摘要在当今的社会，随着电脑、手机、MP3等播放器的盛行，收音机的使用逐渐变少，而人们所使用的老式收音机依旧是通过手动操作来调换频道，这样的操作有些不方便，甚至可能会出现一些问题，比如灵敏度不高，频率不准确等，因此会带来很大的误差。而TEA5767模块含有高性能的电路，它改善了传统手动收音机的缺点，具有接收灵敏度高、频率显示准确的特点、并且不需要手动操作，可以实现自动搜台的功能。51810

本系统是基于单片机的数字FM收音的设计。设计方案可以分为两大部分：硬件设计和软件设计。其中硬件部分是通过单片机和收音模块的结合，从而实现信号的接收功能，在本设计中用于调频并接收信号的核心器件是TEA5767模块。在软件部分 利用开发工具keil来编写代码，通过单片机来控制收音模块，并在LCD1602显示屏上显示当前所接收到的电台频率信息，收音模块输出音频后，并通过功率放大器放大，由扬声器输出声音，从而实现本系统的功能。

该论文有图13幅，表23个，参考文献10篇。

毕业论文关键词：数字调谐  STC89C52  TEA5767模块  TBA2822

The Design of Digital FM Radio Based on Single Chip Microcomputer

Abstract In today's society, with the popularity of computers, mobile phones, MP3 player, use the radio gradually become less, and people are using old radio is still the manual operation to change the channel, such operations are not convenient and may even appear some problems, such as the sensitivity is not high, frequency is not accurate, it will bring great error. And TEA5767 module comprises a high performance circuit, it improved the shortcomings of traditional manual radio, has received high sensitivity, frequency display accurate, and does not require manual operation, automatic station search function can be realized.

This is the design of digital FM radio system based on mcu. The design can be pided into two parts: hardware design and software design. And a part of hardware is through a combination of MCU and radio module, so as to realize the function of the received signal, in the design for frequency modulation and receiving signal is the core device TEA5767 module. KEIL development tools in the use of the software part of the code through the MCU to control the radio module, and the received radio frequency information is displayed on the LCD1602 display, audio from radio module, and the power amplifier amplification, by the sound output from the speaker, in order to achieve the function of the system.

Key words：Digital tuning  STC89C52  TEA5767module  TBA2822

目  录

摘要I

Abstract....Ⅱ

目录Ⅲ

图清单.....Ⅳ

表清单.....Ⅴ

1绪论......1

2调频收音机工作原理 2

2.1外差式调频收音机的工作原理 2

2.2 数字FM收音机的工作原理 2

2.3 数字FM收音机的功能设计 3

3硬件电路设计 4

3.1 硬件组成 4

3.2 调频电路及其设计 8

3.3 单片机控制与显示电路 9

3.4 电源电路与功率放大电路 10

4软件设计 12

4.1键盘与显示函数设计 12

4.2数字调节与收音控制程序设计 13

5结论 20

参考文献 STC89C52单片机的数字FM收音机设计:http://www.751com.cn/zidonghua/lunwen_55578.html