课程设计报告
题目: 高频信号源的设计与制作原理
所属系 电子工程系 专 业 电子信息工程 学 号 01409227 姓 名 丁亚 指导教师 丁文秋
起讫日期 2011.6.25—2011.7.15 设计地点 东南大学成贤学院
东南大学成贤学院课程设计论文
高频信号源的原理与制作
摘要
关键词：高频 频率源 信号合成 课程背景：
随着社会的发展，通讯工具在我们的生活中的作用越来越重要。通信工程专业的发展势头也一定会更好，为了自己将来更好的适应社会的发展，增强自己对知识的理解和对理论知识的把握。
无线电设备中广泛使用各类频率源，通常一个无线电通信系统或网络需要大范围能任意切换的频率点，需要采用频率合成技术来实现。频率合成技术是现代通信对频率源的稳定度、准确度、频谱纯度及频带利用率提出愈来愈高要求的产物。它能够利用一个高稳标准频率源合成出大量具有同样频率标准高性能的离散频率。
单片机在数字时钟中的应用已是非常普遍的，由单片机作为数字钟的核心控制器，可以通过它的时钟信号实现计时功能，将其时间数据经单片机输出，利用显示器显示出来。
本次设计是利用高频合成技术和单片机的计时功能，本文详细阐述了高频信号源的设计过程，涵盖了从需求分析，系统设计，编程，原理图，PCB图以及最后的试验板焊制等基本过程。
I
东南大学成贤学院课程设计论文
Principle and Production of High-frequency Signal Generator
Abstract
In the field of communications, PLL synthesizers playing an increasingly important role. Synthesis is a system, initially the frequency of a series of reference for the entire frequency several times, the reference frequency is usually fixed. This synthesizer called integer N Synthesis. Synthesis technology is constantly advancing, there are a lot of new frequency synthesizer circuit, and in the communications circuits are widely used.
This design is utilizing the SCM to work, among which the SCM AT89C51 is the core element. Meanwhile, LED digitron monitor dynamically to be designed ,invented, watched , texted.
Radio equipment widely used in various frequency source, usually a radio communications system, or network requires a large range of arbitrary switching frequency point, require the use of frequency synthesis technology. Frequency synthesis technology is a modern communications on the frequency stability, accuracy, spectrum utilization for purity and moved more and more demanding products. It can take advantage of a high standard frequency synthesis out of a large number of sources with the same frequency standard high-performance discrete frequency.
SCM in the application of digital clock is already very widespread, the MCU core as a digital clock, you can pass it to the controller of the clock signal timing features, its time data output by the microcontroller, the use of the monitor is displayed.
I
东南大学成贤学院课程设计论文
This design is the use of high frequency synthesis technology and single chip timing functions, this article details the design of high-frequency signal source, ranging from requirements analysis, system design, programming, PCB diagram schematic diagram, as well as the final test of the basic plate welding system. Keywords: frequency synthesis technology for high-frequency signal source SCM
Keywords: phase locked loop (PLL)；PROTEL；PCB CARD；Synthesis
II
东南大学成贤学院课程设计论文
目 录
高频信号源的原理与制作 ........................................................................................................................ I Principle and Production of High-frequency Signal Generator ........................................................................ I Abstract ................................................................................................................................................... I 第一章 课程背景 .............................................................................................................................. 1
1.1 高频信号源 ....................................................................................................................... 1
1.2锁相环 ............................................................................................................................... 2 1.3单片机 ............................................................................................................................... 2 1.4频率合成器 ........................................................................................................................ 5
第二章 课程目的 ................................................................................................................................... 9
2.1树立正确的设计理念 .......................................................................................................... 9 2.2学会项目的设计流程 .......................................................................................................... 9 2.3养成良好的研究习惯 .......................................................................................................... 9 2.3巩固与知新 ......................................................................................................................... 9
第三章 课程任务 ..................................................................................................................................10
3.1 基本元器件认识 ...............................................................................................................10
3.2 高频信号源的制作............................................................................................................10
第四章 课程介绍 .................................................................................................................................. 11
4.1PLL频率合成 ..................................................................................................................... 11
4.1．1 LC正弦振荡器电路 ................................................................................................12 4.1．2环路滤波器 ............................................................................................................13 4.1．3锁相频率合成器 .....................................................................................................15 4.2频率设置及显示电路 .........................................................................................................16 4.3输出电路 ..........................................................................................................................17 4.4电源部分 ..........................................................................................................................19
第五章 调试总结 ..................................................................................................................................19
5.1调试电路 ..........................................................................................................................19
5.1．1压控振荡器电路的调试 ...........................................................................................19 5.1. 2分频方波信号的观察 ..............................................................................................20 5.1. 3场效应管静态工作电压调试 ....................................................................................20 5.1. 4输出波形及显示电路调试 .......................................................................................20 5.2实验总结 ...........................................................................................................................21
5.2. 1设计步骤 ................................................................................................................21 5.2. 2布局原则 ................................................................................................................21 5.2. 3焊接问题 ................................................................................................................22
5.2. 4调试问题 ................................................................................................................22
第六章 PROTEL 99SE 介绍 ....................................................................................................................22
6.1 PROTEL99SE的运行环境....................................................................... 错误！未定义书签。 6.2电路工程设计部分 ............................................................................... 错误！未定义书签。
6.3电路仿真与PLD部分 ............................................................................ 错误！未定义书签。
第七章 心得体会.................................................................................................................................22 附录......................................................................................................................... 错误！未定义书签。
原理图 ......................................................................................................... 错误！未定义书签。
I