简易低频信号源系统.doc

简易信号发生器摘要单片机应用十分广泛,具有广泛的使用价值。低频信号发生器作为一种常用的信号源, 广泛应用于电子电路、自动控制和科学研究等领域。它是一种为电子测量和计量工作提供符合严格技术要求的电信号设备,因此是电子测试系统的重要部件,是决定电子测试系统性能的关键设备。本设计要求输出信号的频率较低,因此使用了单片机作为控制器使用单片机作为控制器,用中断查表法完成波形数据的输出,再用 D/A 转换器输出规定的波形信号。方波信号直接由单片机的端口输出。结合功能要求情况,使用 80C51 单片机作为控制器,用 DAC0832 作为 D/A 转换器。功能按键使用单片机的 3个端口。通过软/硬件访真实验表明该电路输出频率有较好的稳定性,而且电路使用的元器件比较常见,价格低廉,电路设计方便。。关键词:控制器 D/A 转换器单片机信号源简易信号发生器课程设计- II- Abstract In this paper the function signal occurrence machine isa kind of mon use signal source, extensively be apply in electronics electric circuit, automatic control and sciences to study etc. realm .It isa kind of to measure and calculate the equipments munication that the work provides to meet the strict technique request for the electronics, so is the important parts of the electronics test system, isa key equipments that decides the electronics test system function .It with show a machine, electric voltage form, frequency to account etc. the instrument is similar is the mon and the most basic, also is to get one of the most extensively applied electronics instruments .This design requests to output the frequency of the signal lower, so used a machine tobea machine of the controller usage tobe the controller, with the exportation that the interruption checks the watch method plete a form data, then use the D/A conversion the machine outputs a form signal .A signal is output by the port ofa machine directly .Combine the function requests the circumstance, using a machine of 80C51 tobe the controller, being the conversion machine of D/A with the function key uses 3 ports ofa machine .Can make the exportation pared good of stability, a machine piece is more familiar, the price is cheap, the electric circuit design convenience. Keywords :A machine of the controller D/A conversion machine signal source 简易信号发生器课程设计- III- 目录摘要.............................................................................................................................................................