【正文】 ications equipment emerge in endlessly, such as telephone, mobile phone, interphone, etc. A half duplex radio have use wireless call system simple, not affected by work restrictions, call low cost, wide application, etc. It is popularly used in frequency mixing technology, on the basis of using radio munication principle of a kind of munication research. At present, people on the inter research has from MoNiHua into digital.The function of this system is to realize call and call functions. The characteristics of wireless talkback telephone is available for small units for internal use, moreover due to the telephone finished product, thus make make wireless module bees very simple, the cost is low. Talkback telephone calls, realized the internal for People39。［關(guān)鍵詞］對(duì)講機(jī)。希望這項(xiàng)技術(shù)的研究能為人們以后的生活、工作帶來(lái)更大的便利，為人們提供更為舒適、完美的生活方式。對(duì)講電話(huà)實(shí)現(xiàn)了內(nèi)部的通話(huà)，為人們的日常生活帶來(lái)了極大的方便，值得進(jìn)一步推廣，有很好的發(fā)展前景。它是在鑒頻混頻等技術(shù)的基礎(chǔ)上，利用無(wú)線(xiàn)電通信原理研發(fā)的一種通信方式本系統(tǒng)的功能在于實(shí)現(xiàn)呼叫和通話(huà)功能。畢 業(yè) 設(shè) 計(jì)（論文）半 雙 工 調(diào) 頻 無(wú) 線(xiàn) 對(duì) 講 機(jī) 的 設(shè) 計(jì)Half duplex Design of a FM Radio ［摘　要］隨著現(xiàn)在通信技術(shù)的日新月異，各種通信設(shè)備層出不窮如電話(huà)，手機(jī)，對(duì)講機(jī)等。半雙工調(diào)頻無(wú)線(xiàn)對(duì)講機(jī)更是在日常生活中發(fā)揮著重要的作用，半雙工對(duì)講機(jī)系統(tǒng)具有使用簡(jiǎn)單、不受網(wǎng)絡(luò)限制、通話(huà)成本低、適用范圍廣等優(yōu)點(diǎn)。無(wú)線(xiàn)對(duì)講電話(huà)的特點(diǎn)是可供小型單位作內(nèi)部電話(huà)使用，此外由于采用成品無(wú)線(xiàn)模塊,從而使制作變得很簡(jiǎn)單,成本也很低。電子技術(shù)的研究才剛剛開(kāi)始，隨著這項(xiàng)技術(shù)的研究逐漸深入，涉及的研究領(lǐng)域也將更廣。本論文最后對(duì)對(duì)講機(jī)的現(xiàn)狀及發(fā)展前景進(jìn)行分析。半雙工。s Daily life has brought great convenience and deserves further promotion, have very good prospects for development. Electronic technology research is just beginning, as the technology research, involving gradually goes deep research realm will be more widely. Hope this technology research for people later life, work bring greater convenience, to provide people with more fortable and perfect way of life. This paper finally to inter current situation and development prospect were analyzed.Key words: Interphone。 Frequercy modulation目 錄1 引言 .....................................................................................................................................1 半雙工無(wú)線(xiàn)調(diào)頻對(duì)講機(jī)的目的和意義 ......................................................................2 半雙工無(wú)線(xiàn)調(diào)頻對(duì)講機(jī)的應(yīng)用 ...................................................................................3 專(zhuān)業(yè)對(duì)講機(jī) ...........................................................................................................3 民用對(duì)講機(jī) ...........................................................................................................3 商用對(duì)講機(jī) ...........................................................................................................3 業(yè)余對(duì)講機(jī) ...........................................................................................................32 無(wú)線(xiàn)調(diào)頻原理 .....................................................................................................................43 系統(tǒng)總體概述及原理 .........................................................................................................5 工作原理圖 ..................................................................................................................5 工作原理 ......................................................................................................................54 單元模塊設(shè)計(jì) .....................................................................................................................5 混頻 ..............................................................................................................................6 鑒頻 ..............................................................................................................................8 乘積 型鑒頻器 .......................................................................................................9 鎖相鑒頻 .............................................................................................................10 集成選頻放大器 ........................................................................................................11 鎖相環(huán)的構(gòu)成及工作原理 ........................................................................................13 鎖相環(huán)路的基本組成 .........................................................................................13 鎖相環(huán)鎖相原理 .................................................................................................14 集成鎖相環(huán) NE564 的介紹 .................................................................................15 音頻功率放大電路 ....................................................................................................17 單調(diào)諧放大器 .....................................................................................................18 雙調(diào)諧放大器 .....................................................................................................20 低通帶通濾波器 ........................................................................................................20 調(diào)頻 ............................................................................................................................22 變?nèi)荻O管工作原理 .........................................................................................22 .......................................................................................................25 發(fā)射電路組裝 ............................................................................................................25 接收電路組裝 ............................................................................................................25 調(diào)頻系統(tǒng)聯(lián)調(diào) ............................................................................................................251 引言古時(shí)候的通信方式有蜂火臺(tái)、飛鴿傳書(shū)、驛站等等，主要的目地在于傳送軍事情報(bào)，其傳輸煤介主要是利用人力和物力來(lái)達(dá)成。經(jīng)過(guò)人們的發(fā)展，在這兩百年內(nèi)獲得重大進(jìn)步，尤其是配合電子元件的進(jìn)步，使復(fù)雜、便利的通信系統(tǒng)得以實(shí)現(xiàn)，并成為日常生活中不可缺少的東西。例如 1864 年，馬克斯威爾(Maxwell)導(dǎo)出電磁波理論，證明電磁波的存在，而赫茲 1887 年經(jīng)由實(shí)驗(yàn)證明電磁波存在，這些進(jìn)步使得無(wú)線(xiàn)通信變得可能也逐漸成真。由于真空管于 1904 年問(wèn)世，促使阿姆斯壯于1918 年發(fā)明超外差無(wú)線(xiàn)電接收機(jī)，開(kāi)啟無(wú)線(xiàn)電廣闊的應(yīng)用大門(mén)。在 1930 年以后，隨著數(shù)子通信、電腦及人造衛(wèi)星的產(chǎn)生，整體通信技術(shù)也朝向數(shù)子通信方向