| 基于直接数字频率合成器的高性能数字电视调谐器本振设计 |
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| 引用本文： | 郑宝辉,张文军,张宏科,孙金荣. 基于直接数字频率合成器的高性能数字电视调谐器本振设计[J]. 上海交通大学学报, 2005, 39(9): 1526-1529 |
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| 作者姓名： | 郑宝辉 张文军 张宏科 孙金荣 |
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| 作者单位： | 北京交通大学,电子信息工程学院,北京,100044;上海交通大学,电子信息与电气工程学院,上海,200030;中国电子科技集团公司第54研究所,石家庄,050081 |
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| 摘 要： | 讨论了数字电视调谐器本振相位噪声，在分析直接数字频率合成器（DDS）的原理及特点的基础上，提出了一种DDS与锁相环（PLL）混合电路用于调谐器本振的方法，应用该方法可使其在所用频率点上无相位截断噪声，从而使调谐器本振的相位噪声大大改善，实验证明，该方法是有效的。
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| 关 键 词： | 直接数字频率合成器 锁相环路 电视调谐器 相位噪声 本地振荡器 |
| 文章编号： | 1006-2467(2005)09-1526-04 |
| 收稿时间： | 2004-06-12 |
| 修稿时间： | 2004-06-12 |
Design of a Local Oscillator for High Performance Digital Television Tuner Based on Direct Digital Synthesizer |
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| ZHENG Bao-hui,ZHANG Wen-jun,ZHANG Hong-ke,SUN Jin-rong. Design of a Local Oscillator for High Performance Digital Television Tuner Based on Direct Digital Synthesizer[J]. Journal of Shanghai Jiaotong University, 2005, 39(9): 1526-1529 |
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| Authors: | ZHENG Bao-hui ZHANG Wen-jun ZHANG Hong-ke SUN Jin-rong |
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| Affiliation: | 1. Inst. of Electronics and Information Eng. ,Beijing Jiaotong Univ. , Beijing100044 ,China; 2. School of Electronic,Information and Electrical Eng. , Shanghai Jiaotong Univ. , Shanghai 200030; 3. China Electronics Technology Group Corporation No. 54 Research Inst. , Shijiazhuang 050081 |
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| Abstract: | This paper discussed the phase noise of a digital TV tuner local oscillator. Based on the analysis of direct digital synthesizer (DDS) theory and feature,it presented a method to design the tuner local oscillator using DDS hybrid PLL(phase lock loop) circuit. According to this method all the DDS output frequencies have no phase truncation noise, so the phase noise of the tuner local oscillator is greatly (improved.) This method was proved by an experiment. |
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| Keywords: | direct digital synthesizer ( DDS) phase lock loop (PLL) television tuner phase noise (local oscillator) |
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