| 直接数字频率合成器(DDS)及其性能分析 |
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| 引用本文： | 高泽溪.直接数字频率合成器(DDS)及其性能分析[J].北京航空航天大学学报,1998,24(5):615-618. |
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| 作者姓名： | 高泽溪 |
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| 作者单位： | 北京航空航天大学 工程系统工程系 |
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| 摘 要： | 介绍了直接数字频率合成器DDS(Direct Digital Synthesizer)的组成、工作原理及性能;运用信号系统理论和方法详细分析了DDS的相位噪声、杂散噪声、数字化截断误差对输出波形的影响以及DAC非线性对频谱纯度的影响等;还给出了相应的分析计算公式和响应曲线;得出的结论对提高DDS输出信号的质量有一定意义.
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| 关 键 词： | 频率合成器 频谱 分辨率 相位噪声 |
| 收稿时间： | 1997-04-03 |
Direct Digital Synthesizer (DDS) and Performance Analysis |
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| Gao Zexi,Gao Cheng.Direct Digital Synthesizer (DDS) and Performance Analysis[J].Journal of Beijing University of Aeronautics and Astronautics,1998,24(5):615-618. |
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| Authors: | Gao Zexi Gao Cheng |
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| Institution: | Beijing University of Aeronautics and Astronautics,Dept. of System Engineering of Engineering Technology |
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| Abstract: | This paper introduces the composition, operational principle and performance of DDS, and uses signal theory and method to analyze the effect of phase noise, spurious noise and digital phase truncation error on output wave form and the effect of DAC non linearity on spectrum purity in detail. Analysis formula and correspondence curve in question are also provided. The conclusion is some instructive to increase the quality of DDS output signal. |
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| Keywords: | frequency synthesizers frequency spectrum resolving power phase noise |
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