NDLI: A miniature pressure system with a capacitive sensor and a passive telemetry link for use in implantable applications

Content Provider	IEEE Xplore Digital Library
Author	Chatzandroulis, S. Tsoukalas, D. Neukomm, P.A.
Copyright Year	1992
Abstract	A miniature telemetric pressure-measuring system is presented in this paper. The system uses passive telemetry to transfer power to the transponder and pressure data to the remote base unit. Such telemetric systems are becoming ever more important in the biomedical field as the interest for in-vivo measurements of different biological parameters both of humans and animals is increasing. A novel capacitive-type pressure sensor based on an SiGeB diaphragm is used as a sensing element. The merits of combining a capacitive pressure sensor and passive telemetry lies in the inherent low-power consumption of the sensor and the continuous availability of power through induction. The pressure sensor is connected to an integrated interface circuit, which includes a capacitance to frequency converter and an internal voltage regulator to suppress supply voltage fluctuations on the transponder side. In addition, the sensor and accompanying interface circuit take up very little space so as to be suitable for implantation.
Sponsorship	IEEE Electron Devices Society American Society of Mechanical Engineering (ASME)
Starting Page	18
Ending Page	23
Page Count	6
File Size	168020
File Format	PDF
ISSN	10577157
Volume Number	9
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Capacitive sensors Telemetry Biosensors Transponders Circuits Biomedical measurements Humans Animals Capacitance Frequency conversion
Content Type	Text
Resource Type	Article
Subject	Mechanical Engineering Electrical and Electronic Engineering

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