低频信号发生器设计大学论文.doc

电气工程学院毕业设计（论文）低频信号发生器设计PAGE\*MERGEFORMAT-54-PAGE\*MERGEFORMAT-53-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AbstractFunctionsignalgeneratorisallsortsoftestandexperimentprocesstheessentialtool,incommunication,measuring,radar,control,teachingfieldsusedwidely.Bothinproductionandscientificresearchorteaching,signalgeneratorareelectronicengineersignalsimulationexperiment,andthebesttool,signalgeneratorsignalgeneratordesigntechnologyisbecomingmoreandmoreadvanced.Researchfunctionsignalgeneratordesignmethods,overcomeshortcomingsoftraditionalmethods,inordertobetterdesignedcomplexFM,attenuationfunctionsignalgenerator.Inthispaper,thefunctionsignalgeneratorICL8038chipwasadoptedtodesignakindofsignalgenerator.Thissignalgeneratormainlyincludestheoveralldesignofthewholesystemstructure,thedesignofhardwareandsoftware.Hardwarecircuitismainlyincludingsignaloutputcircuit,single-chipmicrocomputerminimumsystem,waveformsoutputcircuit,frequencycontrolcircuit,amplitudecontrolcircuitandkeyboardcircuit.Singlechipminimizesystemisresponsibleforusersinteractionandsystemcontrol,keyboardcircuitforselectionofwaveform,frequencyandamplitudecontrol.Thelaststageamplifiercircuitisthesignaltogenerateproperamplifier,inordertoimprovethesignalamplitudeandstrength.Thesoftwaredesignmainlyusedtorealizetheselectionofwaveformtype,changeoffrequencyandamplitude.KeywordsSignalgenerator,ICL8038,changeoffrequency,changeofamplitude目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc357682607"摘要PAGEREF_Toc357682607\hIHYPERLINK\l"_Toc357682608"AbstractPAGEREF_Toc357682608\hIHYPERLINK\l"_Toc357682609"1绪论PAGEREF_Toc357682609\h-1-HYPERLINK\l"_Toc357682610"1.1信号