晶体振荡器输出的精密频率改正技术
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摘要
在数字化的背景下,借助于采样时钟和输入信号之间的时钟游标效应以及模数转换器的量化误差抑制技术,该文提出了一种先进的直接数字测量原理。以此原理设计了一款针对精密晶体振荡器的精密频率改正器,用于解决精密石英晶体振荡器老化和自身频率准确度的变化问题。相比传统的频率合成器宽范围频率调节,其不同之处在于采用非标准频率的晶体振荡器作为参考,通过频率改正功能实现标准的频率输出,其输出信号的频率范围明显要窄的多,同时可以实现秒级稳定度小于3×10~(-12),以及10~(-11)量级的微小频率改正。
This paper presents a new method which uses the clock cursor feature between the sample clock and input signal and ADC quantization error suppression techniques under the background of the digital. On this basis, a precision frequency adjustment for crystal oscillator is designed for improving the long-term aging and the change of the frequency accuracy of traditional precision quartz crystal oscillator. Compared with most of the traditional frequency synthesizers generating certain step frequency signal in a large range, the main difference is that the device takes the non-standard frequency signal of crystal oscillator as a reference to realize standard frequency signal output through frequency adjustment function. Meanwhile, the output signal is obviously narrower in range, but of higher precision, which can realize the second stability of less than 3×10~(-12) and a small frequency correction of 10~(-11) orders of magnitude.
This paper presents a new method which uses the clock cursor feature between the sample clock and input signal and ADC quantization error suppression techniques under the background of the digital. On this basis, a precision frequency adjustment for crystal oscillator is designed for improving the long-term aging and the change of the frequency accuracy of traditional precision quartz crystal oscillator. Compared with most of the traditional frequency synthesizers generating certain step frequency signal in a large range, the main difference is that the device takes the non-standard frequency signal of crystal oscillator as a reference to realize standard frequency signal output through frequency adjustment function. Meanwhile, the output signal is obviously narrower in range, but of higher precision, which can realize the second stability of less than 3×10~(-12) and a small frequency correction of 10~(-11) orders of magnitude.
引文
[1]周渭.时频测量的新技术-相位重合点检测技术[J].宇航计测技术,1993,3:61-68.ZHOU Wei.Time and frequency measurement technology-phase coincidence detection[J].Journal of Astronautic Metrology and Measurement,1993,3:61-68.
[2]周渭,偶晓娟,周晖,等.时频测控技术[M].西安:西安电子科技大学出版社,2006:138-143.ZHOU Wei,OU Xiao-juan,ZHOU Hui,et al.The time-frequency measurement and control technology[M].Xi’an:Xidian University Press,2006:138-143.
[3]王义遒.原子钟与相关物理学的研究[J].物理,2009,38(5):328-338WANG Yi-qiu.Research on atomic clocks and related physic[J].Physics,2009,38(5):328-338.
[4]白丽娜,周渭,都倩倩,等.一种新颖的铯原子钟频率信号处理的线路技术[J].西安电子科技大学学报,2015,42(2):97-102.BAI Li-na,ZHOU Wei,DU Qian-qian,et al.Novel cesium atomic clock frequency signal processing circuit technology[J].Journal of Xidian University,2015,42(2):97-102.
[5]BAI Li-na,SU Xin,ZHOU Wei,et al.On precise phase difference measurement approach using border stability of detection resolution[J].Review of Scientific Instruments,2015,86(1):015106.
[6]贯士俊.精密频率改正、相位微跃的实验[D].上海:中国科学院研究生院(上海天文台),2004.GUAN Shi-jun.Precision frequency correction,phase micro step experiment[D].Shanghai:Shanghai Astronomical Observatory,Chinese Academy of Sciences,2004.
[7]边玉敬,郑恒秋.精密频率改正器的研制[J].时间频率学报,1979,1:38-44.BIAN Yu-jing,ZHENG Heng-qiu.The development of the precision frequency corrector[J].Journal of Time and frequency,1979,1:38-44
[8]ZHOU Wei.The greatest common factor frequency and its application in the accurate measurement of periodic signals[C]//Proceedings of the IEEE International Frequency Control Symposium.[S.l.]:IEEE,1992:270-273.
[9]张雪萍,周渭,李智奇,等.周期性信号之间的相位量子特征及其应用[J].西安电子科技大学学报,2012,39(5):181-185.ZHANG Xue-ping,ZHOU Wei,LI Zhi-qi,et al.Phase quantum and its application between periodic signals[J].Journal of Xidian University,2012,39(5):181-185.
[10]ZHOU Hui,ZHOU Wei,XUAN Zong-qiang,et al.Ahigh-resolution frequency standard comparator based on a special phase comparison approach[C]//Proceedings of the2004 IEEE International Frequency Control Symposium.[S.l.]:IEEE,2004:689-692.
[11]李智奇,周渭,张雪萍,等.相位差群变化规律下相位噪声测量技术[J].西安电子科技大学学报,2013,40(4):114-118.LI Zhi-qi,ZHOU Wei,ZHANG Xue-ping,et al.Phase noise measurement based on the regularity change of phase difference group[J].Journal of Xidian University,2013,40(4):114-118.
[12]ZHOU Wei,LI Zhi-qi,BAI Li-na,et al.Verification and application of the border effect in precision measurement[J].Chinese Physics Letters,2014,31(10):100602.
[2]周渭,偶晓娟,周晖,等.时频测控技术[M].西安:西安电子科技大学出版社,2006:138-143.ZHOU Wei,OU Xiao-juan,ZHOU Hui,et al.The time-frequency measurement and control technology[M].Xi’an:Xidian University Press,2006:138-143.
[3]王义遒.原子钟与相关物理学的研究[J].物理,2009,38(5):328-338WANG Yi-qiu.Research on atomic clocks and related physic[J].Physics,2009,38(5):328-338.
[4]白丽娜,周渭,都倩倩,等.一种新颖的铯原子钟频率信号处理的线路技术[J].西安电子科技大学学报,2015,42(2):97-102.BAI Li-na,ZHOU Wei,DU Qian-qian,et al.Novel cesium atomic clock frequency signal processing circuit technology[J].Journal of Xidian University,2015,42(2):97-102.
[5]BAI Li-na,SU Xin,ZHOU Wei,et al.On precise phase difference measurement approach using border stability of detection resolution[J].Review of Scientific Instruments,2015,86(1):015106.
[6]贯士俊.精密频率改正、相位微跃的实验[D].上海:中国科学院研究生院(上海天文台),2004.GUAN Shi-jun.Precision frequency correction,phase micro step experiment[D].Shanghai:Shanghai Astronomical Observatory,Chinese Academy of Sciences,2004.
[7]边玉敬,郑恒秋.精密频率改正器的研制[J].时间频率学报,1979,1:38-44.BIAN Yu-jing,ZHENG Heng-qiu.The development of the precision frequency corrector[J].Journal of Time and frequency,1979,1:38-44
[8]ZHOU Wei.The greatest common factor frequency and its application in the accurate measurement of periodic signals[C]//Proceedings of the IEEE International Frequency Control Symposium.[S.l.]:IEEE,1992:270-273.
[9]张雪萍,周渭,李智奇,等.周期性信号之间的相位量子特征及其应用[J].西安电子科技大学学报,2012,39(5):181-185.ZHANG Xue-ping,ZHOU Wei,LI Zhi-qi,et al.Phase quantum and its application between periodic signals[J].Journal of Xidian University,2012,39(5):181-185.
[10]ZHOU Hui,ZHOU Wei,XUAN Zong-qiang,et al.Ahigh-resolution frequency standard comparator based on a special phase comparison approach[C]//Proceedings of the2004 IEEE International Frequency Control Symposium.[S.l.]:IEEE,2004:689-692.
[11]李智奇,周渭,张雪萍,等.相位差群变化规律下相位噪声测量技术[J].西安电子科技大学学报,2013,40(4):114-118.LI Zhi-qi,ZHOU Wei,ZHANG Xue-ping,et al.Phase noise measurement based on the regularity change of phase difference group[J].Journal of Xidian University,2013,40(4):114-118.
[12]ZHOU Wei,LI Zhi-qi,BAI Li-na,et al.Verification and application of the border effect in precision measurement[J].Chinese Physics Letters,2014,31(10):100602.