一种超小型抗振恒温晶振的研制
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摘要
晶体振荡器是振动敏感器件,通常在振动条件下晶振的相位噪声会恶化。该文分析了抗振恒温晶振(OCXO)的设计方法及影响因素,阐述了振动对晶振相位噪声的影响,并采用微型减振器及低加速度灵敏度晶体谐振器设计了100 MHz超小型抗振恒温晶振。该文研制的100 MHz超小型抗振恒温晶振体积仅为25.4 mm×25.4mm×15mm,振动条件下相噪指标最优达到-147dBc/Hz@1kHz,达到了预期的研制目标。
It is well known that the crystal oscillator is a vibration-sensitive device;the phase noise of it is usually degraded under the vibration conditions.The design method and influencing factors of the anti-vibration oven controlled crystal oscillator(OCXO)are analyzed,and the effect of vibration on the phase noise of OXCO is presented.A 100 MHz ultra-compact,anti-vibration OXCO is designed with the micro vibration damper and low g-sensitivity crystal resonator.The size of the developed OCXO is only 25.4 mm×25.4 mm×15 mm,the optimal phase noise is up to-147 dBc/Hz@1 kHz offset under the random vibration condition.The expected development goal is achieved.
It is well known that the crystal oscillator is a vibration-sensitive device;the phase noise of it is usually degraded under the vibration conditions.The design method and influencing factors of the anti-vibration oven controlled crystal oscillator(OCXO)are analyzed,and the effect of vibration on the phase noise of OXCO is presented.A 100 MHz ultra-compact,anti-vibration OXCO is designed with the micro vibration damper and low g-sensitivity crystal resonator.The size of the developed OCXO is only 25.4 mm×25.4 mm×15 mm,the optimal phase noise is up to-147 dBc/Hz@1 kHz offset under the random vibration condition.The expected development goal is achieved.
引文
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[2]FRYS J,BURNETT G A.Reducing the acceleration sensitivity of AT-strip quartz crystal oscillators[J].IEEE,2010:25-30.
[3]XU Shuyi,CHEN Zhongping.Development of an antivibration crystal oscillator for reducing vibration-induced phase noise[J].Symposium on Piezoelectricity,Acoustic Waves and Device Applications,2011:217-220.
[4]陈亚良,李东来,徐金荣.晶体振荡器隔振系统理论研究[J].电子机械工程,2005,21(5):26-29.
[5]CLAYTONL D,EERNISSE E P.Four-point SC-cut crystal unit design calculations for reduced acceleration sensitivity[J].IEEE International Frequency Control Symposium,1992:582-596.