调频收音机的设计毕业论文.docVIP

调频收音机的设计_毕业论文 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 录 摘 要…………………………………………………………………………………….I ABSTRACT……………………………………………………………………………Ⅱ 1绪论……………………………………………………………………………………1 1.1课题背景……………………………………………………………………….1 1.2课题概论…………………………………………………………………………1 2调频收音机设计………………………………………………………………………2 2.1调频广播与单声道调频收音机的基本组成………………………………………..2 2.1.1调频波的特点……………………………………………………………...2 2.1.2调频广播的优点……………………………………………………………3 2.1.3 单声道调频收音机基本组成及信号流程…………………………………...4 2.2调频头电路………………………………………………………………………4 2.2.1 调频头电路的组成、作用与要求…………………………………………5 2.2.2 输入回路…………………………………………………………………7 2.3高频放大电路……………………………………………………………………7 2.3.1晶体管共基极高放电路…………………………………………………….8 2.3.2场效应管共源极高放电路…………………………………………………9 2.4变频电路………………………………………………………………………11 2.5自动频率控制电路（AFC）…………………………………………………………12 2.6调频头电路实例分析……………………………………………………………13 2.7中频放大电路……………………………………………………………………13 2.7.1作用与性能要求………………………………………………