16-Channel High-CMRR Neural-Recording Amplifiers Using Common-Made-Tracking Power Supply Rails

Doojin Jang; Taeju Lee; Hyuntak Jeon; Seoktae Koh; Jaesuk Choi; Junghyup Lee; Minkyu Je

doi:10.1109/RFIT.2018.8524035

16-Channel High-CMRR Neural-Recording Amplifiers Using Common-Made-Tracking Power Supply Rails

Doojin Jang, Taeju Lee, Hyuntak Jeon, Seoktae Koh, Jaesuk Choi, Junghyup Lee, Minkyu Je

Department of Electrical Engineering and Computer Science

Korea Advanced Institute of Science and Technology

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

Abstract

This paper presents a neural recording amplifier that operates in environments where large common-mode signals interfere. The proposed scheme employs two types of LDOs that generate isolated supply voltages and a buffer to sense a common-mode signal. Thanks to the isolated supply rails, both the intrinsic common-mode rejection ratio (ICMRR) and common-mode input impedance of the low-noise amplifier (LNA) are increased, which leads to the total common-mode rejection ratio (TCMRR) above 89.2 dB up to 1 kHz even in 16-channel recording with a shared reference electrode. Compared to the conventional method, the TCMRR is improved by 48.7 dB even for 28% mismatch of the electrode-tissue impedance (ETI) and 1% mismatch of the LNA input capacitances.

Original language	English
Title of host publication	2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781538659717
DOIs	https://doi.org/10.1109/RFIT.2018.8524035
State	Published - 5 Nov 2018
Event	2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018 - Melbourne, Australia Duration: 15 Aug 2018 → 17 Aug 2018

Publication series

Name	2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018

Conference

Conference	2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018
Country/Territory	Australia
City	Melbourne
Period	15/08/18 → 17/08/18

Bibliographical note

Publisher Copyright:
© 2018 IEEE.

Keywords

Neural recording amplifier
common-mode rejection ratio (CMRR)
common-mode sensing
isolated supply rails
low-noise amplifier (LNA)

Access to Document

10.1109/RFIT.2018.8524035

Cite this

Jang, D., Lee, T., Jeon, H., Koh, S., Choi, J., Lee, J., & Je, M. (2018). 16-Channel High-CMRR Neural-Recording Amplifiers Using Common-Made-Tracking Power Supply Rails. In 2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018 Article 8524035 (2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/RFIT.2018.8524035

Jang, Doojin ; Lee, Taeju ; Jeon, Hyuntak et al. / 16-Channel High-CMRR Neural-Recording Amplifiers Using Common-Made-Tracking Power Supply Rails. 2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018. Institute of Electrical and Electronics Engineers Inc., 2018. (2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018).

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title = "16-Channel High-CMRR Neural-Recording Amplifiers Using Common-Made-Tracking Power Supply Rails",

abstract = "This paper presents a neural recording amplifier that operates in environments where large common-mode signals interfere. The proposed scheme employs two types of LDOs that generate isolated supply voltages and a buffer to sense a common-mode signal. Thanks to the isolated supply rails, both the intrinsic common-mode rejection ratio (ICMRR) and common-mode input impedance of the low-noise amplifier (LNA) are increased, which leads to the total common-mode rejection ratio (TCMRR) above 89.2 dB up to 1 kHz even in 16-channel recording with a shared reference electrode. Compared to the conventional method, the TCMRR is improved by 48.7 dB even for 28% mismatch of the electrode-tissue impedance (ETI) and 1% mismatch of the LNA input capacitances.",

keywords = "Neural recording amplifier, common-mode rejection ratio (CMRR), common-mode sensing, isolated supply rails, low-noise amplifier (LNA)",

author = "Doojin Jang and Taeju Lee and Hyuntak Jeon and Seoktae Koh and Jaesuk Choi and Junghyup Lee and Minkyu Je",

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year = "2018",

month = nov,

day = "5",

doi = "10.1109/RFIT.2018.8524035",

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Jang, D, Lee, T, Jeon, H, Koh, S, Choi, J, Lee, J & Je, M 2018, 16-Channel High-CMRR Neural-Recording Amplifiers Using Common-Made-Tracking Power Supply Rails. in 2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018., 8524035, 2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018, Institute of Electrical and Electronics Engineers Inc., 2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018, Melbourne, Australia, 15/08/18. https://doi.org/10.1109/RFIT.2018.8524035

16-Channel High-CMRR Neural-Recording Amplifiers Using Common-Made-Tracking Power Supply Rails. / Jang, Doojin; Lee, Taeju; Jeon, Hyuntak et al.
2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018. Institute of Electrical and Electronics Engineers Inc., 2018. 8524035 (2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018).

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

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AU - Choi, Jaesuk

AU - Lee, Junghyup

AU - Je, Minkyu

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N2 - This paper presents a neural recording amplifier that operates in environments where large common-mode signals interfere. The proposed scheme employs two types of LDOs that generate isolated supply voltages and a buffer to sense a common-mode signal. Thanks to the isolated supply rails, both the intrinsic common-mode rejection ratio (ICMRR) and common-mode input impedance of the low-noise amplifier (LNA) are increased, which leads to the total common-mode rejection ratio (TCMRR) above 89.2 dB up to 1 kHz even in 16-channel recording with a shared reference electrode. Compared to the conventional method, the TCMRR is improved by 48.7 dB even for 28% mismatch of the electrode-tissue impedance (ETI) and 1% mismatch of the LNA input capacitances.

AB - This paper presents a neural recording amplifier that operates in environments where large common-mode signals interfere. The proposed scheme employs two types of LDOs that generate isolated supply voltages and a buffer to sense a common-mode signal. Thanks to the isolated supply rails, both the intrinsic common-mode rejection ratio (ICMRR) and common-mode input impedance of the low-noise amplifier (LNA) are increased, which leads to the total common-mode rejection ratio (TCMRR) above 89.2 dB up to 1 kHz even in 16-channel recording with a shared reference electrode. Compared to the conventional method, the TCMRR is improved by 48.7 dB even for 28% mismatch of the electrode-tissue impedance (ETI) and 1% mismatch of the LNA input capacitances.

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Jang D, Lee T, Jeon H, Koh S, Choi J, Lee J et al. 16-Channel High-CMRR Neural-Recording Amplifiers Using Common-Made-Tracking Power Supply Rails. In 2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018. Institute of Electrical and Electronics Engineers Inc. 2018. 8524035. (2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018). doi: 10.1109/RFIT.2018.8524035

16-Channel High-CMRR Neural-Recording Amplifiers Using Common-Made-Tracking Power Supply Rails

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