有线广播的负载匹配  

The Load Matching of Cablecasting

作　　者：李国强[1] 

机构地区：[1]淮南广播电视局,安徽淮南232001

出　　处：《淮南职业技术学院学报》2004年第3期113-115,共3页Journal of Huainan Vocational Technical College

摘　　要：扩音机和扬声器之间匹配关系是有线广播系统能否正常工作的关键 ,定压式和定阻式扩音机输出特性不同 ;应用范围和匹配要求也不同 ,根据电子线路基本匹配原理 ,总结了有线广播匹配的最基本要求和不同系统的具体要求 ;介绍了两种扩音机的输出参数 ,运用简单的计算公式 ,通过实例计算 ,解决了不同形式具体线路匹配。The key whether the wired-radio system can work normally is that whether amplifier and loudspeaker could match to each other. Because the output characteristics of constant-voltage and constant-resistance are different, and the application range and match requiting are different too. According to the basic match principles of the electronics circuit, it summed up the most basic request of wired-radio, and described the concrete requests in different systems. Introducing the output parameter of two kinds of amplifiers,by using calculation formula to calculate simple examples,solved easily the concrete circuit in different forms which matches to each other.

关 键 词：扩音机 定阻式 定压式 线间变压器 

分 类 号：TN932[电子电信—信号与信息处理]