High Temperature Crystal Oscillator for Logging Applications in Geothermal Wells

机译：高温晶体振荡器，用于在地热井中测井应用

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This paper discusses the implementation of a high temperature crystal oscillator for logging applications in geothermal wells. The oscillator is designed to minimize the frequency variation over a wide temperature range from room temperature to 300°C. The circuit is a Pierce crystal oscillator using a JFET transistor, a Gallium Orthophosphate crystal and high temperature resistors and capacitors. A high precision high temperature quartz crystal is also tested in the oscillator for comparison purposes. The circuit with the Gallium Orthophosphate crystal offers superior thermal stability with a frequency variation less than 300 ppm over the 20°C to 300°C temperature range.

机译：本文讨论了高温晶体振荡器的实现，用于在地热井中测井应用。振荡器设计成最小化从室温至300°C的宽温度范围内的频率变化。该电路是使用JFET晶体管的刺穿晶体振荡器，镓正磷酸盐晶体和高温电阻器和电容器。高精度高温石英晶晶晶体也在振荡器中进行测试以进行比较。具有镓正磷酸盐晶体的电路具有优异的热稳定性，频率变化在20℃至300℃的温度范围内小于300ppm。

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《Geothermal Resources Council Annual Meeting》|2003年||共4页
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Jason McFee; Harper Whitehouse; GRC;
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原文格式 PDF
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中图分类 P314.2-53;
关键词
High temperature electronics; unshielded electronics; crystal oscillator; logging tool;

机译：高温电子;非屏蔽电子;晶体振荡器;伐木工具;

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1. Application of synthetic fluid inclusions to simultaneous temperature-pressure logging in high-temperature (sub- to supercritical) geothermal systems [J] . Kotaro Sekine, Greg Bignall, Noriyoshi Tsuchiya Geothermics . 2004,第6期

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2. ALC crystal oscillators based pressure and temperature measurement integrated circuit for high temperature oil well applications [J] . Bianchi N.A., Karam J.-M.M. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control . 2000,第5期

机译：基于ALC晶体振荡器的压力和温度测量集成电路，用于高温油井应用
3. ALC crystal oscillators based pressure and temperature measurementintegrated circuit for high temperature oil well applications [J] . Bianchi N.A., Karam J.-M.M., Courtois B. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control . 2000,第5期

机译：基于ALC晶体振荡器的压力和温度测量集成电路，用于高温油井应用
4. High Temperature Crystal Oscillator for Logging Applications in Geothermal Wells [C] . Jason McFee, Harper Whitehouse, GRC Geothermal Resources Council Annual Meeting . 2003

机译：高温晶体振荡器，用于在地热井中测井应用
5. Low power adaptive circuits: An adaptive log domain filter and a low power temperature insensitive oscillator applied in smart dust radio. [D] . Zhai, Yiming. 2010

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6. Ground Thermal Diffusivity Calculation by Direct Soil Temperature Measurement. Application to very Low Enthalpy Geothermal Energy Systems [O] . José Manuel Andújar Márquez, Miguel Ángel Martínez Bohórquez, Sergio Gómez Melgar 2016

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7. Nuclear logging and geothermal log interpretation: formation temperature sonde evaluation [O] . E.W. Ross, N. Vagelatos, J.M. Dickerson, 1982

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8. Design of a pressure/temperature logging system for geothermal applications [R] . Lysne, P, Henfling, J 1994

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High Temperature Crystal Oscillator for Logging Applications in Geothermal Wells

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