0.36 μW/channel capacitively-coupled chopper instrumentation amplifier in EEG recording wearable devices for compressed sensing framework

Mii, Kenji; Kanemoto, Daisuke; Hirose, Tetsuya

Japanese Journal of Applied Physics, 2024, 63(3), 03SP54

Number of Access:476（2025-08-15 09:42 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/97766

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Title
0.36 μW/channel capacitively-coupled chopper instrumentation amplifier in EEG recording wearable devices for compressed sensing framework
Creator
CreatorName
Mii, Kenji
NRID
1000090603332 1000090603332
researchmap permalink
dkanemoto dkanemoto
Scopus Author ID
6504308983 6504308983
ORCID
0009-0002-7564-6351 0009-0002-7564-6351
CreatorName
Kanemoto, Daisuke
NRID
1000070396315 1000070396315
researchmap permalink
hirose_tetsuya hirose_tetsuya
Scopus Author ID
9272478400 9272478400
ORCID
0000-0003-1997-5097 0000-0003-1997-5097
CreatorName
Hirose, Tetsuya
Subject
chopper amplifier
compressed sensing
EEG
low power
Description
Mii K., Kanemoto D., Hirose T.. 0.36 μW/channel capacitively-coupled chopper instrumentation amplifier in EEG recording wearable devices for compressed sensing framework. Japanese Journal of Applied Physics 63, 03SP54 (2024); https://doi.org/10.35848/1347-4065/ad264f.
Abstract
We evaluated the effectiveness of a low-current-consumption amplifier for a compressed-sensing (CS) framework in wearable electroencephalography (EEG) recording devices. The amplifier uses a capacitively coupled chopper instrumentation amplifier (CCIA) architecture which is often used for low-noise amplifier (LNA) to achieve low consumption and low-noise characteristics. According to measurements of the designed CCIA, the power consumption was 0.36 μW/channel, and the input referred noise (IRN) was 4.47 μVrms. The measured IRN and simulations were used to confirm the effect of CCIA noise on the CS-based EEG measurement framework. The difference in the normalized mean squared error at CR = 4 to the uncompressed conditions could be reduced to 0.008. The findings show that even with the LNA specialized for low power consumption, a slight signal degradation is observed when the compression ratio is increased up to 4 in the CS framework by utilizing the sparsity of EEG in the frequency domain.
Publisher
Institute of Physics
Source Title
Japanese Journal of Applied Physics
Volume (Issue)
63(3)
Page
03SP54
Date of Issued
2024-03-01
Language
English
Handle URL
https://hdl.handle.net/11094/97766
PISSN
00214922
eISSN
13474065
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.35848/1347-4065/ad264f
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
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Version of Record
Category
学術雑誌論文 Journal Article