| 基于DDS技术的信号发生器设计与实现 |
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| 引用本文： | 李伟英,钟新跃,谢四莲.基于DDS技术的信号发生器设计与实现[J].电子工程师,2008,34(5):35-37. |
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| 作者姓名： | 李伟英 钟新跃 谢四莲 |
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| 作者单位： | 1. 湖南娄底职业技术学院电子系,湖南省娄底市,417000
2. 湖南人文科技学院通信与控制工程系,湖南省娄底市,417000 |
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| 摘 要： | 介绍了DDS（直接数字频率合成）基本原理，提出以DDS芯片AD9850为核心、利用单片机控制辅以必要的外围电路，构成一个输出波形稳定、精度较高的信号发生器。该信号发生器主要能产生幅度和频率分别可调的正弦波、方波与三角波。实验结果表明，硬件电路结构简单，输出信号频率稳定率优于10^-3，幅值误差低于5％。
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| 关 键 词： | DDS 集成芯片 AD9850 信号发生器 单片机 |
| 修稿时间： | 2007年12月15 |
Design and Implementation of a Signal Generator Based on DDS |
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| LI Weiying,ZHONG Xinyue,XIE Silian.Design and Implementation of a Signal Generator Based on DDS[J].Electronic Engineer,2008,34(5):35-37. |
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| Authors: | LI Weiying ZHONG Xinyue XIE Silian |
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| Institution: | LI Weiying, ZHONG Xinyue, XIE Silian(1. Department of Electronics of Loudi Institute of Professional Techniques, Loudi 417000, China; 2. Department of Communication and Control Engineering, Hunan University of Humanities and Science and Technology, Loudi 417000, China) |
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| Abstract: | In this article, the principle of Direct Digital Frequency Synthesis is introduced and a method for designing a signal generator based on DDS chip of AD9850, using a singlechip to control it and aided by indispensable peripheral circuits is proposed to form a signal generator that out signal tranquilization and high precision. The signal generator can generate sine wave, Square wave and triangular wave, of which amplitude and frequency can be adjusted. Experiment results indicate that the hardware is simple, the stability of out put signal frequency is better than 10^ -3 and amplitude error is under 5%. |
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| Keywords: | DDS AD9850 |
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