频率特性测试仪设计

论文编号:JD738  论文字数:8282,页数:22

摘要
本设计以单片机为核心设计了一种可变频率的方波、正弦波的发生器，并可测量频率、周期和时间间隔的仪器。利用单片机的数学运算和控制功能，结合部分中规模数字电路，实现了一些波形的输出，及对信号的频率、周期、脉冲宽度等的测量，使用单片机使整个系统具有极为灵活的可编程性，能方便地对系统进行功能扩展与改进。

【关键词】 D/A转换、施密特触发器、单片机、桥式整流、LED显示

Design of frequency identity testing device
Abstract
Have originally designed of variable frequency sinusoidal wave generator 、 the frequency of measurements, and the interval between cycles of equipment. Utilize mathematical operation of the one-chip computer and control the function, combine the digital circuit of some scale of China, have realized the producing of variable frequency sinusoidal wave and the measurement of frequency , cycle , width of pulse to the signal ,etc. Use one-chip computer make whole system it has to be extremely flexible programmable, can carry on the function to expand and improve the system conveniently .

  目   录
摘要 i
Abstract ii
1 引言 1
2 技术要求 1
3 设计方案 1
4 系统电路原理 2
4.1 主控部分8051单片机 2
4.2 数模(D/A)转换部分 4
4.3 整形滤波电路 6
4.4 显示器及接口 7
4.4.1 静态显示驱动法： 8
4.4.2 动态的显示驱动法： 8
4.5 稳压电源单元 9
6 频率信号发生器的软件实现 10
7 结束语 12
参考文献 12
附录:程序及原理图 13