| DDS信号发生器中椭圆低通滤波器的设计 |
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| 引用本文： | 彭辉生,陈永泰.DDS信号发生器中椭圆低通滤波器的设计[J].电子质量,2007(5):4-5. |
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| 作者姓名： | 彭辉生 陈永泰 |
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| 作者单位： | 武汉理工大学信息工程学院,武汉,430070 |
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| 摘 要： | 本文基于DDS技术的基本原理,对DDS信号发生器中所用的低通滤波器进行了设计.采用了截止特性陡峭的7阶椭圆函数低通滤波器,该滤波器的3 d B截止频率为120MHz,在145MHz处的衰减为60dB,且通带内纹波小于0.2dB.通过Multisim2001仿真研究表明:其幅频特性好,具有快速的衰减性.
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| 关 键 词： | 低通滤波器 EDA仿真 |
| 文章编号： | 1003-0107（2007）05-0004-02 |
Design of Low-pass Elliptic Filter in Signal Source Based on DDS |
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| Peng Hui-sheng,Chen Yong-tai.Design of Low-pass Elliptic Filter in Signal Source Based on DDS[J].Electronics Quality,2007(5):4-5. |
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| Authors: | Peng Hui-sheng Chen Yong-tai |
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| Institution: | School of Information Engineering, University of Technology, Wuhan 430070, China |
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| Abstract: | This article has designed an elliptic low pass filter in signal source based on the principle of the direct digital synthesis technique. A 7th-order low-pass elliptic filter with the cut-off frequency of Hz is attained. Its 3 dB cut-off frequency is 120 MHz and its attenuation is 60 dB in 145Hz.Its pass band ripple is less than 0.2Db. It has good phase frequency characteristic and speedy attenuation. |
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| Keywords: | DDS |
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