隨著科學(xué)技術(shù)的發(fā)展，調(diào)頻收音機(jī)的應(yīng)用十分廣泛，尤其消費(fèi)類占有相當(dāng)?shù)氖袌?chǎng) 。從分離元件組成的收音機(jī)到由集成電路組成的收音機(jī)，調(diào)頻收音機(jī)技術(shù)已達(dá)到十分成熟的地步。從普通的調(diào)幅收音機(jī)到高級(jí)調(diào)頻收音機(jī)，調(diào)頻收音機(jī)以較高的技術(shù)含量和較高的音質(zhì)得到了廣泛的歡迎。

本課題主要研究調(diào)頻收音機(jī)的設(shè)計(jì)全過(guò)程，各部分電路的組成、作用、性能指標(biāo)和工作原理。設(shè)計(jì)方法主要采用了兩塊集成電路TA7335P和FS2204，使電路設(shè)計(jì)變的簡(jiǎn)單。主要的設(shè)計(jì)思路是：由天線、輸入回路、高頻放大電路、混頻電路、本機(jī)振蕩電路、中頻放大電路、鑒頻電路、低頻功率放大電路、揚(yáng)聲器組成。

本課題設(shè)計(jì)成果，基本上滿足要求，性能指標(biāo)符合。本電路缺點(diǎn)的是音質(zhì)噪聲大，電路還有一點(diǎn)失真等等，還需改進(jìn)。

關(guān)鍵詞  調(diào)頻收音機(jī)發(fā)展、調(diào)頻收音機(jī)、調(diào)頻收音機(jī)設(shè)計(jì)

ABSTRACT

Along with the development of science and technology, FM radios are widely used, especially consumer accounts for a sizeable market. Separation of components from the radio component of the integrated circuit components from the radio, FM radio technology has reached a very mature stage. From the ordinary AM radios to senior FM radios, FM radio to a higher technological content and high sound quality has been widely welcomed. 

The main research topics FM radio entire process of design, the circuit of the composition, function, performance and principle. Design methods used two IC TA7335P and FS2204, the circuit design of a simple change. The main design ideas : from antenna input circuit, high-frequency amplifier, mixer circuit, the machine oscillation circuit, IF amplifier, Kam-frequency circuit, low-frequency power amplifier, loudspeakers component. 

Design results of this project, basically meet the requirements with performance indicators. The shortcomings of the circuit noise is the sound quality, there is little distortion circuit, and so on, need to improve. 

Keywords   FM radio, FM radio, FM radio design 

目   錄

摘 要…………………………………………………………………………………….I

ABSTRACT……………………………………………………………………………Ⅱ

1緒論……………………………………………………………………………………1

1.1課題背景……………………………………………………………………….1

1.2課題概論…………………………………………………………………………1

2調(diào)頻收音機(jī)設(shè)計(jì)………………………………………………………………………2

2.1調(diào)頻廣播與單聲道調(diào)頻收音機(jī)的基本組成………………………………………..2

        2.1.1調(diào)頻波的特點(diǎn)……………………………………………………………...2

        2.1.2調(diào)頻廣播的優(yōu)點(diǎn)……………………………………………………………3

        2.1.3 單聲道調(diào)頻收音機(jī)基本組成及信號(hào)流程…………………………………...4

2.2調(diào)頻頭電路………………………………………………………………………4

2.2.1 調(diào)頻頭電路的組成、作用與要求…………………………………………5

2.2.2 輸入回路…………………………………………………………………7

2.3高頻放大電路……………………………………………………………………7

2.3.1晶體管共基極高放電路…………………………………………………….8

2.3.2場(chǎng)效應(yīng)管共源極高放電路…………………………………………………9

2.4變頻電路………………………………………………………………………11

2.5自動(dòng)頻率控制電路（AFC）…………………………………………………………12

2.6調(diào)頻頭電路實(shí)例分析……………………………………………………………13

2.7中頻放大電路……………………………………………………………………13

2.7.1作用與性能要求…………………………………………………………13

2.7.2電路分析…………………………………………………………………14

2.7.3調(diào)諧回路的種類…………………………………………………………16

2.7.4典型實(shí)例分析……………………………………………………………17

2.8 鑒頻電路與去加重電路…………………………………………………………17

2.8.1鑒頻電路…………………………………………………………………17

2.8.2鑒頻的基本方法…………………………………………………………18

2.8.3電路分析…………………………………………………………………20

2.9低頻放大電路……………………………………………………………………20

2.9.1作用、構(gòu)成、性能要求………………………………………………..21

2.9.2電路分析…………………………………………………………………23

2.9.3典型實(shí)例分析………………………………………....................24

2.10整機(jī)電路分析…………………………………………………………………24

2.10.1集成電路調(diào)頻/調(diào)幅收音機(jī)設(shè)計(jì)…………………………………………25

3結(jié)論………………………………………………………………………...................26

參考文獻(xiàn)………………………………………………………………………………27

致謝…………………………………………………………………………………….31