低频信号发生器设计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I电气工程学院毕业设计（论文）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,changeofamplitudeII低频信号发生器设计目录摘要.................................................................................................................................IAbstract...........................................................................................................................I1绪论.......................................................................................................................-1-1.1信号发生器概述..........................................................................................-1-1.2信号发生器的发展状况..............................................................................-1-1.3本文的主要工作..........................................................................................-3-2信号发生器的总体方案设计................................................................................-4-2.1信号发生器的总体方案............................................................................-4-2.1.1信号发生部分........................................................................................-4-2.1.2信号幅值控制部分................................................................................-4-2.1.3信号频率控制部分...............
