基于单片机的FM收音机的设计

济南大学泉城学院毕业设计

题目基于单片机的FM收音机的设计学院工学院

专业电气工程及其自动化

班级电气1301

学生李帅先

学号2013040039

指导教师刘韦

二〇一五年四月二十五日

摘要

本设计是一个数字调频收音机（FM），就是接受频率调制的无线电信号，经过解调还原成原信号的电子设备，利用单片机控制有FM功能的专用芯片，设计一个收音机系统。单片机自从20世纪70年代问世以来，以极其高的性能价格比受到人们的重视和关注，所以应用很广，发展很快。单片机的应用改变了控制系统传统的设计思想和方法。以前采用硬件电路实现的大部分控制功能，正在用单片机通过软件方法来实现。这种以软件结合硬件或取代硬件并能提高系统性能的控制技术称为微控制技术。例如，本文所要论述的通过单片机STC89C54来控制TEA5767HN芯片使其实现调频功能。STC89C54单片机的特点是体积小、集成度高、重量轻、抗干扰能力强，对环境要求不高，价格低廉，可靠性高，灵活性好，开发较为容易。现在人们常使用的收音机为手动调频收台，使用较为麻烦，而且由于接收灵敏度不高，所接收的频段较窄。本设计采用的是TEA5767HN芯片，它是由PHILIPS公司推出的针对低电压应用的单芯片数字调谐FM立体声收音机芯片。TEA5767HN芯片内集成了完整的IF频率选择和鉴频系统，只需很少的低成本外围元件，就可实现FM收音机的全部功能。随着信息化的发展，TEA5767系列单片数字收音机也就被广泛应用到数码音响，使用宏晶科技生产的8位微控制器STC89C54来控制数字收音机模块TEA5767，构成一个FM数字收音机系统。本设计主要是体现单片机系统的自动控制能力，更重要的意义是单片机的应用改变了控制系统传统的设计思想和方法。

关键词：

STC89C54单片机；TEA5767HN芯片;

ABSTRACT

The design is a digital FM radio (FM), It is to receive the frequency modulated radio signals, electronic equipment restored to the original signal after demodulation, the use of dedicated chip MCU control FM functions, design a radio system.The singlechip has come out since the 1970s, compared to is valued people's and the attention by the extremely high performance price, therefore the application is very broad, the development is very quick. The application of SCM has changed the design idea and method of the traditional control system. Previously used by most of the hardware circuit of the control function, is the MCU software methods to achieve. With the combination of hardware or software to replace hardware and can improve the control system performance is called the micro control technology. STC89C54 Monolithic integrated circuit's characteristic is the volume is small, the integration rate is high, the weight is light, antijamming ability, is not high to the environment request, the low in price, the reliability is high, the flexibility is good, the development is easier. What this design uses is the TEA5767 chip, it is promotes by PHILIPS Corporation in view of the low voltage application single chip digit harmonious FM stereophonic receiver chip. In the TEA5767 chip integrated the complete IF frequency selection and the frequency discrimination system, only need the very few low cost periphery part, be possible to realize the FM radio's complete function. With the development of information technology, the TEA5767 series monolithic digital radios will be widely applied to digital audio, use the macro crystal technology to produce 8 bit micro controller STC89C54 to control the module of digital radio TEA5767, a FM digital radio system.This design is mainly the automatic control ability of MCU system, more important is the design idea and method of the application of SCM has changed the traditional control system.

Keywords：STC89C52 , Nokia5110 , TEA5767