| 非理想DDS输出信号分析及滤波处理 |
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| 引用本文： | 陈跃,田书林,刘科.非理想DDS输出信号分析及滤波处理[J].电子质量,2008(9). |
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| 作者姓名： | 陈跃 田书林 刘科 |
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| 作者单位： | 电子科技大学自动化学院,四川成都,610054 |
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| 摘 要： | 直接数字频率合成(DDS)技术广泛应用于可变时钟发生电路中,文中介绍了直接数字频率合成(DDS)技术的基本原理和非理想情况下DDS输出频谱结构,然后分析了工程实际中杂散对时钟信号的影响,最后解释了以滤波器和锁相环(PLL)改善输出时钟信号质量的原理,并给出了实验结果。
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| 关 键 词： | 直接数字频率合成(DDS) 锁相环(PLL) 杂散 频谱 滤波器 |
The Signal Analysis of Nonideal DDS and its Filter |
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| Chen Yue,Tian Shu-lin,Liu Ke.The Signal Analysis of Nonideal DDS and its Filter[J].Electronics Quality,2008(9). |
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| Authors: | Chen Yue Tian Shu-lin Liu Ke |
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| Abstract: | DDS (diredt digital synthesis)is a new kind of frequency synthesizing technology that is widely applied in variable clock circuit..This paper presents the fundamental theory of DDS and the spectrum of the Nonideal DDS output signal firstly;then analyses the spurious signal and its effects on clock signal;finally explains the principle of improving the quality of clock signal using filter and PLL,and gives the result of experimentation. |
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| Keywords: | direct digital synthesis(DDS) Phase Locked Loop(PLL) Spurious Signal Spectrum filter |
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