数字荧光示波器1.2GHz带宽前置放大器设计  

Design of DPO＇ s Analog Amplifier with Bandwidth of 1.2GHz

作　　者：张红光[1] 李正明[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《现代科学仪器》2014年第2期58-60,共3页Modern Scientific Instruments

摘　　要：本文介绍了数字荧光示波器1.2GHz带宽前置放大器的设计方法。首先介绍了系统的总体设计,然后给出了各个模块的设计,主要包括无源衰减网络的设计、阻抗变换网络的设计以及数控增益放大器的设计这三个部分。经过分析证明,该前置通道放大器实现了示波器基本功能,各项功能均能达到指定要求。与传统前置模拟通道放大器相比,该模拟通道放大器具有更高的带宽、更小的插入损耗等优点。This paper introduces a design method of the DPO＇s analog amplifier with bandwidth of 1.2GHz.Firstly the design of system is introduced,then the module design is giveen,they mainly include three parts of passive attenuation network, impedance transformation network and variable gain amplifier.The analysis research showed that the amplifier has the basic function of the oscilloscope,the functions are able to meet the specified requirements.Compared with the traditional analog amplifier, the analog amplifier has the advantages of higher bandwidth,more small insertion loss.

关 键 词：数字荧光示波器 数控增益放大 模拟通道 

分 类 号：TM935.3[电气工程—电力电子与电力传动]