FM调频发射机模版

编号：

高频电路设计与制作实训实训(论文)说明书

题目：调频发射机

院（系）：信息与通信学院

专业：电子信息工程

学生姓名：

学号： 10011

指导教师：

2012年12 月27日

摘要

调频广播发展迅速，已经取代了原来的有线广播，虽然电视技术发展很快，但是它终究取代不了广播，因为广播的灵活性，收听设备小，投资少，见效快，是电视设备不可取代的，调频小发射机的安装就是一个典型的应用。特别是BA1404在发射机上的运用，它发射距离远，抗干扰能力强。

它可以在收到射频信号后自动开启功放，由于集接收、功放、自动开机于一体，使用方便灵活，给用户带来很大的方便。

从应用层面来讲，调频广播分为有线调频广播和无线调频广播，有线调频广播利用的传输介质是同轴电缆，能够通过已有闭路电视线路，把不同的音频调制到不同的调频载波上，多路音频、电视信号、控制信号共用CATV（有线电视）网络传输，具有节省成本、施工方便、稳定性高、资源利用充分等特点，已被广泛应用于城市、农村、旅游景区等应急安全指挥广播系统的搭建与改造；无线调频广播是将音频信号通过调制、放大和发射等，转换成电磁波利用空气无线传输的方式，其不受地域限制、不受环境影响、不用繁琐布线等优势被广大用户所喜爱，更具有施工简单、收听灵活、扩展方便、性价比高等特点，成为建设城市、农村、旅游景区紧急安全指挥广播的主流方案。

关键词：BA1404；调频发射；振荡器

Abstract

FM broadcasting is developing rapidly, it has replaced the cable broadcasting, although TV technology develop very quickly, but it will not replace radio, because the radio and flexibility, listening equipment, less investment, quick effect, is the television equipment can not be replaced, FM small transmitter installation is a typical application of. Especially in the application of BA1404 transmitter, it far transmission distance, strong anti-interference abilityIt can be received in the RF signal opens automatically after receiving amplifier, because the collection, power amplifier, automatic starting in one, convenient and flexible use, bring great convenience to users.

From the view of application, FM broadcast to cable FM and radio FM radio, cable FM using the transmission medium is a coaxial cable, can pass through the existing closed circuit television, different audio frequency modulation to a different carrier frequency, , signal, control signal shared CATV ( cable television network transmission, ) has the advantages of cost, convenient construction, high stability, making good use of resources and other has been widely used in the city, rural, scenic spots and so on emergency command broadcasting build and transform; wireless FM broadcast is audio signal through modulation, amplified and transmitted,electromagnetic wave using air wireless transmission mode, its not subject to geographical constraints, is not affected by environment, no need of complicated wiring advantages to being loved by the majority of users, has simple construction, flexible, easy to high performance-price ratio, become construction city, rural, scenic spot emergency safety command mainstream radio programme.

Key words：BA1404；FM transmitter；Oscillator

目录

引言 (1)

1 调频发射机系统组成和工作原理 (1)

1.1 调频发射机的结构框图如下 (1)

1.2 调频发射机原理图 (1)

1.3 调频发射机的工作原理 (2)

2 主要硬件的原理功能 (3)

2.1 BA1404 (3)

2.1.1BA1404 的主要特点 (3)

2.1.2引脚功能及工作原理 (3)

2.1.3典型应用 (4)

2.1.4注意事项 (5)

2.2 三端稳压芯片7805 (5)

2.3 高频三极管9018 (6)

2.3.1 引脚识别 (6)

2.3.2 主要用途 (7)

2.3.2 主要特点 (7)

2.4 三极管9013 (7)

2.4.1主要用途 (7)

2.4.2主要特点 (7)

2.5 可调线绕电感 (7)

3 电路板的制作 (7)

4 调频发射机的调试 (8)

5 结论 (9)

谢辞 (10)

参考文献 (11)

附录 (12)