A 64-channel ultra-low power bioelectric signal acquisition system for brain-computer interface

Akshay Mahajan; Alireza Karimi Bidhendi; Po T. Wang; Colin M. McCrimmon; Charles Y. Liu; Zoran Nenadic; An H. Do; Payam Heydari

doi:10.1109/BioCAS.2015.7348355

A 64-channel ultra-low power bioelectric signal acquisition system for brain-computer interface

Akshay Mahajan, Alireza Karimi Bidhendi, Po T. Wang, Colin M. McCrimmon, Charles Y. Liu, Zoran Nenadic, An H. Do, Payam Heydari

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

12 Scopus citations

Abstract

A 64-channel bioelectric signal acquisition system incorporating a CMOS ultra-low power amplifier array and serializer integrated circuit (IC) is presented. Each amplifier within the array employs a complementary differential topology with cross-coupled-pair active load to achieve ultra-low power and low-noise operation for a nominal gain of 39 dB. The serializer utilizes zero-power complementary switch network which is controlled by an on-chip synchronous counter-based control circuitry. Fabricated in a 130 nm CMOS process with an area of 5.45 mm2 (excluding pads), the IC is designed to operate in the weak inversion region, resulting in an estimated total power consumption of 14 μW. Each amplifier consumes 216 nW from 0.4 V supply and occupies 0.044 mm2 of die area. The measured input-referred voltage noise across 190 Hz of amplifier's bandwidth is 2.19 μVRMS, corresponding to a power efficiency factor of 11.7. Experiments show that this system effectively amplifies human electroencephalographic and electromyographic signals.

Original language	English (US)
Title of host publication	IEEE Biomedical Circuits and Systems Conference
Subtitle of host publication	Engineering for Healthy Minds and Able Bodies, BioCAS 2015 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781479972333
DOIs	https://doi.org/10.1109/BioCAS.2015.7348355
State	Published - Dec 4 2015
Event	11th IEEE Biomedical Circuits and Systems Conference, BioCAS 2015 - Atlanta, United States Duration: Oct 22 2015 → Oct 24 2015

Publication series

Name	IEEE Biomedical Circuits and Systems Conference: Engineering for Healthy Minds and Able Bodies, BioCAS 2015 - Proceedings

Conference

Conference	11th IEEE Biomedical Circuits and Systems Conference, BioCAS 2015
Country/Territory	United States
City	Atlanta
Period	10/22/15 → 10/24/15

Keywords

brain-computer interface
Electrocorticography (ECoG)
noise efficiency factor (NEF)
operational transconductance amplifier (OTA)
power efficiency factor (PEF)
ultra-low power (ULP)
weak inversion (WI) region

ASJC Scopus subject areas

Biotechnology
Instrumentation
Biomedical Engineering
Electrical and Electronic Engineering

Access to Document

10.1109/BioCAS.2015.7348355

Cite this

Mahajan, A., Bidhendi, A. K., Wang, P. T., McCrimmon, C. M., Liu, C. Y., Nenadic, Z., Do, A. H., & Heydari, P. (2015). A 64-channel ultra-low power bioelectric signal acquisition system for brain-computer interface. In IEEE Biomedical Circuits and Systems Conference: Engineering for Healthy Minds and Able Bodies, BioCAS 2015 - Proceedings Article 7348355 (IEEE Biomedical Circuits and Systems Conference: Engineering for Healthy Minds and Able Bodies, BioCAS 2015 - Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/BioCAS.2015.7348355

A 64-channel ultra-low power bioelectric signal acquisition system for brain-computer interface. / Mahajan, Akshay; Bidhendi, Alireza Karimi; Wang, Po T. et al.
IEEE Biomedical Circuits and Systems Conference: Engineering for Healthy Minds and Able Bodies, BioCAS 2015 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2015. 7348355 (IEEE Biomedical Circuits and Systems Conference: Engineering for Healthy Minds and Able Bodies, BioCAS 2015 - Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Mahajan, A, Bidhendi, AK, Wang, PT, McCrimmon, CM, Liu, CY, Nenadic, Z, Do, AH & Heydari, P 2015, A 64-channel ultra-low power bioelectric signal acquisition system for brain-computer interface. in IEEE Biomedical Circuits and Systems Conference: Engineering for Healthy Minds and Able Bodies, BioCAS 2015 - Proceedings., 7348355, IEEE Biomedical Circuits and Systems Conference: Engineering for Healthy Minds and Able Bodies, BioCAS 2015 - Proceedings, Institute of Electrical and Electronics Engineers Inc., 11th IEEE Biomedical Circuits and Systems Conference, BioCAS 2015, Atlanta, United States, 10/22/15. https://doi.org/10.1109/BioCAS.2015.7348355

Mahajan A, Bidhendi AK, Wang PT, McCrimmon CM, Liu CY, Nenadic Z et al. A 64-channel ultra-low power bioelectric signal acquisition system for brain-computer interface. In IEEE Biomedical Circuits and Systems Conference: Engineering for Healthy Minds and Able Bodies, BioCAS 2015 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2015. 7348355. (IEEE Biomedical Circuits and Systems Conference: Engineering for Healthy Minds and Able Bodies, BioCAS 2015 - Proceedings). doi: 10.1109/BioCAS.2015.7348355

Mahajan, Akshay ; Bidhendi, Alireza Karimi ; Wang, Po T. et al. / A 64-channel ultra-low power bioelectric signal acquisition system for brain-computer interface. IEEE Biomedical Circuits and Systems Conference: Engineering for Healthy Minds and Able Bodies, BioCAS 2015 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2015. (IEEE Biomedical Circuits and Systems Conference: Engineering for Healthy Minds and Able Bodies, BioCAS 2015 - Proceedings).

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A 64-channel ultra-low power bioelectric signal acquisition system for brain-computer interface

Abstract

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Keywords

ASJC Scopus subject areas

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