乘法器与乘法型DAC在核仪器程控增益放大器中的设计  

Designed Programmed Gain Control Amplifiers Used in Nuclear Instruments by Multiplier and Multiplying DAC

作　　者：曾国强[1] 倪师军[1] 葛良全[1] 

机构地区：[1]成都理工大学核技术与自动化工程学院,四川610051

出　　处：《核电子学与探测技术》2010年第6期861-864,共4页Nuclear Electronics & Detection Technology

摘　　要：设计了三种适用于数字能谱仪前端电路的程控增益放大器。AD734组成的高速程控增益放大器不仅可实现±60 db增益范围的调节,0.002 db增益步进,还可以消除核脉冲信号的直流漂移。TLC7528级联DAC与AD5453超小体积DAC构成的程控增益放大器可实现低成本,小体积的应用,且分辨率大于等于14位,可应用于核仪器的谱线漂移精密大范围调节。Introduced three kinds of programmed gain controlled amplifier circuit that could work on digital spectroscopy. High speed programmed gain amplifier formed by AD734 could adjust gain between ±60 db, have minimized gain step of 0. 002 db, Furthermore it could eliminate DC offset of nuclear pulse signal. The amplifier formed by TLC7528 series DAC and small area AD5453 DAG may used in the application of low cost, tiny volumes. It have 14 bit resolution and could adjust spectra drift finely in large range.

关 键 词：程控增益放大器 高速乘法器 乘法型DAC 数字能谱 

分 类 号：TH821[机械工程—仪器科学与技术]