一种小型化铷原子钟锁相倍频窄带VCO设计  

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

作　　者：陈涛[1,2,3] 孙兵锋[1,2] 阎世栋[1] 梅刚华[1] 钟达[1] 

机构地区：[1]中国科学院武汉物理与数学研究所、中国科学院原子频标重点实验室,湖北武汉430071 [2]中国科学院大学,北京100049 [3]武汉工商学院公共基础部,湖北武汉430065

出　　处：《波谱学杂志》2014年第4期587-595,共9页Chinese Journal of Magnetic Resonance

摘　　要：设计了一款用于小型化铷原子钟锁相倍频器的窄带VCO(压控振荡器)电路.振荡电路采用了稳定性好的克拉泼电路方案.应用仿真软件对该电路进行仿真分析和优化设计.最终设计出的VCO电路主要性能指标为:输出频率范围为440 MHz^470 MHz,频率调谐灵敏度为18 MHz/V,二次谐波抑制度为-15 d Bc,由其构成的锁相倍频器实现了低相噪设计要求,使小型化铷原子钟具备了实现高的频率稳定度潜力.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.

关 键 词：铷原子钟 窄带VCO 锁相倍频 相位噪声 

分 类 号：O482.53[理学—固体物理]