1、 I 毕 业 论 文 论文题目 频率计数器电路设计 系 部 机电工程学院 专 业 机电一体化 班 级 机电 0 9（1）班 2012 年 5 月 II 目录 一 摘要 二 概述 三 设计任务书 四 设计原理及方案. 五 整体电路设计 六 单元电路设计 1逻辑控制电路 2锁存器和清零 3脉冲形成电路 4时基电路和闸门电路. 5被测信号幅度扩展电路. 6整体电路图. 七 整体电路调试与仿真. 八 实验心得 参考文献 III 摘要 在电子技术中，频率是最基本的参数之一，并且与许多电参量的测量方案、测量结 果都有十分密切的关系， 因此频率的测量就显得更为重要。 测量频率的方法有多种,其中 电子计数器测
2、量频率具有精度高、使用方便、测量迅速，以及便于实现测量过程自动化 等优点，是频率测量的重要手段之一。电子计数器测频有两种方式：一是直接测频法， 即在一定闸门时间内测量被测信号的脉冲个数；二是间接测频法，如周期测频法。直接 测频法适用于高频信号的频率测量，间接测频法适用于低频信号的频率测量。本文阐述 了用数字电路设计了一个简单的数字频率计的过程。 关键字： 频率 计数器 频率测量 Abstract In electronic technology, the frequency is one of the most basic parameters, and with many electrica
3、l parameters of the measurement program, the measurement results have a very close relationship between the frequency of measurement, therefore it is even more important. Measuring frequency of means, including electronic counter measure frequency with high precision, easy to use, rapid measurement,
4、 and measurement is easy to realize the advantages of process automation, is an important means of frequency measurement. Electronic counter frequency measurement in two ways : one is the direct frequency measurement Law, or within a certain time gates of measured signal pulse number; two is the ind
5、irect frequency measurement Law, such as cycle frequency measurement method. Direct frequency measurement Law is applicable to the high frequency signal frequency measurement, indirect frequency measurement Law is applicable to low-frequency signals in the frequency measurement. This paper expounds the digital circuit design of a simple digital frequency meter process. Keywords: frequency counter frequency measurem
