数字调频立体收音机

论文编号:JD722  论文字数:11420,页数:33

摘 要
调频收音机（FM Radio）一直在人们的生活娱乐中占有非常重要的地位。从老式的晶体管收音机到今天的网络收音机，说明通过广播享受生活一直是人们喜欢的生活方式。如今，随着消费类电子的兴起和繁荣以及数字电子的发展，广大从事消费类电子设计的厂商都不忘在诸如MP3、智能手机、便携式Video播放器等产品中嵌入FM部分。传统的调频解决方案存在电路体积大、调谐不方便、稳定性欠佳等弊端。为了解决上述问题，众多半导体公司纷纷寻求调频接收机的ASIC解决途径。本文介绍了数字调频立体声收音机的设计与实现。其解决了传统的调频方案中体积大、调谐不方便、稳定性不好等这些缺点。在本文中主要介绍了该设计的硬件电路、软件设计流程、系统测试。数字调频立体声收音机的MCU采用AT89S52单片机，单片机是本系统的核心器件。由收音机模块TEA5767实现频率的接收，LCD1602实时显示时间、频率以及音量，用24C16来存储频率，以TDA2822作为音频功率放大器，并通过数字电位器X9313调音量。
本设计通过按键调节频率，用DS1302实时显示时间，并可通过按键修改时间。

关键词：单片机 数字调频 TEA5767 24C16 TDA2822 X9313

Abstract
The frequency modulation radio (FM Radio) has been occupying an important position in people life of amusement. From the transistor radio of old style to the network radio today, we can see that enjoying life though broadcast is the life style that people always like. Now, with the rise and prosperity of consumption electronic products and the development of numerical electronic products, the majority of the electronic products designers of the manufacture always imbed FM part in the products such as the MP3, intelligence cellular phone, easy take-away Video etc.  But the traditional frequency modulated solution has many problems such as electric circuit physical volume too big and adjust frequency modulation inconvenient, the stability not so well etc. In order to resolve the above-mentioned problems, numerous semi-conductor companies look for the ASIC frequency modulation receiver to solve these problems. This thesis introduces the design and the realization of numerical frequency modulation high fidelity radio. It solves the problems of electric circuit physical volume too big and adjusts frequency modulation inconvenient, the stability not so well etc. This thesis mainly introduces the hardware electric circuit, software design process, testing system. The MCU of digital frequency modulation high fidelity radio adopts the single slice machine of AT89S52; and the single slice machine is the core spare part of this system. In this system radio mold piece TEA5767 is used to carry out frequency to receive, the LCD1602 to show time, frequency and volume, an iron electricity storage equipment of 24 C16 A to store  frequency, TDA2822 to enlarge audio frequency power, and digital electric machine X9313 to modulate voice volume.
This design regulates frequency through a key, uses DS1302 solid hour to show time, and modifies the time though the key.

Keywords:Microcontroller FMdigital  TEA5767  24C16 TDA2822  X9313

目 录
摘 要……………………………………………………………………………...1
Abstract………………………………………………………………………….2
前 言……………………………………………………………………………...4
第一章  系统的结构及功能介绍……………………………………………….5
     1.1 系统的工作原理概述…………………………………………………5
     1.2 系统的特点和使用……………………………………………………6
         1.2.1 系统的特点………………………………………………….6
         1.2.2 使用说明……………………………………………………….6
第二章   硬件系统的设计……………………………………………………...8
     2.1 调频收音功能的实现和电路………………………………………..10
         2.1.1 调频收音机功能的实现……………………………………..10
         2.1.2 TEA5767的电路连接…………………………………………14
     2.2 音量调节和音频放大电路…………………………………………..16
         2.2.1 音量调节…………………………………………………….17
         2.2.2 音频放大电路………………………………………………..18
     2.3 时钟模块DS1302……………………………………………………18
         2.3.1 DS1302引脚功能表和内部结构图………………………….19
         2.3.2 DS1602 的控制字节说明……………………………………19
     2.4 数据存储器24C16…………………………………………………..22
         2.4.1 24C16的特性及引脚定义……………………………………22
         2.4.2 24C16与单片机连接原理图…………………………………23
     2.5 键盘和显示电路……………………………………………………..23
         2.5.1 键盘………………………………………………………….23
         2.5.2 显示………………………………………………………….24
第三章   系统软件设计……………………………………………………….26
     3.1 主程序部分…………………………………………………………..26
     3.2 电台调谐功能软件流程图…………………………………………..26
     3.3 时钟设计功能软件流程图…………………………………………..28
     3.4 音量调节功能软件流程图…………………………………………..29
第四章   系统测试………………………………………………………….....30
     4.1 TEA5767频率输入方式和存储……………………………………..30
     4.2 LCD显示……………………………………………………………..30
     4.3 时钟模块DS1302……………………………………………………30
     4.4 系统主要技术指标…………………………………………………..30
第五章   结束语……………………………………………………………….31
致 谢…………………………………………………………………………….32
参考文献………………………………………………………………………...33