基于dds的数字式函数信号发生器设计学士学位论文

本科生毕业设计（论文）中文题目： 数字式函数信号发生器设计 英文题目： A D ESIGN OF F UNCTION S IGNAL G ENERATOR B ASED ON DDS 摘 要直接数字合成是一种新的频率合成方法,是频率合成技术的一次革命,随着数字频率集成电路和微电子技术的进展,直接数字频率合成技术日益显露出它的优越性。本文利用直接数字频率合成器(DDS)与单片机控制技术,研制和设计了高频率、高稳定度的函数信号发生器。在系统总体方案设计中,将 DDS 信号发生器分成 8 个模块:键盘模块、单片机模块、显示模块、DDS 模块、电源模块、采样保持与 A/D 转换模块、低通滤波器模块和放大模块，按模块进行软硬件设计。系统的硬件设计，完成了系统的硬件总体设计,并对具体实现电路进行详细的分析和设计。在系统软件设计中,对系统软件的主要功能按模块进行了介绍。关键词：信号发生器 DDS 单片机 频率 设计 ABSTRACT The Direct Digital Frequency Synthesis is a kind of new frequency synthesis method and also a revolution in the frequency synthesis techniques. With the development of digital integrated circuits and microelectronic techniques, DDS exhibits its advantages day by day. This Paper introduces a high frequency and high stability signal generator design based on MCU control technology and direct digital synthesis (DDS). In the over all system design, the DDS signal generators would be classified into 8 module: keyboard module, single chip module, display module, DDS module,power module,sample and hold module,A/D converse module,low-Pass filter module and amplification module,where both software and hardware design are accomplished according to each module.In the design of system hardware,specific analysis and design for how to realize the electric circuits had been carried out.In the design of system hardware,specific analysis and design for how realize the electric circuits had been carried out. In the design of system software,their main functions were introduced according...