Design of a Narrow-Band Voltage Controlled Oscillator for Phase-Locked Frequency Multiplier in Miniature Rubidium Atomic Clock

CHEN Tao1–3; SUN Bing-feng1; 2; YAN Shi-dong1; MEI Gang-hua1; ZHONG Da1*

doi:10.11938/cjmr20140413

2014 , Vol. 31 >Issue 4: 587 - 595

DOI: https://doi.org/10.11938/cjmr20140413

Design of a Narrow-Band Voltage Controlled Oscillator for Phase-Locked Frequency Multiplier in Miniature Rubidium Atomic Clock

CHEN Tao1–3 ,
SUN Bing-feng1 ,
2 ,
YAN Shi-dong1 ,
MEI Gang-hua1 ,
ZHONG Da1*

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1. CAS. Key laboratory of Atomic Frequency Standards (Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences), Wuhan 430071, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Basic Department, Wuhan Technology and Business University, Wuhan 430065, China

*Corresponding author：ZHONG Da, Tel: 027-87198726, E-mail: zhongda@wipm.ac.cn.

Received date: 2014-03-17

Revised date: 2014-10-29

Online published: 2014-12-05

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Abstract

A narrow-band voltage controlled oscillator (VCO) circuit for phase-locked frequency multiplier in rubidium atomic clock was designed. A clapp oscillation circuit scheme was used in the design. The design of the VCO was analyzed and optimized by simulation. A true VCO circuit was constructed and tested. The performance specifications of VCO were as following: frequency covering 440~470 MHz, tuning sensitivity 18 MHz/V and second harmonic suppression -15 dBc. The phase-locked frequency multiplication system was found to have a low phase noise meeting the requirement of the miniature rubidium atomic clocks.

Key words： rubidium atomic clocks; narrow band voltage controlled oscillator; phaselocked frequency multiplication; phase noise

Cite this article

CHEN Tao1–3 , SUN Bing-feng1 , 2 , YAN Shi-dong1 , MEI Gang-hua1 , ZHONG Da1* . Design of a Narrow-Band Voltage Controlled Oscillator for Phase-Locked Frequency Multiplier in Miniature Rubidium Atomic Clock[J]. Chinese Journal of Magnetic Resonance, 2014 , 31(4) : 587 -595 . DOI: 10.11938/cjmr20140413

References

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