本科毕设论文_低频信号发生器设计.doc

摘要 函数信号发生器是各种测试和实验过程中必不可少的工具，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很多，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。 本文采用函数信号发生器芯片ICL8038设计了一种信号发生器，完成了信号发生器的总体方案设计、硬件电路设计和软件设计。硬件电路主要包括信号产生电路、单片机最小系统、频率控制电路、幅值控制电路以及键盘电路。单片机最小系统负责系统控制，键盘电路用于波形的选择、频率的控制和幅值的控制。末级的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。软件部分主要实现输出信号的波形选择，输出信号的频率和幅值的调节。 关键词：信号发生器， ICL8038，频率调节，幅值调节 Abstract 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 signal generator 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. In this paper, the function signal generator ICL8038 chip was adopted to design a kind of signal generator. This signal generator mainly includes the overall design of the whole system structure, the design of hardware and software. Hardware circuit is mainly including signal output circuit, single-chip microcomputer minimum system, waveforms output circuit, frequency control circuit, amplitude control circuit and keyboard circuit. Single chip minimize system is responsible for users interaction and system control, keyboard circuit for selection of waveform, frequency and amplitude control. The last stage amplifier circuit is the signal to generate proper amplifier, in order to improve the signal amplitude and strength. The software design mainly used to realize the selection of waveform type, change of frequency and amplitude. Keywords Signal generator,ICL8038,change of frequency, change of amplitude 目录 摘要 I Abstract I 1 绪论 - 1 - 1.1信号发生器概述 - 1 - 1.2信号发生器的发展状