文档介绍：DDS直接数字频率合成器设计实验报告
学院:电子工程与光电技术学院
摘要
直接数字频率合成器(Direct Digital Frequency Synthesizer 简称DDFS或DDS)是一种基于全数字技术,从相位概念出发直接合成所需波形的一种频率合成技术。
本实验利用QuartusII软件设计一个频率及相位均可控制的具有正弦和余弦输出的直接数字频率合成器,具有频率控制、相位控制、测频、显示多种波形、容量扩展等功能(包含附加功能)。实验要求分析整个电路的工作原理,并分别说明了各子模块的设计原理,依据各模块之间的逻辑关系,将各电路整合到一块,形成一个总体电路。之后再完成调试、仿真、编程下载的过程,并对最终结果进行分析,最后总结出在实验过程中出现的问题以及提出解决方案。
Abstract:
Direct Digital Frequency Synthesizer is a technology based on fully digital technique,a bination technique syntheses a required waveform from concept of phase.
This experiment, using QuartusII software to design a frequency and phase all can control the sine and cosine output has direct digital frequency synthesizer with the functions of controlling frequency and phase,measuring frequency and displaying different paper has analyzed the principle of all work and explained the designing principle of different parts integrate the modules to form a whole circuit on the basis of the logic relation between the modules. By debugging, simulating, compiling, programming and analysis of the final results, I put forward a matter and give a settling plan.
关键词: 直接数字频率合成器累加控制波形
Key word: Direct Digital Frequency Synthesizer accumulation control waveform
目录
一、设计内容………………………………………………………………………..4
二、方案论证………………………………………………………………………..4
三、设计要求………………………………………………………………………..4
基本要求……………………………………………………………………….4
提高要求……………………………………………………………………….5
四、各基本字模块功能设计………………………………………………………..5
脉冲发生电路………………………………………………………………….5
频率预置与调节电路………………………………………………………….7
累加器………………………………………………………………………….8
波形存储器(ROM)…………………………………………………………9
相位调节模块………………………………………………………………….12
D/A转换器…………………………………………………………………...13
低通滤波器…………………………………………………………………….13
五、提高部分设计…………………………………………………………………..13
能输出多种波形的波形发生器……………………………………………….14
波形频率控制字、相位控制字的数码管显示……………………………….16
…………………..17
……………………………………………..18
测评电路……………………………………………………………………