BIOSIGNAL ACQUISITION DEVICE - A Novel Topology for Wearable Signal Acquisition Devices

Luca Maggi, Luca Piccini, Sergio Parini, Giuseppe Andreoni, Guido Panfili

2008

Abstract

The here presented work illustrates a novel circuit topology for the conditioning of biomedical signals. The system is composed of an amplification chain and relies on a double feedback path which assures the stability of the system, regardless of the amplification block gain and the order of the low-pass filter settings. During the normal operation, the offset recovery circuit has a linear transfer function, when it detects a saturation of the amplifier, it automatically switches to the fast recovery mode and restores the baseline in few milliseconds. The proposed configuration has been developed in order to make wearable biosignal acquisition devices more robust, simpler and smaller. Thanks to the used AC coupling method, very low high-pass cut-off frequencies, can be achieved even using small valued passive components with advantages in terms of circuit bulkiness. The noise rejection filter between the pre-amplification and the amplification stages eliminates the out-of-band noise before the amplification reducing the possibility of having clipping noise and minimizing the dynamic power consumption. The presented topology is currently used in a prototypal EEG acquisition device in a Brain Computer Interface (BCI) system, and in a commercial polygraph which will be soon certificated for clinical use.

Paper Citation

in Harvard Style

Maggi L., Piccini L., Parini S., Andreoni G. and Panfili G. (2008). BIOSIGNAL ACQUISITION DEVICE - A Novel Topology for Wearable Signal Acquisition Devices . In Proceedings of the First International Conference on Bio-inspired Systems and Signal Processing - Volume 2: BIOSIGNALS, (BIOSTEC 2008) ISBN 978-989-8111-18-0, pages 397-402. DOI: 10.5220/0001059703970402

in Bibtex Style

@conference{biosignals08,
author={Luca Maggi and Luca Piccini and Sergio Parini and Giuseppe Andreoni and Guido Panfili},
title={BIOSIGNAL ACQUISITION DEVICE - A Novel Topology for Wearable Signal Acquisition Devices},
booktitle={Proceedings of the First International Conference on Bio-inspired Systems and Signal Processing - Volume 2: BIOSIGNALS, (BIOSTEC 2008)},
year={2008},
pages={397-402},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001059703970402},
isbn={978-989-8111-18-0},
}

in EndNote Style

TY - CONF
JO - Proceedings of the First International Conference on Bio-inspired Systems and Signal Processing - Volume 2: BIOSIGNALS, (BIOSTEC 2008)
TI - BIOSIGNAL ACQUISITION DEVICE - A Novel Topology for Wearable Signal Acquisition Devices
SN - 978-989-8111-18-0
AU - Maggi L.
AU - Piccini L.
AU - Parini S.
AU - Andreoni G.
AU - Panfili G.
PY - 2008
SP - 397
EP - 402
DO - 10.5220/0001059703970402