摘要
DDS技术是频率合成中应用较多的技术之一。在对DDS输出噪声进行理论分析后选择了AD9851作为信号源发生芯片。根据芯片特性和信号源人机交互方便、简单实用并能嵌入到采集系统的原则,采用VB程序建立PC机与AT89S52的串行通信联系实现了对AD9851的控制,在此基础上完成了正弦波信号源的制作。把PC机使用的灵活性与单片机成熟的技术联系起来,在信号源制作上做了一次有意义的尝试。
Direct Digital Synthesis （DDS） is one of the most used techniques in frequency synthesis. After theoretical analysis of the output noise of DDS. AD9851 is chosen as the main sine signal generator chip. Based on the characteristics of AD9851 and the principle of the convenient human- computer interaction, simplicity, practicality, as well as capable of being embedded into the collection system. Serial communication between PC and AT89S52 is realized by virtue of Visual Basic program. which can successfully control the AD9851, thus the sine signal generator is achieved. It＇s a significant attempt to make a signal generator by combing the flexible PC and the mature technology in single chip.
出处
《现代电子技术》
2008年第1期44-47,共4页
Modern Electronics Technique
基金
国家重点基础研究发展计划项目(973计划)(2005CB623708)
