基于单片机的数字FM收音机设计和实现

基于51单片机数字FM收音机设计和实现摘 要 现在大家常使用收音机为手动调频收台，使用较为麻烦，而且因为接收灵敏度不高，所接收频段较窄。TEA5767 含有高性能 RF AGC 电路，其接收灵敏度高、参考频率选择灵活、可实现自动搜台。 本课题实行 STC89C52 单片机和TEA5767 为关键器件，用 I2C 通信方法联接单片机和 TEA5767，实现数字 FM 收音机系统。经过编写软件利用单片机控制 TEA5767 实现手动活自动调频，收到信号经过 TAD2822 功放器件放大后，再用扬声器输出信号。在调频过程中能够经过 LCD1602 液晶显示器来随时查看信号频率。关键词：数字调频； STC89C52； TEA5767； TDA2030ABSTRACTNowadays people usually use the radio for manual FM accept , it is much trouble, and because the rx sensitivity is not high, the frequency band received is very narrow。TEA5767 has high-performance RF AGC circuit, high sensitivity receiving, reference frequency selection flexible and it can be the realization of automatic search platform。So in this designing I will use the STC89C52 single-chip microcomputer and TEA5767 as the core components of digital FM radio system and Use the I2C communication to connect between STC89C52 and TEA5767 chip。Through the software written and using single chip computer control TEA5767 achieve manually live to be automatic FM, received signal through the TAD2030 amplifier amplification device, then use the speaker output the signal。In the process of FM the frequency of the signal can be checked by LCD1602 。Key words：Digital FM； STC89C52； TEA5767； TAD2030目 录绪论................................................................41 基于单片机 FM 收音机工作原理.......................................51.1 FM 收音机基础工作原理........................................51.2 数字调整 FM 收音机工作原理...................................51.3 用单片机完成数字调整 FM 收音机功效设计.......................62 硬件电路设计..................