A Micropower Tilt Processing Circuit

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Title: A Micropower Tilt Processing Circuit
Author(s): Constandinou, T G
Georgiou, J
Item Type: Conference Paper
Abstract: This paper describes a novel analogue circuit for extracting the tilt angle from the output of a standard MEMS accelerometer. The circuit uses the accelerometer signal together with the gravitational acceleration vector to generate the tilt signal. Using a current-mode representation with devices operated in subthreshold, the appropriate trigonometric function has been realised to compute tilt. Furthermore, implementing a long-time constant filter to extract the mean tilt level provides adaptation to the static tilt level. Specifically, this circuit has been designed as part of an implantable vestibular prosthesis to provide inclination signals for bypassing dysfunctional otolith end-organs. The hardware has been implemented in AMS 0.35 mum 2P4M CMOS technology.
Content Version: Published version
Publication Date: 20-Nov-2008
URI: http://hdl.handle.net/10044/1/1470
DOI: https://dx.doi.org/10.1109/BIOCAS.2008.4696908
Publisher: IEEE
Presented At: IEEE Biomedical Circuits and Systems (BioCAS) Conference
Start Page: 197
End Page: 200
Copyright Statement: ©2008 IEEE Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder
Conference Location: Baltimore, USA
Appears in Collections:Institute of Biomedical Engineering

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