摘要
直接数字合成(DDS)具有分辨率高、频率变换快、应用广泛等优点。设计了一种基于CPLD控制的DDS方式的高速信号源系统。该系统利用CPLD对DDS进行高速实时控制可以产生任意频率的正弦、方波信号,并且具有频率范围宽、步进小、幅度和频率的精度高等优点。文中给出了部分AD9850芯片和CPLD的硬件接口和程序代码。
The direct digital frequency synthesizer（DDS） has a characteristic of strong resolving power, changing quickly and abroad application. In this paper it designs a high speed signal source based on DDS which is controlled by CPLD. The CPLD takes a high-speed and real-time control on DDS to generate sine wave and square wave on any frequency. This system has many strong- points, such as wide-frequency-range, small-step, high-precision on amplitude and frequency and so on. The hardware interface and code of AD9850＆CPLD are partly given in this paper.
出处
《山西电子技术》
2008年第4期36-38,共3页
Shanxi Electronic Technology
