@article{Constandinou:2009:10.1109/TBCAS.2009.2027421,
author = {Constandinou, TG and Georgiou, J},
doi = {10.1109/TBCAS.2009.2027421},
journal = {IEEE Transactions on Biomedical Circuits and Systems},
pages = {363--369},
title = {A Micropower Tilt Processing Circuit},
url = {http://dx.doi.org/10.1109/TBCAS.2009.2027421},
volume = {3},
year = {2009}
}

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TY  - JOUR
AB  - This paper describes a novel analogue circuit for extracting the tilt angle from the output of a linear 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 MOS devices operating in weak inversion, 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 circuit has been fabricated in AMS 0.35um  2P4M CMOS technology and this paper presents the theory, implementation and measured results.
AU  - Constandinou,TG
AU  - Georgiou,J
DO  - 10.1109/TBCAS.2009.2027421
EP  - 369
PY  - 2009///
SN  - 1932-4545
SP  - 363
TI  - A Micropower Tilt Processing Circuit
T2  - IEEE Transactions on Biomedical Circuits and Systems
UR  - http://dx.doi.org/10.1109/TBCAS.2009.2027421
UR  - http://hdl.handle.net/10044/1/4287
UR  - http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5299045
VL  - 3
ER  - 

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