| 直接数字频率合成器中的相位噪声分析 |
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| 引用本文： | 张骏凌,张玉兴. 直接数字频率合成器中的相位噪声分析[J]. 电子科技大学学报(社会科学版), 1999, 0(1) |
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| 作者姓名： | 张骏凌 张玉兴 |
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| 作者单位： | 电子科技大学电子工程系 |
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| 基金项目： | 国家“九五”重点科研项目 |
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| 摘 要： | 相位噪声和杂散性能是制约直接数字频率合成器（ＤＤＳ）用于高稳定频率源的关键指标。文中给出了一种全新思维，定量分析了ＤＤＳ中由相位截断引起的杂散谱及由相位截断、ＲＯＭ存储器有限字长和ＤＡＣ性能对其相位噪声性能的影响。
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| 关 键 词： | 直接数字频率合成器；相位截断：杂散；相位噪声 |
Analysis of Phase Noise in DDS |
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| Zhang Junling,Zhang Yuxing. Analysis of Phase Noise in DDS[J]. Journal of University of Electronic Science and Technology of China(Social Sciences Edition), 1999, 0(1) |
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| Authors: | Zhang Junling Zhang Yuxing |
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| Abstract: | Phase noise and spurious spectrum are the key characters in direct digital synthesizers (DDS)applied in the high stable frequency source. Actually, the poor performance of spurious spectrum from DDS hasalways restrained its applications. This paper introduces a new way to analyze the spurious spectrum and phasenoise generated by the phase truncation. The locations and amplitudes of spurious spectrum are preciselydtermined. Phase noise generated by the size of ROM look-up table and the performance of DAC is alsoinvestigated. |
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| Keywords: | direct digital synthesizers phase truncation spurious spectrum phase noise |
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