NDLI: A Crystal-Less Temperature-Independent Reconfigurable Transmitter Targeted for High-Temperature Wireless Acoustic Telemetry Applications

Content Provider	IEEE Xplore Digital Library
Author	Lianhong Zhou Annamalai, M. Jeongwook Koh Minkyu Je Libin Yao Chun-Huat Heng
Copyright Year	2004
Abstract	A reconfigurable acoustic telemetry transmitter that employs crystal-less temperature-independent frequency reference has been realized in a 1- μm silicon-on-insulator complementary metal-oxide-semiconductor process. The transmitter can be configured to transmit either a three-channel chirp signal or a six-channel on-off keying (OOK) signal to provide flexibility based on channel characteristics. Different frequencies derived from the crystal-less temperature-independent frequency reference are directly modulated by input data before being combined and sent through a multiple-feedback low-pass filter. The resulting three-channel chirp signal achieves a total data rate of 60 b/s, whereas the six-channel OOK signal achieves a total data rate of 120 b/s. The frequency reference is realized through a frequency-locked loop that employs a resistor-capacitor phase shifter with a resistor temperature coefficient cancellation technique. It achieves a frequency inaccuracy of ±1.94% over the temperature range of 175 °C ~ 275 °C. Consuming 9 mW and occupying 25 mm², this brief is the first reported integrated solution targeted for high-temperature acoustic telemetry in oil-drilling applications with the highest reported data rate.
Sponsorship	IEEE Circuits and Systems Society
Starting Page	542
Ending Page	546
Page Count	5
File Size	624122
File Format	PDF
ISSN	15497747
Volume Number	60
Issue Number	9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Acoustics Frequency modulation Transmitters Telemetry Chirp Demodulation Thermal stability reconfigurable transmitter Acoustic telemetry high temperature on–off keying (OOK)/chirp
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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