Title :
Notice of Retraction
The Design of Cased Hole Formation Resistivity Logging of Preamplifier Circuits
Author :
Jiatian Zhang ; Feifei Huo ; Zhengguo Yan
Author_Institution :
Key Lab. of Photoelectricity Gas & Oil Logging & Detecting Minist. of Educ., Xi´an Shiyou Univ., Xi´an, China
Abstract :
Notice of Retraction
After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.
We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.
The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.
In view of the signals of the cased hole formation resistivity logging which is extremely low, the voltage is nanometer. The amplifier technology is the key of logging technology of formation resistivity through casing. In this paper, which contains the design of signal conditioning circuits, the pre-amplifier utilizes the method of reducing power supply noise and select the low-noise amplifier. In order to achieve the performance and requirements of the circuit, the pre-amplifier make use of virtual GND and some of the denoising ways such as multi-level filtering respectively.
Keywords :
analogue-digital conversion; electrical resistivity; low noise amplifiers; preamplifiers; signal processing equipment; amplifier technology; cased hole formation resistivity logging design; low-noise amplifier; multilevel filtering; nanometer voltage; power supply noise; preamplifier circuits; signal conditioning circuits design; Conductivity; Cutoff frequency; Low pass filters; Noise; Preamplifiers; Transfer functions; extremely weak signal; multi-level filter; preamplifier circuit;
Conference_Titel :
Information Technology and Computer Science (ITCS), 2010 Second International Conference on
Conference_Location :
Kiev
Print_ISBN :
978-1-4244-7293-2
DOI :
10.1109/ITCS.2010.117
