CATV延长放大器的开关电源工作原理及维修改进  

Principle and Maintenance and Improvement of the Switching Power of the 5LA-36GT Subline Amplifier

作　　者：林娟[1] 张一平 

机构地区：[1]济南市广播电视局信息网络中心,250014

出　　处：《山东电子》2001年第1期38-39,41,共3页Shandong Electronics

摘　　要：为适应延长放大器长期、高温运行的要求，应采用MO SFET场效应管作开关管的开关电源，本文介绍电源电路、脉宽调整、工作原理以及常见故障 的维修和改进，此开关电源在有线电视和其它电子器材上，应用前景很广阔。To adapt the requirement that the Subline Amplifie r operates over a long period of time,We must use the Switching Power,the MOSFET Field Effect Transistor act as switching transistor.This paper introduces the P ower Circuit,Pulse-width adjustment,operating principium as well as maintenanc e and improvement of common trouble.This switching power is widely used in CATV and other electrical instruments.Its perspective use is vast.

关 键 词：有线电视 延长放大器 开关电源 维修 

分 类 号：TN86[电子电信—信息与通信工程]