毕业设计说明书中文摘要信号发生器是一种常见的电子设备，广泛应用于雷达、通信、导航、测控等领域。传统的信号发生器已不能满足电子科技发展的需求。直接频率合成技术（DDS）是新一代的频率合成技术，从相位的概念直接合成波形。基于DDS技术的新一代信号发生器由于其频率分辨率高、频率转换快、相位噪声低等优点而被广泛运用。

本文首先对DDS技术的基本工作原理及其特性进行分析，随后介绍了Altera公司的DDS芯片AD9835，包括它的结构、特点以及使用方法，并给出总体设计方案。其次，选用凌阳16位单片机SPCE061A作控制器，滤波器选用8阶巴特沃思型有源滤波器，在Altium Designer 10上画出电路图，并设计PCB板。最后，通过集成开发环境IDE 2。0。0编写单片机程序，并下载到PCB板内运行调试，在示波器上显示波形。84288

本系统所设计的基于DDS技术的正弦信号发生器经过多次调试，最高能产生10MHz的正弦波波形，实验结果表明本系统的设计能够达到预期的要求。

毕业论文关键词  信号发生器，DDS，AD9835，SPCE061A

毕业设计说明书外文摘要

Title       Design of sine signal generator based on DDS               

Abstract Signal generator is a common electronic equipment, widely used in the field of radar, communication, navigation, measurement and control, etc。。 The traditional signal generator can not meet the needs of the development of Electronic Science and technology。 Direct frequency synthesis (DDS) is a new generation of frequency synthesis technology, from the phase of the concept of direct synthesis of waveform。 The new generation of signal generator based on DDS technology has been widely used because of its advantages of high frequency resolution, fast frequency conversion, low phase noise and so on。

In this paper, the basic principle of DDS technology and its characteristics were analyzed。 And then it will introduce the DDS Altera’s AD9835, including its structure, characteristics and the use of methods, and give the overall design。 Secondly, I choose the 16 single-chip microcomputer SPCE061A as the controller with the 8 order Butterworth type active filter。Then I drew the circuit diagram in the  Altium Designer 10 , and designed PCB board。 Finally, I wrote microcontroller program through the IDE 2。0。0 , and downloaded it to the PCB board to run。I displayed the waveform in the oscilloscope。

The design of the sine signal generator based on DDS technology can produce 10MHz sine wave after several debuggings。The experimental results showed that the design of the system can achieve the desired requirements。

Keywords  signal generator,DDS,AD9835,SPCE061A

目  次

1 绪论 1

1。1 课题研究背景和研究意义 1

1。2 国内外研究现状 1

1。3 论文章节安排 2

2 DDS技术的基本原理与特点 3

2。1 DDS技术的基本原理 3

2。1。1 DDS工作原理与结构总览 3

2。1。2 相位累加器 3

2。1。3 波形存储器 4

2。1。4 D/A转换器 4

2。1。5 低通滤波器 4

2。2 DDS参数计算及分析 4

2。3 DDS的技术特点 5

2。4 芯片AD9835