超外差式收音机的电路仿真  

Circuit Simulation of Superheterodyne Radio

作　　者：冯升同[1] 郭立群[1] 刘东[1] 杨光[1] 吴波[1] FENG Sheng-tong GUO Li-qun LIU Dong YANG Guang WU Bo(Engineering College, Beijing Institute of Petro-chemical technology, Beijing 102617, China)

机构地区：[1]北京石油化工学院工程师学院,北京102617

出　　处：《电气电子教学学报》2016年第6期138-141,145,共5页Journal of Electrical and Electronic Education

基　　金：北京市教委面上项目(KM201410017008);北京市大学生科学研究训练项目(2016J00022)

摘　　要：为了提高超外差式收音机原理的教学效果,把Multisim引入课堂。首先,利用Multisim创建了振荡线圈和中周模型。在此基础上,再将收音机的工作过程进行完整地仿真,着重分析了本机振荡、变频以及经过三级中周选频放大后的信号。教学实践表明,这一措施有助于学生理解收音机基本原理,提高了学习兴趣,并对收音机的检测和维修有很好地指导作用。In order to improve the teaching effect about the principle of superheterodyne radio, Multisim simulation is introduced into the teaching classroom. Firstly, an oscillator coil and three intermediate frequency transformer models are created by Muhisim simulation. On this basis the simulation about the working process of the superhete-rodyne radio is implemented. Signal analysis is focused on local oscillation, frequency conversion and 3-stage intermediate-frequency amplification. Teaching practice shows that the measure helps students understand the basic principles of the radio and improve students＇ learning interest, and also can provide guidance for testing and servicing of the radio.

关 键 词：超外差式收音机 MULTISIM仿真 变频 中频变压器 

分 类 号：TN722.34[电子电信—电路与系统]