等脉冲频率调制的原理与应用

范文编号:JD802  范文字数:6376,页数:15

等脉冲频率调制的原理与应用

摘 要

本文主要阐述了等脉冲频率调制的原理及实现,简单介绍了脉冲频率调制方式和光纤通信系统中模拟信号传输主要采用的三种调制技术,并做了粗浅的比较,分析了脉冲频率调制光传输系统原理及系统模块功能,深入研究了等脉冲频率调制的基本原理,利用74LS123和LM741实现脉冲频率调制。

关键词:光纤通信；脉冲频率调制;比较器;单稳态触发器

The principle and realization fashion of pulse frequency modulation
Abstract
 This article described the principle and realization and realization means of the pulse frequency modulation.Simply introducing the common pulse frequency modulation means by the optical communication system the three main modulation technique used in analog transmission of and doing a simple comparison; Analyzing the principle of the pulse frequency modulation optical transmission systems and system modules,deeply researching the basic principles of frequency modulation;Introduced adouble-steady-state trigger 74LS123 and the LM741 comparator pin function,and by 74LS123 and LM741 to achieve pulse frequency modulation;Finally,switching amplifier Class Eamplifier to increase its power output,making this system in the optical fiber communication technologies are widely applied.
Keywords: optical fiber communication;pulse frequency modulation;voltage comparator;steady-trigger;

目录

摘 要 I
Abstract II
1 前言 1
2 等脉冲频率调制的简介 1
3 等脉冲频率调制的基本原理 2
3.1 脉冲频率调制光传输系统模块功能分析 2
3.2  基本原理介绍 3
4 等脉冲频率调制的实现 4
4.1 实现方案 4
4.2 硬件介绍 4
4.3 实验电路图 7
4.4 实验结论 8
5  总结 9
参考文献 9
谢   辞 11

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