基于51系列单片机的调频收音机的设计
摘 要
收音机从它的诞生至今,不仅方便了媒体信息的传播,也推进了现代电子技术和更先进的电信设备的发展。从分立元件组成的收音机到由集成电路组成的收音机,从普通的调幅收音机到高级调频收音机。调频收音机具有灵敏度高、工作稳定、选择性好及失真度小等优点。以较高的技术含量和较高的音质得到了广泛的欢迎。
本课题主要研究调频收音机的设计全过程,介绍一种基于51系列单片机的调频收音机,能够实现范围在88.5MHz~108.5MHz之间的自动调频,步进0.1M可调。该系统主要由电源模块、控制模块、显示模块和调频模块,功放模块组成。它以51单片机为核心,控制TEA5767调频芯片及LED数码管实现调频收音与显示频率,并通过功放播音。该设计将是一台工作稳定、高性能、体积小、易调谐、接收灵敏度高、参考频率选择灵活、可实现自动搜台的调频收音机。
关键词:调频收音机; 51系列单片机; TEA5767芯片
Abstract
Radio from its birth date, not only facilitate the media dissemination of information, but also promoted the modern electronic technology and the development of more advanced telecommunications equipment. From discrete components radio to consist of Integrated Circuits Radio, from the ordinary to the senior FM Radio AM FM radio. FM radio has the advantages of high sensitivity, stable work, good selectivity and low degree of distortion etc.. With high technology content and high quality has been widely welcomed.
The main topic on FM radio design process, based on the51 Series MCU FM radio, can realize the automatic frequency range between 88.5MHz~108.5MHz, step0.1M adjustable. The system is mainly composed of a power supply module, control module, display module and a modulation module, power amplifier module. With51 single-chip microcomputer as the core control chip, TEA5767FM and LED digital control to achieve the FM radio frequency power amplifier and display, and the broadcast. The design will be a stable work, high performance, small volume, easy tuning, high receiving sensitivity, frequency reference selection is flexible, can realize the automatic searching FM radio. Key words: FM radio;The 51 Series MCU; TEA5767 chip
目录
第一章 绪论………………………………………………………………………………….1 第二章 系统总体设计方案 …………………………………………………………………2
2.1设计的主要任务 ……………………………………………………………………2 2.2设计的主要要求 ……………………………………………………………………2 2.3调频波的特点 ………………………………………………………………………2 2.3.1调频波的形成 ……………………………………………………………………2 2.3.2频偏 ………………………………………………………………………………2 2.4广播频段和传播特点 ………………………………………………………………2 2.5调频广播的优点 ……………………………………………………………………2 2.6调频接收机的主要技术指标有 ……………………………………………………3 2.7系统各模块方案论证和选择 ………………………………………………………3 2.7.1控制模块 …………………………………………………………………………4 2.7.2调频模块 …………………………………………………………………………4 2.7.3键盘模块 …………………………………………………………………………4 2.7.4显示模块 …………………………………………………………………………4 2.7.5功放模块 …………………………………………………………………………5 2.7.6电源模块 …………………………………………………………………………5 第三章 系统硬件电路的设计与实现 ………………………………………………………6
3.1 控制模块设计………………………………………………………………………6 3.2 调频模块设计………………………………………………………………………6 3.3 键盘电路……………………………………………………………………………7 3.4 显示模块设计………………………………………………………………………8 3.5 功放模块设计………………………………………………………………………8 3.6 电源模块设计………………………………………………………………………9 第四章 系统的软件设计……………………………………………………………………10
4.1 主程序设计 ………………………………………………………………………10 4.2 TEA5767的主要功能特征…………………………………………………………10 4.3 TEA5767的管脚说明及其基本的外围电路………………………………………11 4.4 TEA5767的应用电路………………………………………………………………12 第五章 系统调试……………………………………………………………………………14
5.1硬件调试……………………………………………………………………………14 5.2软件调试……………………………………………………………………………14
东华理工大学毕业设计(论文) 目 录
5.3软硬件调试…………………………………………………………………………15 5.4结果分析……………………………………………………………………………15第六章 总结…………………………………………………………………………………16 参考文献 ……………………………………………………………………………………17 附录一……………………………………………………………………………………….18 附录二 ………………………………………………………………………………………19
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