测井技术2013，Vol.37Issue(2)：183-186,4.
核磁共振测井仪低噪声模拟接收电路设计
Low Noise Analog Receiver Design for NMR Logging Tool
摘要
Abstract
We present a novel low noise analog receiver for nuclear magnetic resonance (NMR) logging tool.The first stage is home-built tool amplifier,and the designed gain is 52 dB.The first stage uses ultra low noise wideband operational amplifier LMH6626 which its optimum source resistance is very close to the antenna impedance to guarantee the optimum noise performance.The noise performance of first stage was analyzed,and the calculated noise figure is 1.45.Test results show that the maximal gain of analog receiver is 112 dB and the frequency bandwidth is from 400 kHz to 1 MHz.The analog receiver has been used for laboratory prototype NMR logging tool successfully and can amplify NMR signal with low noise performance.关键词
核磁共振测井仪/低噪声/模拟接收电路/放大器/噪声性能/电路设计Key words
NMR logging tool/low noise/analog receiver/amplifier/noise performance/circuit design分类
天文与地球科学引用本文复制引用
于慧俊,肖立志,朱万里,李新,S.Anferova,V.Anferov..核磁共振测井仪低噪声模拟接收电路设计[J].测井技术,2013,37(2):183-186,4.基金项目
国家863项目(2007AA06Z230)和科技部国际合作项目(2009DFA61030)联合资助 （2007AA06Z230）
