毕业设计（论文）基于fpga的数字频率计设计.docVIP

目 录 TOC \o 1-3 \u 摘要 I 第一章 数字频率计系统方案分析及比较 1 1.1 方案构想 1 方案比较及选用依据： 2 第二章 基本测频方法概述 4 计数式直接测频法 4 计数式直接测周期 4 2.3 等精度测量原理 5 第三章 数字频率计系统 7 数字频率计系统框图 7 数字频率计系统部件简介 7 放大电路的方案选择 8 整形电路 9 整形电路 9 3.3 FPGA控制电路及FPGA芯片选型 10 第四章 数字频率计程序设计 11 数字频率计系统模块划分结构 11 计数模块 11 门控模块 15 分频模块 17 4.5 寄存器模块 20 多路选择模块 21 动态位选模块 22 译码模块 23 4.9 顶层电路 26 结论 29 参考文献 29 致 谢 31 基于FPGA的数字频率计设计 摘要：技术不断发展，频率测量要求的精度越来越高，测量方法也越来越多。在电子技术应用中，频率这个电参量在各领域占有非常重要的地位，如何准确测量高频信号的频率是衡量频率计性能的一个很重要的指标。基于现阶段对频率测量的要求，另一方面随着FPGA—可编程逻辑性器件的高速发展，使用FPGA实现频率测量，不需要考虑硬件的工艺对设计的影响，可以大大提高频率测量的准确度和可靠性。本文主要描述了数字频率计的Verilog HDL实现，使用自顶向下的设计方法，利用模块化的思想对数字频率计进行详细设计，仿真调试以及板级调试等等。充分利用了FPGA的硬件可编程性，以Verilog HDL语言为基础的强大综合技术，使得FPGA能够在各级编译、综合、调试、仿真后实现各种复杂的数字系统，并应用于各类电子技术中。 关键词：频率计 可编程逻辑性器件 Verilog HDL Digital cymometer based on FPGA Abstract：With continuous development of technology, the requirements of the frequency measurement accuracy is higher and higher, the measurement method is also more and more. In electronic technology applications, the frequency of the electrical parameters in various fields occupies very important position, how to accurately measure the frequency of the high frequency signal measure frequency meter is an important indicator of performance. In electronic technology applications, the frequency of the electrical parameters in various fields occupies very important position, how to accurately measure the frequency of the high frequency signal measure frequency meter is an important indicator of performance. Based on the demand of the present stage of frequency measurement, on the other hand, with the high-speed development of the FPGA - programmable logic devices, using FPGA to realize frequency measurement, do not need to consider the effect of the technology for the design of hardware, can greatly improve the accuracy and reliability of frequency measurement. This paper mainly describes the Verilog HDL to implement of digital frequency meter, using the top-down design method, using the modular thought to t