电子信息工程系毕业论文江阴职业技术学院毕业论文课题：信号发生器的设计专题：显示部分专业电子信息工程系学生姓名黄飞飞班级09应电一班学号09030502指导教师包军卫完成日期2011/12/17电子信息工程系毕业论文摘要设计了一种全量程交直流无档幅度显示，该表不仅实现了交流直流的自动换档，而且可完成全量程的自动转换。该表在0～1000V测量范围内都保证了较高精度。该数字电压表由自动量程转换电路、有效值转换电路、A/D转换电路、数码显示部分电路组成。自动量程转换电路由平均值电路将输入的被测电压转换输入到档位判别电路的三路比较器中形成译码电路的控制信号，译码电路在控制电子四选一开关实现自动换档；有效值转换电路采用有效值转换单片集成电路，该芯片可直接计算出任何含有直流和交流成分的复杂输入信号有效值；A/D转换电路用MC14433，该芯片具有自动校零和自动极性转换功能；显示部分电路由MC1413七路达林顿驱动器列阵、CD4511BCD七段锁存-译码-驱动器、能隙基准电源MC1403和共阴极LED发光数码管组成。AbstractDesignafullrangeofACandDCvoltagewithoutfiletable,thetablenotonlytoachievetheACtoDC'sautomatictransmission,andcancompletethefullrangeofautomaticconversion.Thetableinthemeasurementrangeof0~1000Vareguaranteedahighaccuracy.Thedigitalvoltmeterbytheautomaticrangeswitchingcircuit,RMSconversioncircuit,A/Dconvertercircuit,digitaldisplaypartofthecircuitcomponents.Automaticrangeswitchingcircuittotheinputcircuitbytheaverageofthemeasuredvoltageconversioncircuitisinputtothestallsdistinguishtheformationofthree-waycomparatorcontrolsignaldecodingcircuit,decodingcircuitinthecontrolofelectronicfourselectedanautomaticswitchgear;RMSconversioncircuitRMSconvertermonolithicAD536A,thechipcanbedirectlycalculatedwithDCandACcomponentsofanycomplexinputsignalRMS;A/DconvertercircuitwithMC14433,thechiphasautomaticzeroandautomaticpoleofconversion;showspartofthecircuitbytheMC1413sevenLuDalinDaytondrivearray,CD4511BCDsevensegmentlatch-decoder-drive,powersupplyMC1403bandgapreferenceandcommoncathodeLEDlightdigitaltube.目录摘要...............................................................................................................................I-I-电子信息工程系毕业论文Abstract...........................................................................................................................I目录.............................................................................................................................II第一章绪论...................................................................................................................11.1选题背景及意义.....................................................................................................................11.2本课题的研究现状.................................................................................................................11.3选题目的及意义.....................................................................................................................2第二章总体方案...........................................................................................................32.1显示电路分析.........................................................................................................................32.2设计思路.................................................................................................................................32.3设计方案...................................................................................................................
