Chinese Journal of Magnetic Resonance

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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.

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

CLC Number: