| 过套管地层电阻率测井信号调理电路设计 |
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| 引用本文： | 张家田,霍菲菲,严正国.过套管地层电阻率测井信号调理电路设计[J].测井技术,2009,33(5):483-486. |
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| 作者姓名： | 张家田 霍菲菲 严正国 |
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| 作者单位： | 西安石油大学光电油气测井与检测教育部重点实验室,陕西,西安,710065 |
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| 基金项目： | 陕西省自然科学基金项目资助 |
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| 摘 要： | 过套管电阻率测井响应信号极其微弱，对前置放大电路的设计要求极高。设计了一种能够放大有用信号，同时抑制噪声的信号调理电路。给出了低噪声电源电路、低噪声前置放大器电路、滤波电路和中间级放大电路的原理及实现方法。通过器件选择和良好的PCB设计降低了噪声的影响。采用了二阶巴特沃斯滤波器电路，使滤波器的截止频率稳定．并具有较高的精度。文验测量表明，该调理电路的整体性能指标达到设计要求。
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| 关 键 词： | 过套管地层电阻率测井 信号凋理电路 低噪声 前置放大电路 滤波器 |
Design of Signal Conditioning Circuits for Cased Hole Formation Resistivity Logging |
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| ZHANG Jia-tian,HUO Fei-fei,YAN Zheng-guo.Design of Signal Conditioning Circuits for Cased Hole Formation Resistivity Logging[J].Well Logging Technology,2009,33(5):483-486. |
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| Authors: | ZHANG Jia-tian HUO Fei-fei YAN Zheng-guo |
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| Affiliation: | ZHANG Jia-tian,HUO Fei-fei,YAN Zheng-guo(Key Laboratory of Photo-electricity Gas , Oil Logging , Detecting,Ministry of Education,Xi'an Shiyou University,Xi'an,Shaanxi 710065,China) |
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| Abstract: | Due to the extremely weak signals in the cased hole formation resistivity logging,the voltage is nanometer.So the pre-amplifier circuit must be designed minutely.Designed is a signal conditioning circuit,which can amplify the wanted signal and limit the noise at the same time.Put forward are the principle and method for realization of low-noise power supply circuit,low-noise pre-amplifier circuit,filter circuit and middle-stage amplifier circuit.The noise is limited by means of electronic parts selection an... |
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| Keywords: | cased hole formation resistivity logging signal conditioning circuit low-noise pre-amplifier circuit filter |
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