浅谈LM系列比较器在广播发射台站监测报警装置中的应用  

Discussion on LM Series Comparators in Monitoring Alarm Devices for Broadcasting Transmitting Station

作　　者：李春秋 李昆 王学忠 Li Chunqiu;Li Kun;Wang Xuezhong(Jinzhou Radio and TV Station Transmitting Center,Liaoning 121000,China)

机构地区：[1]锦州广播电视台发射中心,辽宁121000

出　　处：《广播与电视技术》2019年第1期92-95,共4页Radio & TV Broadcast Engineering

摘　　要：本文简述了LM系列电压比较器中常用型号LM339和LM358的工作原理,并详尽讲解了以LM399和LM358为核心元件设计组装的广播发射设备故障报警器。该故障报警装置所能监测的发射设备故障包括发射机异常后出现的输出功率自动降低以及广播信号中断后导致无音频信号输出两类故障。This paper briefly describes the working principles of LM339 and LM358 models commonly used in LM series comparators.It also elaborates on the signal monitoring for radio stations designed with LM399 and LM358 as the core components.This alarm device monitors on output power reduction due to abnormal transmitter power and audio signal output failure caused by broadcasting interruption.

关 键 词：全固态中波发射机 LM系列比较器LM339 LM358 无音频 无载频 

分 类 号：TN931.3[电子电信—信号与信息处理]