5LA—36GT型延长放大器电调谐网路的原理分析  

Principle Analysis of Electrical Turning Network Circuit of the Model 5LA - 36GT Subline Amplifier

作　　者：张一平[1] 林娟 苏伟 

机构地区：[1]济南市广播电视局信息网络中心,济南250014

出　　处：《山东电子》2001年第2期22-23,共2页Shandong Electronics

摘　　要：有线电视全电视信号经过两级放大：前放和后放。前放输出的信号增益较高，高低端电平相差较大，应进行衰减和均衡，使后放的输入信号达到要求。本文介绍延长放大器中的电子衰减和电子均衡的电路原理和工作原理。此电路是现今有线电视放大器中应用最广泛的电路。CATV all frequency channel signals has been amplified through two grades: the Post-am- plifier.The Gain of output signals of the Pre-amplifier is rather high, the Level Difference the highest frequency and the lowest frequency is larger, attenuation and equalization must be done.So that input signals of the post-amplifier attains its require- ment.This paper introduces the Circuital Principium and the Operating Principium of the Electrical Attenuator and the Electrical Equalizer in the Subline Amplifier. This circuit is the most wide-used circuit in the nowavailable CATV Amplifiers.

关 键 词：延长放大器 有线电视 电视信号 电调谐网路 

分 类 号：TN948[电子电信—信号与信息处理]