| 新型数字移相器的设计 |
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| 引用本文： | 周英平,刘祖望,王荣博.新型数字移相器的设计[J].计算机工程与设计,2006,27(11):2083-2084. |
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| 作者姓名： | 周英平 刘祖望 王荣博 |
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| 作者单位： | 1. 复旦大学,电子工程系,上海,200433
2. 北京师范大学,电子工程系,北京,100875 |
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| 摘 要： | 介绍了DDS（直接数字频率合成）移相器的基本原理及其信号频率受限的问题,提出了数字移相器的两种新设计：改进型DDS数字移相器和三角函数合成法数字移相器.改进型DDS型移相器提高了相位分辨率;而三角函数合成法在保持移相分辨率较高的前提下,扩展了移相信号的频段.
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| 关 键 词： | 数字移相器 直接数字频率合成 三角函数合成法 相位分辨率 |
| 文章编号： | 1000-7024（2006）11-2083-02 |
| 收稿时间： | 2005-04-16 |
| 修稿时间： | 2005-04-16 |
Design of new digital phase shifters |
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| ZHOU Ying-ping,LIU Zu-wang,WANG Rong-bo.Design of new digital phase shifters[J].Computer Engineering and Design,2006,27(11):2083-2084. |
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| Authors: | ZHOU Ying-ping LIU Zu-wang WANG Rong-bo |
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| Affiliation: | 1. Department of Electronic Engineering, Fudan University, Shanghai 200433, China; 2. Department of Electronic Engineering, Beijing Normal University, Beijing 100875, China |
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| Abstract: | The basic theory of direct digital frequency synthesis(DDS) phase-shifter is introduced.The signal frequency for DDS is limited.Two new digital phase shifters are put forward to solve the problem.One is modified DDS,and the other is trigonometric functions synthesis.The resolution of phase is increased by modified DDS.Furthermore,the second expands the bandwidth of phase-shift signal with high resolution in phase. |
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| Keywords: | digital phase shifter direct digital frequency synthesis(DDS) trigonometric functions synthesis resolution of phase |
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