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《具有整點(diǎn)報(bào)時(shí)及校時(shí)功能的數(shù)字鐘系統(tǒng)設(shè)計(jì)》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、本科畢業(yè)設(shè)計(jì)論文題目：具有整點(diǎn)報(bào)時(shí)及校時(shí)功能的數(shù)字鐘系統(tǒng)設(shè)計(jì)摘要摘要現(xiàn)代社會(huì)的快節(jié)奏生活讓人們對(duì)時(shí)間觀念越來越重視，對(duì)時(shí)間的精確性要求也越來越高，這就催生了數(shù)字電子時(shí)鐘的飛速發(fā)展。數(shù)字鐘就是采用數(shù)字電路來實(shí)現(xiàn)對(duì)“時(shí)”、“分”、“秒”數(shù)字顯示的計(jì)時(shí)裝置。數(shù)字鐘的精度、穩(wěn)定度都優(yōu)于老式機(jī)械鐘。本次設(shè)計(jì)利用中規(guī)模器件實(shí)現(xiàn)數(shù)字時(shí)鐘系統(tǒng)，由555定時(shí)器構(gòu)成多諧振蕩電路產(chǎn)生振蕩脈沖由計(jì)數(shù)器計(jì)數(shù)再經(jīng)譯碼器譯碼后產(chǎn)生驅(qū)動(dòng)數(shù)碼顯示器的信號(hào)，使數(shù)碼顯示器呈現(xiàn)出“時(shí)”“分”“秒”對(duì)應(yīng)的計(jì)時(shí)數(shù)字；電路還增加了校正電路和整點(diǎn)報(bào)時(shí)電路，對(duì)時(shí)鐘進(jìn)行校
2、時(shí)和校分，使其準(zhǔn)確的工作，在整點(diǎn)的時(shí)候發(fā)出警報(bào)。數(shù)字鐘及擴(kuò)大其應(yīng)用，有著非?，F(xiàn)實(shí)的意義。在此次設(shè)計(jì)中，應(yīng)用Protel99se軟件進(jìn)行相關(guān)電氣原理圖的繪制和PCB的制作，采用了74LS系列的芯片實(shí)現(xiàn)數(shù)字鐘的計(jì)時(shí)、譯碼各部分功能，輔助以必要的電路，實(shí)現(xiàn)高效、準(zhǔn)確、使用簡(jiǎn)便的數(shù)字電子時(shí)鐘系統(tǒng)。本次對(duì)數(shù)字時(shí)鐘的研究，使我對(duì)數(shù)字電子技術(shù)有了更深刻的了解和掌握，更促進(jìn)了我對(duì)理論知識(shí)和實(shí)踐相結(jié)合的認(rèn)識(shí)，為以后在專業(yè)上的發(fā)展奠定了基礎(chǔ)。關(guān)鍵詞:數(shù)字時(shí)鐘，數(shù)字電路，中規(guī)模器件IIIABSTRACTABSTRACTThefastrhyth
3、mofsociallifenowletpeopletakemoreandmoreattentiontotheconceptoftime,theaccuracyoftimerequirementsalsomoreandmorehigh,thishasgivenrisetotherapiddevelopmentofdigitalclock.Digitalclockisadigitalcircuitisusedtorealizethe‘‘hour”‘‘minute”‘‘second”digitaldisplaytimer.Th
4、edigitalclockprecision,stabilityissuperiortotheoldmechanicalclock.ThisdesignusingMSIdevicestoachieveadigitalclocksystem,iscomposedof555timercompositionmultivibratorcircuitoscillationpulseiscountedbythecounteranddecoderproducesdrivingdigitaldisplaysignal,thedigita
5、ldisplayshows"hour","minute","second"correspondingtothedigitaltiming;circuitalsoincreasesthecorrectioncircuitandthewholepointtimekeepingcircuit,theclock,schoolandschool,makeitsaccuratework,whenthewholepointofalerts.Inthedesign,applicationProtel99sesoftwarerelated
6、electricalschematicdrawingandPCBproduction.Usingaseriesof74chipsimplementationofdigitalelectronicclocktiming,decodingfunctionofeachpart,auxiliarytothenecessarycircuit,efficient,accurateandeasytousedigitalelectronicclocksystem.Thestudyofthedigitalclock,soIhaveamor
7、eprofoundunderstandingandgraspofdigitalelectronictechnology,butalsotopromotetheunderstandingIoftheoreticalknowledgeandpracticalcombinationof,laidthefoundationforthefuturedevelopmentoftheprofessional.KEYWORDS:Gigitalclock,Gigitalcircuit,MediumscalecomponentsIIIIVI
8、V目錄目錄摘要IABSTRACTI1緒論11.1課題背景11.2選題的目的和意義11.3主要工作12數(shù)字時(shí)鐘系統(tǒng)的工作原理12.1數(shù)字時(shí)鐘設(shè)計(jì)的基本要求12.2數(shù)字時(shí)鐘的工作原理13數(shù)字時(shí)鐘系統(tǒng)的設(shè)計(jì)13.1振蕩電路的設(shè)計(jì)13.2分頻電路的設(shè)計(jì)13.3時(shí)分秒計(jì)時(shí)電路的設(shè)計(jì)13.4譯碼顯示電路的設(shè)計(jì)13.5校時(shí)校分電路
