摘要
本文首先介绍了DDS(直接数字合成)的基本原理,及AD7008芯片的组成结构和工作原理。之后介绍了基于DDS芯片AD7008的信号发生及调制器的设计思路,及其与工业控制计算机ISA总线的接口电路的设计,并分析了QAM、AM、FSK等几种通信领域中最常用的信号调制方式在该信号发生及调制器上的具体实现方法。
This paper introduces the basic principles of DDS （Direct Digital Synthesis）, and the functional constitution and running mechanism of AD7008. Then the design of the signal generator and modulator based on AD7008, along with its interface circuit with ISA bus of industry control computers is presented. At last, realization schemes of implementing QAM, AM, FSK on the designed signal generator and modulator are analyzed in detail.
出处
《微计算机信息》
2009年第5期252-254,共3页
Control & Automation
