论文编号:JD827 论文字数:5014,页数:13
基于AVR单片机幅度可调的DDS信号发生器
摘 要：高精度信号源在科研、通信系统、教学实验以及各种电子测量技术中起着举足轻重的作用。直接数字频率合成（DDS）是近年来发展非常迅速的一种新型频率合成技术，它具有频率分辨率高、相位噪声低、频率切换时间短、频率稳定度高、易于调整及控制灵活等特点。
关键词：正弦信号发生器;直接数字频率合成;ADC
DDS Signal Generator Based on
The AVR Magnitude of Single-chip
Abstract：The frequency synthesizer is a very important signal source in some area such as the research, the correspondence system, the teaching experiment and various electronic devices. The direct digital frequency synthesize (DDS) is a new technology developing quickly in recent years. Advantage is taken from the inherent high resolution of the DDS, noise immunity of the loop, the short time of the frequency change etc. The signal source of DDS has many advantages including the small body, the low cost, the small power consume, the vivid control, and the high accuracy of output signal.
Key words: Sine-wave Generation;DDFS; ADC
目录
摘 要 I
Abstract I
1 引言 1
1.1 DDS信号发生器的发展及现状 1
1.2 DDS概述 1
1.3 DDS设计原理 1
2 系统的设计 2
2.1 单片机控制系统 2
2.2 单片机的功能介绍 2
2.3 JTAG接口程序载入 3
2.4 键盘输入控制设计 4
2.5 液晶输出显示 5
2.6 整体单片机端口资源分配 6
3频率合成系统的设计 6
4 系统软件设计 7
4.1 信号产生部分程序设计 7
4.2 液晶显示程序设计 8
4.3 键盘控制程序设计 9
参考文献 10
谢 辞 11
