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1、摘要摘要摘要摘要摘要隨著人們生活水平的不斷提高和電子科技的飛速發(fā)展,特別是近年來物質(zhì)生活水平的提高,人們相互交往所利用的通信手段也越來越多,人們不斷追求生活方式的多樣化和個(gè)性化;電子科學(xué)的發(fā)展尤其是無線通信的快速發(fā)展給人們工作和生活注入了新的色彩;人們可以隨心所欲地享受無線通信工具所帶來的樂趣。調(diào)頻模擬通信最早的語音通信方式,廣播電臺(tái)就是它的一種形式,這種傳統(tǒng)的通信方式在今天依然有著廣泛的應(yīng)用,并且也向著多樣化和個(gè)性化和微型化的方向發(fā)展;隨著時(shí)代的發(fā)展它的作用也發(fā)生著變化,廣播電臺(tái)雖然現(xiàn)在已經(jīng)不是人們獲取信息的一種主要手段,但是它在很多方面依然發(fā)揮著主要的作用,它
2、已經(jīng)走進(jìn)了我們的生活,在我們小集體范圍內(nèi)如:學(xué)生宿舍、賓館等場(chǎng)所,由于其使用方便、價(jià)格低廉、技術(shù)成熟、可進(jìn)行一對(duì)多的無線廣播等諸多優(yōu)點(diǎn),所以他依然會(huì)發(fā)揮重要作用。不僅如此,隨著人們追求生活個(gè)性化,它在家庭領(lǐng)域也將會(huì)帶給人們很大的樂趣。本設(shè)計(jì)主要是設(shè)計(jì)一個(gè)調(diào)頻發(fā)射機(jī)和接收機(jī)。發(fā)射機(jī)的主要任務(wù)是完成有用的低頻信號(hào)對(duì)高頻載波的調(diào)制,將其變?yōu)樵谀骋恢行念l率上具有一定帶寬、適合通過無線發(fā)射的電磁波。課題重點(diǎn)在于能給發(fā)射機(jī)電路提供穩(wěn)定頻率的振蕩調(diào)制電路。關(guān)鍵詞:調(diào)頻無線發(fā)射機(jī);頻率可變;音頻放大;FM調(diào)制;功率放大AbstractAspeoplelivingstandardr
3、iseceaselesslyandtherapiddevelopmentofelectronictechnology,especiallyinrecentyears,materialstandardoflivingrise,peopleinteractusemeansofcommunicationmoreandmore,peopleareconstantlypursuelifestylediversificationandpersonalized;Electronicsciencedevelopment,especiallytherapiddevelopmento
4、fwirelesscommunicationforpeopletoworkandlifeinjectednewcolour;Peoplecanenjoyfollowone'sinclinationslywirelesscommunicationtoolsbroughtaboutbythefun.FManalogcommunicationsearliestvoicecommunicationmode,radio,isitakindofform,thiskindoftraditionalcommunicationmodeintodaystillhasawiderang
5、eofapplications,andalsotowardsdiversificationandindividualizedandminiaturizationdirection;WiththedevelopmentofTheTimesitsactionalsochanged,radio,althoughitisnotpeoplegaininformationamaininstrumentinalotofways,butitstillplaysamajorrole,ithavealreadywalkedintoourlife,inourlittlecollecti
6、vescopesuchas:studentdormitory,hotels,becauseitseasytouse,inexpensive,maturetechnology,canundertakeanumberofwirelessradio,andmanyotheradvantages,sohewillstillplayanimportantrole.Notonlysuch,aspeoplepursuepersonalized,ithasmadeinfamilylifefieldwillalsobringpeoplealotoffun.Thisisdesigne
7、dtodesignaFMtransmitterandreceiver.Thetransmitteristhemaintaskofthelowfrequencysignaltocompleteusefulfrequencycarriermodulation,turnitintoacenterinfrequencyincertainbandwidth,fitthroughwirelesstransmittingelectromagneticwave.Subjecttokeyinthetransmittercircuitsprovidestablefrequencyos
8、cilla