1、 I 电视伴音红外转发器设计 学生: 指导教师: 内容摘要:近年来中国经济高速发展,伴随经济高速发展人们对电子产品的消费也越 来越多,电视机更是家家户户必备的电子产品。作为电视机的重要组成部分“电视伴音 红外转发器”也越来越受到大家关注。电视伴音红外转发器有许多优点,列如:结构简 单、方便制作、无干扰、噪声低等。看电视时电视伴音信号通过红外转换器发射出去, 人们可以用红外线耳机接收。 这样在室内看电视时戴上红外线耳机就可以不影响别人工 作或学习。 同时减少了因看电视而产生的家庭矛盾, 使用起来也灵活, 没有引线的拖累, 可谓一举数得。就因为以上红外伴音转发器的种种优点所以我写了这篇文章,本文将
2、重 点介绍电视伴音红外转发器的基本理论原理、原理构造图、基本应用、各项优点缺点。 同时也会简单介绍电视伴音信号和红外线。 关键词:发射 接收 红外线 II Television sound infrared transponderTelevision sound infrared transponder Content abstract:Content abstract: Chinas rapid economic development in recent years, along with the rapid economic development of consumer electro
3、nic products also more and more people, TV is every family essential electronic products. As an important part of the TV “television sound ir repeater“ is also more and more get attention. Television sound infrared repeater has many advantages, such as: simple structure, convenient production and no
4、 interference, low noise, when watching TV television sound signal transmission out by infrared transducer, people can use the infrared earphone receiving. Such indoors watching TV on the infrared earphone can not affect other people work or study. At the same time reduce the family conflicts caused
5、 by watching TV, use rise also flexible, no lead, YiJuShuDe. Because more than the virtues of infrared audio repeater so I wrote this article, this article focuses on the basic theory of infrared transponder television sound principle, the principle of structure map, basic application, the advantage
6、s disadvantages. It will also introduce television sound signals and infrared light. Keywords:Keywords: launch receive infrared III 目 录 1 选题背景 1 11 模块选择 1 1.1.1 语音放大模块选择 . 1 1.1.2 信号发送与接受模块的选择 . 1 1.1.3 信号功率放大模块的选择 . 1 1.2 最终决定方案 2 2 电路设计 2 2.1 流程图 2 2.2 单元电路设计 3 2.2.1 发射部分 . 3 2.2.2 接收部分的设计 . 4 3 电路硬件装置 5 3.1 发光二极管 5 3.2 三极管驱动放大器 6 3.3 红外发光管 9 3.4 电阻 10 3.5 电容 11 3.6 红外接收管 11 3.7 音频放大器(LM386) 13 3.7.1 芯片 LM386 的特点 . 14 3.7.2 LM386 的典型应用 15 4 电路原理及原理图 17 4.1 电路原理 17 4.2 原理图 17 5 组装调