一种用于双感应测井仪的前置放大滤波电路设计  

Design of preamplifier filter circuit for double induction logging

作　　者：王鹏[1] 王敏娟[1] 刘丹[1] 

机构地区：[1]西安石油大学光电油气测井与检测教育部重点实验室,西安710065

出　　处：《电子测试》2013年第2期25-27,共3页Electronic Test

基　　金：国家自然科学基金项目(50974103)资助

摘　　要：在感应测井仪器中,接收线圈接收到的感应信号一般为微伏级的微弱信号,而且叠加着井下众多的干扰信号,这就对前置放大滤波电路的设计提出了很高的要求。本文设计了一种前置放大滤波电路,具有高输入阻抗、良好的频率特性、电路工作点稳定等特点。电路设计中,不仅采用高稳定和低噪声渥尔曼电路作为前置放大电路的输入级,使电路具有很高的输入阻抗的同时又具有良好的频率特性,而且通过选用高精度的器件来减小电路的噪声影响。通过仿真,证明了前置放大滤波电路的性能指标能够达到了设计要求。In induction logging, induction signal is small and punctuated with interfering signal, so the preamplifier filter circuit design puts forward the high requirements. This paper introduces the design of preamplifier filter circuit with high input impedance, good frequency characteristics, and Circuit used stability, ln the circuit design, not only using high stability and low noise wallman circuit as a preamplifier input level, the circuit is of high input impedance at the same time as the good frequency characteristics, but also through the use of high precision of device to reduce the noise influence. The preamplifier filter circuit performance index can meet the design reauirements through out the simulation .

关 键 词：前置放大 感应测井 滤波 

分 类 号：TE927.6[石油与天然气工程—石油机械设备] TN721[电子电信—电路与系统]