摘要
直接数字频率合成技术 (DirectDigitalSynthesis ,简单DDS)是近年来发展起来的一种新型信号合成技术。由于采用了全数字结构 ,它具有合成信号相对频带宽、频率转换时间短、频率分辨率高及合成信号相位连接等优点。介绍了DDS的基本原理 ,详细描述了DDS芯片AD70 0 8特点 ,并给出了基于AD70 0 8芯片的 5MHz扫频信号发生器。
Direct digital synthesis is in recent years to develop synthesizes the techniqne.Because of adopting the total digital construction,it has virtues such as the bread frequency band of synthesized signal,the short time of talking frequency the conversion,the high rate of the frequency distinguish and the continuous phase of synthesized the signal etc.This paper introduced the DDS basic principle,detailed described the AD7008 characteristics of the DDS chip,and gave out the compose of 5 MHz scan frequency signal generator according to AD7008.
出处
《山西电子技术》
2002年第5期33-35,共3页
Shanxi Electronic Technology
