超外差焊接收音机课设论文

更新时间:2024-06-22 11:20:01 阅读量: 综合文库 文档下载

说明:文章内容仅供预览,部分内容可能不全。下载后的文档,内容与下面显示的完全一致。下载之前请确认下面内容是否您想要的,是否完整无缺。

高频课设论文

目录

摘要...................................................................................................................... III Abstract ................................................................................................................ IV 第一章 绪论.......................................................................................................... 1

1.1实习的目的.............................................................................................. 1 1.2实习的意义.............................................................................................. 1 1.3章节安排.................................................................................................. 1 第2章 DXP及印刷电路板基础技术................................................................. 2

2.1 Protel DXP技术简介 .............................................................................. 2 2.2 印刷电路板设计流程........................................... 错误!未定义书签。 第三章 总体方案设计.......................................................................................... 2

3.1超外差及其工作原理.............................................................................. 1

3.1.1 什么叫超外差.............................................................................. 1 3.1.2 超外差收音机的工作原理.......................................................... 2 3.2设计流程.................................................................................................. 3

3.2.1原理图........................................................................................... 3 3.2.2 元器件.......................................................................................... 3 3.2.3 焊接准备...................................................................................... 4 3.3本章小结.................................................................................................. 5 第4章 焊接收音机硬件设计.............................................................................. 6

4.1电阻.......................................................................................................... 6 4.2电解电容和瓷片电容.............................................................................. 6 4.3三极管...................................................................................................... 6 4.4中周及磁棒线圈...................................................................................... 6 4.5双连拨盘.................................................................................................. 7 4.6变压器...................................................................................................... 7 4.7发光二极管和喇叭.................................................................................. 7 4.8电位器...................................................................................................... 7 4.9本章小结.................................................................................................. 7 第五章 系统调节与调试...................................................................................... 8

5.1 故障检测................................................................................................. 8

5.1.1检测目的、前提、要领及方法 .................................................. 8 5.1.2判断故障位置 .............................................................................. 8 5.1.3故障检修实例 .............................................................................. 9

I

高频课设论文

5.2 调试步骤............................................................................................... 10

5.2.1调整三极管的工作点................................................................. 10 5.2.2调整中频频率............................................................................. 11 5.2.3调整频率范围............................................................................ 11 5.2.4 统调............................................................................................ 12 5.3本章小结................................................................................................ 12 第六章 总结与展望............................................................................................ 13 第七章 谢辞........................................................................................................ 14 附件...................................................................................................................... 15

II

高频课设论文

摘要

当今的社会是一个新技术层出不穷的时代,科技迅速发展,在电子领域的发展更是迅速,收音机越来越呈现“非居家”收听的新趋势,私家车载、城市交通网络、超市卖场、大专院校、居民社区、大型国企等户外或半户外空间都是收音机未来必争之地。特别是随着交通台的发展,拥有私家车的车主和大批出租车司机,收听收音机的频率和时长正直线上升,广播以往那种只有“中老年收听”的印象逐渐淡出。

本次课程设计就是用中频变压器,并利用三极管,电阻,电容构成调谐回路、变频回路(包括本振电路、混频电路和选频电路)、中频放大(中放)回路、检波及AGC回路、低放级回路、功放级回路,组装成一个收音机,进而达到收台的效果

关键词:中频变压器,AGC,收音

III

高频课设论文

Abstract

Today's society is a new technology emerge in endlessly, the rapid development of science and technology, more rapid development in the field of electronics, radio is increasingly a new trend of \the supermarket stores, colleges and universities, communities, large state-owned enterprises such as outdoor or half open space is the radio campaigns in the future. Especially with the development of communication radio, with the owners of private cars and a large number of the taxi driver, listening to the radio frequency and length is soaring, broadcasting in the past that only \out gradually.

This course is designed with the medium frequency transformer, and the use of transistor, resistor, capacitor constitute a tuned circuit, inverter circuit, including the local oscillator circuit, mixing circuit and frequency selective circuit), intermediate frequency amplifier (put) circuit, detection and AGC circuit level, low level circuit, power amplifier circuit, assembled into a radio, and then to achieve the effect of charge station

Key words: intermediate frequency transformer, AGC, the radio

IV

高频课设论文

第一章 绪论

1.1实习的目的

此次课程设计就是通过对一只正规产品中夏牌S66E型收音机的安装、焊接、了解电子产品的装配全过程,训练动手能力,掌握元器件的识别,简易测试,及整机调试工艺。并能收到广播!此型号收音机简单、易制作,效果明显,对我们刚刚入门电子行业的来说,无不增大了对未来的信心。

1.2实习的意义

无线电收音机不仅涉及到了低频课程,这对我们理解课本中信号放大,信号处理方面有很多帮助。同时还涉及到高频课程,化无形的理论为有形的的实物,让我们理解了收音机的工作原理和收音机的工作过程。为本学期学习的高频课程提供了更深层次的理解实践机会。更重要的是,让我们在实际动手过程中提高了焊接技术,元件识别等方面的实用性的能力!此外还涉及了电磁波方面的知识,让我们体会到了电磁波的强大的用处!总之,通过本次课程设计,我们不但增强了动手能力,还结合书本知识反思了学到的东西!

1.3章节安排

第一章为绪论,论述做收音机的意义和目的;

第二章为收音机基础技术的介绍,论述制作收音机过程中运用到的仿真软件及技术、硬件简介;

第三章为总体方案设计,论述了中夏牌收音机的设计思路和设计流程; 第四章为的硬件设计,论述了收音机中运用的硬件的特征和设计; 第五章为系统调试与测试,论述了做好收音机的调试和测试; 第六章为总结与展望,论述了我个人对这次实习的总结和对以后学习的展望;

第七章为谢辞,表达了我对帮助过我的黄老师和同学的感谢,对学院提供的实习机会的感激;

1

本文来源:https://www.bwwdw.com/article/pjd3.html

Top