宽带直流放大器的设计与实现  

作　　者：赵冬梅 宋阳 周波 

机构地区：[1]海军大连舰艇学院基础部,辽宁大连116018

出　　处：《科技创新与应用》2020年第26期76-79,共4页Technology Innovation and Application

摘　　要：为放大模拟视频信号,利用STC12C5A60S2单片机为微控制器,以OPA699、THS3121为放大器的核心,设计实现增益可调的宽带直流放大器。经过测试,该放大器能实现0~40dB范围以5dB为步距的增益可调或连续可调,频带宽度为7.5MHz,能够基本不失真地放大模拟视频信号,具有较高的实用性。In order to amplify the analog video signal, the STC12C5A60S2 single chip microcomputer is used as the microcontroller, and the OPA699 and THS3121 are used as the core of the amplifier to design and realize a broadband DC amplifier with adjustable gain. After testing, the amplifier can achieve gain adjustment or continuous adjustment in the range of 0~40 dB with 5 dB steps, and the bandwidth is 7.5 MHz. Therefore, it can amplify analog video signals without distortion, and has high practicality.

关 键 词：宽带放大器 增益可调 单片机 

分 类 号：TN710[电子电信—电路与系统]