【正文】 se. In the first chapter introduces the development of radio and background and background of the radio to understand the development process and the application significance of AM FM receiver. The second chapter tells the radio workflow and the working principle of the radio to have a prehensive understanding. Chapter III, on the radio on a specific circuit and parameters are analyzed in detail described the FM head circuit design amplifier circuit, detection circuit and other circuits, and pare the advantages and disadvantages of FM and fourth chapter, describes in the welding device details that need chapter describes after welding is pleted, the adjustment of the radio, so that radio can work paper I use superheterodyne design methods, it has a high sensitivity, stability, low noise, good selectivity and distortion is the relatively large size of the discrete ponents radio , not suitable for the needs of real life now. Keywords: AM FM receiver。 關(guān)鍵詞 ：調(diào)頻調(diào)幅接收機(jī)； 調(diào)頻頭電路； 檢波電路； 中放電路 Abstract Radio has a wide range of roles in modern society, people can enjoy music, rich leisure life, You can also learn about various aspects of information, stocks and news, everything, to make known the world without leaving home to do from discrete ponents to the integrated circuit radio, radio technology has developed quite mature. In this paper, the design is discrete ponents radio. This article describes the design and relevant knowledge of the radio design, we can clearly grasp the signal flow and transformation process in the receiver。本課題采用超外差式收音機(jī)設(shè)計方法，它具有靈敏度高，工作穩(wěn)定，噪聲小，選擇性好以及失真度小等優(yōu)點。第四章中，講述了在焊接器件時所需要注意的問題。第二章中，講述了收音機(jī)的工作流程以及工作原理，對收音機(jī)有一個全面的了解。通過對收音機(jī)的設(shè)計，能清楚的掌握信號在接收機(jī)中的流程和變換過程；通過對收音機(jī)組 成電路的分析，可以了解到調(diào)頻調(diào)幅接收機(jī)內(nèi)部電路的工作原理和參數(shù)設(shè)計以及信號傳輸?shù)膸?；通過對收音機(jī)電路的調(diào)整，可以了解到噪聲的影響。本文主要設(shè)計的是分立元件收音機(jī)。 西 南 交 通 大 學(xué) 本科畢業(yè)設(shè)計 調(diào)頻調(diào)幅接收機(jī)的設(shè)計與實現(xiàn) 二零一五年六月 西南交通大學(xué)本科畢業(yè)設(shè)計 第 II 頁 摘 要 收音機(jī)在現(xiàn)代社會中有著廣泛的作用，人們可以欣賞音樂，豐富業(yè)余生活，還可以了解各方面的信息，股票、新聞應(yīng)有盡有，做到足不出戶盡知天下事。從分立元件收音機(jī)到集成電路收音機(jī)，收音機(jī)的技術(shù)已經(jīng)發(fā)展的相當(dāng)成熟。 本文主要介紹了收音機(jī)的相關(guān)知識和設(shè)計制作。 在第一章中，介紹了收音機(jī)發(fā)展以及背景，了解調(diào)頻調(diào)幅接收機(jī)的發(fā)展過程和應(yīng)用意義。第三章中，就對收音機(jī)具體的電路和參數(shù)進(jìn)行了分析，詳細(xì)的敘述了調(diào)頻頭電路、中放電路、檢波電路等電路的設(shè)計，并且比較了調(diào)頻和調(diào)幅的優(yōu)缺點。第五章中，講述了在焊接完畢之后，對收音機(jī)的調(diào)整， 使收音機(jī)可以正常工作。但是分立元件收音機(jī)體積比較大，不適合現(xiàn)在生活的需求。 by radio circuit analysis, By analyzing the position of the radio circuit, we can understand the working principle and parameter design, and signal transmission AM FM receiver bandwidth internal circuit。 FM head circuit。 the amplifier circuit 目 錄 摘 要 ................................................................................................................................ II ABSTRACT .......................................................................................................................... III 第 1 章 緒 論 .......................................................................................................................1 本論文的背景和意義 ..............................................................................................1 相關(guān)技術(shù)發(fā)展應(yīng)用介紹 ..........................................................................................2 本論文的主要內(nèi)容 ..................................................................................................3 本論文的結(jié)構(gòu)安排 ..................................................................................................3 第 2 章 調(diào)頻調(diào)幅接收機(jī)的設(shè)計 ...........................................................................................5 調(diào)頻調(diào)幅接收機(jī)的原理 ...........................................................................................5 調(diào)幅調(diào)頻廣播的特點 ...............................................................................................7 調(diào)幅波的特點 .................................................................................................7 調(diào)頻波的特點 .................................................................................................7 超外差式收音機(jī) .......................................................................................................9 第 3 章 調(diào)頻調(diào)幅接收機(jī)的電路 .........................................................................................10 調(diào)頻頭電路 .............................................................................................................10 調(diào)頻頭電路的設(shè)計 .......................................................................................10 選頻網(wǎng)絡(luò) ....................................................................................................... 11 變頻電路 .......................................................................................................12 中頻放大器 .............................................................................................................17 檢波電路 .................................................................................................................19 功率放大電路 .........................................................................................................21 調(diào)頻調(diào)幅收音機(jī)總體電路 .....................................................................................24 第 4 章 元器件的選擇與焊接工藝 .....................................................................................26 元器件的選擇 .........................................................................................................26 元器件的焊接 .........................................................................................................28 第 5 章 收音機(jī)的調(diào)試 .........................................................................................................29 結(jié) 論 ...............................................................................................................................32 致 謝 .............................................................................