多函数波形发生器的设计毕业设计（论文）.docVIP

多函数波形发生器的设计 摘 要 各种各样的信号是通信领域的重要组成部分，其中正弦波、三角波和方波等是较为常见的信号。在科学研究及教学实验中常常需要这几种信号的发生装置。为了实验、研究方便，研制一种使用方便的信号源是十分必要的。本设计介绍了多函数波形发生器的系统设计和工作原理。硬件部分主要由AT89C51单片机、DAC0832数/模转换器、放大器和其他辅助电路组成。系统的原理是单片机通过程序读取数据调出所产生的波形代码，经过DAC0832数/模转换器将单片机输出的数字信号转换成为模拟信号后，再由放大器将信号放大输出在示波器上显示。波形及其参数可由软件设定，程序采用C语言编译，使编译比较简单。系统用比较简单的硬件实现了多函数信号的选择输出和显示功能。具有显示波形清晰，稳定，可靠性高，原理简单，实用性强等优点。所以该设计能广泛用于电子电路、自动控制系统和教学实验等领域。 关键词：函数发生器，AT89C51单片机，DAC0832 The Design Of Multi-function Signal Generator Author: Yin Junwei Tutor: Wang Erping Abstract A variety of signals is an important part of communication. The signals which include sine wave and square wave signals are very common. Devices of signal generation are needed in an experiment of scientific research. It is necessary to develop a user-friendly source in order to improve the convenience of experiment and study. The article introduces the working principle of multi-function signal generator and the design of system. The hardware make up of AT89C51 microcontroller, DAC0832 D/A converters, amplifiers and other auxiliary circuit. The principle of the system is that the microcontroller read the data through the procedure, and then the waveform code converter the digital signal into an analog signal by the DAC0832. We use the software to adjust the data of the waveforms. We have written the code in C language, so it becomes easy to compile it. System with relatively simple hardware implementation of the multi-function signal to select the output and display, include the advantage of a clearly, stability, reliable waveform display with, simply to use, a certain degree of practicality. Therefore, the design can be widely used in electronic circuits, control systems, teaching experiments, and other fields. Key words: Function generator, AT89C51 microcontroller, DAC0832 目 录 1 绪论 1 1.1 课题背景及目的 1 1.2 方案选择 2 2 系统主要硬件设计 3 2.1 硬件系统框图 3 2.2 硬件电路原理图设计 3 2