基于PRO使用TEUS的函数信号发生器的设计初版.doc

摘要 近年来随着计算机在社会领域的渗透,单片机的应用正在不断地走向深入，同时带动传统函数信号发生器日新月异的更新。单片机能产生高精度、快速变换频率、输出波形失真小的优先选用技术。函数信号发生器是各种测试和实验过程中不可缺少的工具，在通信、测量、雷达、控制、教学等领域应用十分广泛。不论是在生产、科研还是教学上，信号发生器都是电子工程师信号仿真实验的最佳工具，而且，信号发生器的设计方法多，设计技术也越来越先进。研究函数信号发生器的设计方法，克服传统方法的缺点，以更好的方法设计出比较复杂的调频、调幅功能的信号发生器。 本论文介绍的是一种用AT89C51单片机构成的波形发生器，可产生方波、三角波、正弦波、锯齿波等多种波形，波形的周期可用程序改变，并可根据需要选择单极性输出或双极性输出，具有线路简单、结构紧凑、性能优越等特点。文章给出了源代码，通过仿真测试，其性能指标达到了设计要求。单片机小系统负责用户的交互和系统控制，键盘用于频率的输入与波形的选择。LED显示当前所选信号的频率调整情况，而末级放大电路则对生成的信号进行适当的放大，以提高信号的振幅和强度。 关键词：单片机，DAC，信号发生器,频率调节,放大电路 Abstract In recent years, with the computer in the social sector penetration and MCU application is continuously,while driving to the deepening traditional function signal generator on new PE updates. SCM can produce high precision, fast transform the frequency, the output waveform distortion of preferred selection technology. Function signal generator is all sorts of test and experiment process the essential tool, in communication, measuring, radar, control, teaching fields used widely. Both in production and scientific research or teaching, signal generator are electronic engineer signal simulation experiment, and the best tool, signal generator design method, design technology is becoming more and more advanced. Research function signal generator design methods, overcome shortcomings of traditional methods, in order to better designed complex FM, attenuation function signal generator. This thesis introduces a AT89C1 single-chip computers.the waveform generator, can produce square-wave, triangle wave, sine wave, sawtooth wave etc. Various waveform, waveform cycle available program change, and can choose according to need single polarity output or dual polarity output, has the line is simple, compact structure, superior performance characteristics. The article presented the source code, through the simulation test, the performance indexes meet the design requirements. : singlechip processor system is responsible for the user interaction and system contro