摘要
研究基于直接数字合成(DDS)技术的任意波形发生器(AWG)系统设计。以DDS技术为核心,采用AT89C51单片机作为系统控制部件,利用软件编程实现电压输出的频率预置、步进,输出标准波形。整个系统运用C语言编写相应内部程序,结构紧凑,电路简单,输出波形稳定性好,系统可扩展性强。使用数字信号,克服了模拟信号冗余量大不易处理的缺陷,操作实践表明该系统能可靠运行。
The system of arbitrary waveform generator and its software design based on direct digital synthesizer（DDS） technology have been discussed in detail.A theoretical analysis of the system performance is also given.The multi-waveform generator adopts direct digital frequency,or DDS as the center,which is controlled by AT89C51 to output waveform.Then,it can preset up frequency and step to adjust the step of voltage output frequency.This system has features of compact module,simple circuit,powerful functions and flexible expansion.Digital signal are used to overcome the shortcomings of analog signal,that is,analog signal have large amount of redundancy and are not easy to deal with.The system can run reliably in practice.
出处
《仪表技术》
2010年第9期8-10,13,共4页
Instrumentation Technology
关键词
直接数字合成
任意波形发生器
单片机
direct digital synthesis（DDS）
arbitrary waveform generator（AWG）
single-chip microcomputer
