本科毕业设计(论文)(2010届)论文题目基于单片机的低频信号发生器Microcontroller-basedlow-frequencysignalgenerator学生姓名：李伟涛学号：100706112二级学院名称：电子信息学院专业：电子科学与技术指导教师：钱晓岚职称：.合作/企业教师：职称：郑重声明我谨在此郑重声明：本人所写的毕业论文《基于单片机的低频信号发生器》均系本人独立完成，没有抄袭行为，凡涉及其他作者的观点和材料，均作了注释，若有不实，后果由本人承担。承诺人（签名）：年月日基于单片机的低频信号发生器摘要:信号发生器是一种常用的信号源，广泛地应用于电子电路、自动控制系统和教学实验等领域。目前使用的信号发生器大部分是函数信号发生器，且特殊波形发生器的价格昂贵。所以本设计使用的是AT89c51单片机构成的发生器，可产生三角波、方波、正弦波等多种特殊波形和任意波形，波形的频率可用程序控制改变。在单片机上加外围器件距阵式键盘，通过键盘控制波形频率的增减以及波形的选择，并用了LCD显示频率大小。在单片机的输出端口接DAC0832进行D/A转换，再通过运放进行波形调整，最后输出波形接在示波器上显示。本设计具有线路简单、结构紧凑、价格低廉、性能优越等关键词：信号发生器；单片机；波形调整MICROCONTROLLER-BASeEDLOW-FREQuUEnNCYSIGNALGENERATORAbstract:Signalgeneratorisacommonsource,widelyusedinthefieldofelectroniccircuits,automaticcontrolsystemandteachingexperiments.Mostofthecurrentsignalgeneratorisafunctionofthesignalgenerator,andthepriceisexpensivespecialwaveformgenerator.Therefore,thisdesignusesasinglechipgeneratorAT89c51constituted,canproduceatriangularwave,Avarietyofspecialandarbitrarywaveformssquarewave,sinewave,thefrequencycanbecontrolledbychangingthewaveform.Addperipheraldevicesonasinglechipmatrixkeyboard,thekeyboardcontrolstoselectwaveformsandwaveformchangesinthefrequency,andthefrequencywiththeLCDdisplaysize.OutputportconnectedtothemicrocontrollerDAC0832D/A-converter,andthenadjustthewaveformbytheopamp,thefinaloutputwaveformontheoscilloscopedisplayconnected.Thisdesignhasasimplecircuit,compact,lowcost,superiorperformance,etc.Keywords:HCCI；waveformadjustmentsignalgenerator目录1绪论...............................................................................................................................................31.1选题背景与意义.........................................................................................................................52国内外研究现状...........................................................................................................................52.1波形发生器历史发展状况..........................................................................................................52.2波形发生器当前现状分析..........................................................................................................52.2.1波形获取.........................................................................................................................52.2.2多时域测量......................................................................................................................62.2.3便携性.............................................................................................................................62.2.4实用性.............................................................................................................................62.3波形发生器趋势预测..................................................................................................................72.3.1数据处理功能..........................
