- 上一篇：单片机智能加湿器控制系统的设计+电路图+源程序
- 下一篇：AT89C51单片机脉冲频率测量系统的设计+电路图+程序
摘要：本文设计了一个数字立体声调频发射机，通过AT89S52单片机控制频率锁相环，从而实现发射频率在一定范围内灵活可调。本次设计主要应用的是数字控制调频发射器,主要运用C语言对其程序设计，通过对AT89S52单片机的控制和对HB1415F集成模块的处理来形成合适的发射频率，它可以在40MHZ范围区和87.9MHZ-109.9MHZ之间内设置多个发射频率，同时也可设置十几个频道，设置为每0.1MHz为单位进行跳变来调节频率，最后应用keil软件来进行程序编译、调试，然后通过protel99se对其进行仿真。50927
毕业论文关键词：调频发射机 ；89S52单片机；BH1415F；调频调制；锁相环
Design of Digital Frequency Modulation Transmitter Based on SCM
Abstract: In order to satisfy the different user requirements of the emission frequency, this paper designs a digital stereo FM transmitter, through the single-chip AT89S52 control the frequency of PLL, so as to realize the emission frequency in a certain range can be adjusted flexibly. Digital control FM transmitter is the main application of this design, the main use of C language on the program design, through of AT89S52 control and treatment of HB1415F integrated modules to form a proper firing frequency, it can set multiple firing frequency, and can also be arranged several channels, set for each 0.1MHz to jump to adjust the frequency, finally using keil software to compile, debug, and then by Protel99SE carries on the simulation in between the 40MHz area and 87.9MHZ-109.9MHZ.
Key word: FM regualtor; MCU ; Integrated circuit; Frequency modulation; Frequency characteristic
目录
摘要 1
关键词 1
引言 1
1.1课题来源及研究的目的和意义 2
1.2我国的研究情况 2
1.3研究的目标与内容 2
2．方案分析与论证 3
2.1单片机C语言的特点 3
2.2单片机控制方案的选择 4
2.3调频调制发射方案的选择 5
2.4电源方案的选择 5
2.5音频输入方案的选择 5
2.6天线的选择 6
3．系统硬件的设计与实现 6
3.1系统整体概述及功能框图 6
3.2单片机外围电路的设计 6
3.3频率选择模块 8
3.4频率显示模块的设计 8
3.5电源设计 12
3.6音频模块的设计 13
3.7系统总电路图 13
4．系统软件设计及编程 15
4.1 BH1415F的频率控制字及传送格式 15
4.2系统主程序流程图 16
4.3系统子程序流程图 17
5．系统调试与仿真 19
5.1调试所用的基本仪器 19
5.2系统仿真 19
5.3系统调试 20
6．结束语