fractional frequency stability contribution to a rubidium atomic frequency standard was estimated to be in a level of 3.2×10-13τ -1/2.

Key words: crystal oscillator, miniaturization, phase noise, frequency stability

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