一种基于电流反馈芯片的电荷灵敏快前放设计  

A Fast Charge Sensitive Preamplifier Based on Current Feedback Operational Amplifier

作　　者：李鑫[1,2] 王伟[2] 朱小娜[2,3] 于得洋[2] 丁宝卫[1] 蔡晓红[2] LI Xin WANG Wei ZHU Xiao - na YU de - yang DING Bao - wei CAI Xiao - hong(Lanzhou Univerlsity,Lanzhou 730000 Institude of Modem Physics,Chinese Acadermy of Sciences, Lanzhou 730000 Northwest Normal Univerisity, Lanzhou 730000)

机构地区：[1]兰州大学,兰州730000 [2]中国科学院近代物理研究所,兰州730000 [3]西北师范大学,兰州730000

出　　处：《核电子学与探测技术》2016年第11期1108-1111,共4页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金(11675232;11405241;U1332206)资助

摘　　要：介绍了一种基于电流反馈运算放大器(CFOA)的快电荷灵敏放大电路。通过一个小电阻的引入避免了CFOA电路直接电容反馈所引起的电路不稳定问题,通过反馈电阻和反馈电容的适当取值降低了噪声。经过测试,其带宽可达200MHz,时间分辨率可达125ps。该前放具有高带宽、高性噪比、高时间分辨率等特点,已成功应用于兰州重离子加速器单粒子效应地面模拟实验TR5终端。A fast charge sensitive preamplifier based on current feedback operational amplifier （CFOA） is introduced in this paper. Instability of the circuit from the direct feedback of CFOA circuit eapaeitively is avoided by means of the introduction of a small resistance. Meanwhile, the noise is reduced by giving appropriate values of the feedback resistance and capacitance/ giving the feedback resistance and capacitance appropriate values.The preamplifier is characterized with high bandwidth, high SNR and temporal resolution, so far, it has been used in ground simulation experiment for single event effect at TR5 terminal, Heavy Ion Research Facility in Lanzhou, successfully.

关 键 词：集成电子学 电流反馈放大器 电荷灵敏快前放 

分 类 号：TL821[核科学技术—核技术及应用]