基于CPLD的多波形信号发生器设计毕业论文

摘 要随着电子技术的发展，电子测量技术领域、教学与科研领域的需求增长，传统波形发生器已越来越难以胜任如此高的需求。与传统波形发生器相比，基于CPLD的波形发生器具有准确性高、稳定、灵活、成本低、重复利用率高等优点，是波形发生器发展的大势所趋，具有广阔的市场前景。本课题要求用可编程逻辑器件设计一个多波形发生器，该波形发生器能产生递增斜波、递减斜波、阶梯波、正弦波、方波、三角波并由用户选择输出所需其中一种波形。本论文通过VHDL语言使用文本输入法，新建工程，通过设计输入、编译、仿真完成各种信号的设计，然后生成元器件，再使用原理图输入法完成各部分的整合，从而形成一个完整的多波形信号发生器，而后经过锁定引脚下载数模转换可以在示波器上观察到波形。关键词:VHDL，模拟电路，数字通信系统，数模转换AbstractWith the development of electronic technology, the growth in the field of electronic measuring technology, teaching and research needs in the area, the traditional waveform generator has been increasingly difficult to be qualified for such a high demand. Compared with traditional waveform generator, based on CPLD waveform generator has high accuracy, stability, flexibility, and low cost, repeated utilization of the advantages of the development trend of the waveform generator, and has broad market prospects. This topic requires a multi-waveform generator design with programmable logic devices, the waveform generator can generate incremental ramp descending ramp, ladder wave, sine wave, square wave, triangle wave by the user to select the output desired one waveform . VHDL language using a text input method, new construction this paper, through the design input, compile simulation to complete the design of a variety of signal, and then generate the components, and then use schematic entry method to complete the integration of the various parts, so as to form a complete waveform signal generator, then after locking pin downloading digital to analog conversion can be observed on an oscilloscope to the waveform.Keywords: VHDL, analog circuitry, digital communication systems, digital-to-analog conversion

目 录

摘 要 1Abstract 2目 录 3第一章 绪论 41.1 选题的依据及课题的意义 41.2 研究概况及发展趋势综述 41.3 系统组成 51.4 研究内容及实验方案 5第二章 相关理论概述 72.1 信号发生器概述 72.2 VHDL语言介绍 72.3 Quartus II 概述 8第三章  主要功能的设计与实现 103.1 功能模块的划分 103.2 主要功能的实现 103.2.1方波的实现 103.2.2三角波的实现 123.2.3正弦波的实现 143.2.4阶梯波的实现 163.2.5四选一输出波形选择模块 173.3 多波形信号发生器 19第四章 外围电路设计 214.1基于MAXII EMP570T100C5芯片的开发板介绍 214.2 D/A转换器 214.3示波器观察图形 23结 论 25参 考 文 献 26致 谢 27