ALC crystal oscillators based pressure and temperature measurement integrated circuit for high temperature oil well applications

• Published in: IEEE transactions on ultrasonics, ferroelectrics, and frequency control Vol. 47; no. 5; pp. 1241 - 1245
• Main Authors: Bianchi, N.A., Karam, J.-M.M., Courtois, B.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.09.2000; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Application specific integrated circuits; Applied sciences; Automatic control; Automatic logic units; Circuit properties; Circuit testing; Circuits; Crystal oscillators; Design. Technologies. Operation analysis. Testing; Electric, optical and optoelectronic circuits; Electronic circuits; Electronics; Engineering Sciences; Exact sciences and technology; Filtering; Integrated circuit measurements; Integrated circuits; Measurements common to several branches of physics and astronomy; Metrology, measurements and laboratory procedures; Micro and nanotechnologies; Microelectronics; Oil wells; Oscillators; Oscillators, pulse generators, and function generators; Oscillators, resonators, synthetizers; Petroleum; Physics; Pressure measurement; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Temperature measurement; Temperature sensors; Time and frequency; High performance; Filtering; Mechanical drive; Resonant circuit; Interface circuit; Experimental study; Oil well; Crystalline material; Temperature measurement; Oscillator; BiCMOS integrated circuits; Pressure measurement; Measurement method; Custom circuit; Multilevel system; high-temperature-oil-well; automatic-level-control; BiCMOS-application-specific-integrated-circuit; ALC-crystal-oscillator; temperature-measurement; pressure-measurement; 220-C
• ISSN: 0885-3010; 1525-8955
• DOI: 10.1109/58.869071

An application specific integrated circuit for the pressure and temperature measurement at the high temperature oil well bottom conditions is presented in this paper. The circuit is mainly composed of three high performance automatic level controlled (ALC) oscillator circuits, which drive three external crystals (the sensitive elements), as well as mixing and filtering stages. The integrated circuit was successfully tested up to 220/spl deg/C, showing a frequency resolution of 0.0003 ppm (0.0007 psi, for the pressure measurement) and a drift of 1.5 Hz/month (0.5 psi/month) concerning, respectively, the short- and long-term measurement stability. A drastic reduction of the whole measurement tool size and cost was then allowed by means of this application specific BiCMOS integrated circuit.