| 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(自然科学版), 1999, 28(1): 24-27 |
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| 作者姓名： | 张骏凌 张玉兴 |
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| 作者单位： | 1.电子科技大学电子工程系 成都 610054 |
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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 |
| 收稿时间： | 1998-05-27 |
Analyses of Phase Noise in DDS |
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| Zhang Junling,Zhang Yuxing. Analyses of Phase Noise in DDS[J]. Journal of University of Electronic Science and Technology of China, 1999, 28(1): 24-27 |
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| Authors: | Zhang Junling Zhang Yuxing |
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| Affiliation: | 1.Dept. ofElect. Eng.,UEST of China Chengdu 610054 |
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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 has always restrained its applications. This paper introduces a new way to analyze the spurious spectrum and phase noise generated by the phase truncation. The locations and amplitudes of spurious spectrum are precisely dtermined. Phase noise generated by the size of ROM look-up table and the performance of DAC is also investigated. |
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