超声成像数据采集系统前端调理电路设计  

Design of Front-end Signal Conditioning Circuit in Ultrasound Imaging Data Acquisition System

作　　者：朱金福[1] 李晖[1] 谢文明[1] 李志芳[1] 唐嘉铭 

机构地区：[1]福建师范大学光电与信息工程学院,医学光电科学与技术教育部重点实验室,福建省光子技术重点实验室,福建福州350007

出　　处：《福建师范大学学报（自然科学版）》2014年第1期52-57,共6页Journal of Fujian Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(61178089;81201124);福建省科技厅重点项目(2011Y0019)

摘　　要：根据超声信号在组织传播衰减速度快,穿透深度与接收回波信号强弱成反比的特性,以及超声成像数据采集系统高增益、增益可变的要求,提出了一种低噪声、宽带宽增益可调前端调理电路方案.系统合理地进行低噪声前置放大,基于AD8331的可变增益放大、滤波等,给出了各个模块的设计详图以及仿真结果,综合设计指标,为超声成像后期数据采集的调理提供了可靠的依据.A low-noise, broadband width, gain-variable fronted-end signal conditioning cir- cuit schematic was proposed according to ultrasound signal attenuation quickly in tissue, the charac- terization of accepted echo signal strength is inversely proportional to depth of penetration, and high gain and gain variable requirement in ultrasound system. The system composes of low-noise ampli- fier, AD8331 variable gain amplifier, filter etc. The design details of each module and simulation result was presented. Provide a reliable basis for the signal processing for the consequence ultra- sound imaging system.

关 键 词：超低噪声放大 可变增益放大 衰减 时间增益补偿 

分 类 号：TN72[电子电信—电路与系统]