基于FPGA的等精度数字频率计IP核的设计.doc

摘要伴随着集成电路(IC)技术的发展电子设计自动化(EDA)逐渐成为重要的设计手段，已经广泛应用于模拟与数字电路系统等许多领域。电子设计自动化是一种实现电系统或电子产品自动化设计的技术，它与电子技术、微电子技术的发展密切相关，它吸收了计算机科学领域的大多数最新研究成果，以高性能的计算机作为工作平台，促进了工程发展。数字频率计是一种基本的测量仪器。它被广泛应用与航天、电子、测控等领域。本文首先综述了EDA技术的发展概况，VHDL语言的历史及其优点然后介绍了频率测量的一般原理FPGA运用VHDL编程，利用FPGA(现场可编程门阵列)芯片设计了一个8位数字式等精度频率计，该频率计的测量范围为1HZ-20MHZ,利用QUARTUS Ⅱ集成开发环境进行编辑、综合、波形仿真，并下载到器件中，经实际电路测试，:等精度；VHDL语言频率测量数字频率计Abstract The Electronic Design Automation (EDA) technology has become an important design method of analog and digital circuit system as the integrated circuits growing. The EDA technology, which is closely connected with the electronic technology, microelectronics technology and computer science, can be used in designing electronic product automatically. Digital frequency meter is a basic measuring instruments. It is widely used in aerospace, electronics, monitoring and other fields. With equal precision frequency measurement accuracy to maintain a constant, and not with the measured signal varies. We firstly present some background information of EDA, FPGA/CPLD,VHDL and the EDA software platform QUARTUS Ⅱin this thesis; then introduced the general principle of frequency measurement, utilization of precision measuring principle, using VHDL programming, use of FPGA (Field Programmable Gate Array) chip design such as the precision of a digital frequency meter, this frequency meters measuring range is 1HZ-20MHZ,use QUARTUS Ⅱintegrated development environment for editing, synthesis, wave simulation, and download to the FPGA device, by the actual circuit testing, simulation and experimental results show that the frequency meter has high practical and reliability. Keywords: qual precision, VHDL, Frequency measurement, digital frequency meter 目 录 摘 要 I Abstract II 第一章 绪 论 1 1.1课题背景 1 1.2课题来源目的和意义 2 1.3 本文主要研究内容 3 第二章 FPGA技术及开发环境介绍 4 2.1 基于EDA的FPGA开发 4 2.1.1 FPGA简介 4 2.1.2用FPGA进行开发的优缺点 5 2.2 硬件描述语言(HDL) 6 2.2.1VHDL语言简介 7 2.2.2利用VHDL语言开发的优点 7 2.3 QuartusII概述 8 第三章 等精度频率计原理分析 10 3.1引言 10 3.2 数字频率计的主要技