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Paper Abstract and Keywords
Presentation 2026-01-30 15:05
Comparative Performance Evaluation of Capacitance Multiplier Circuit and Negative Impedance Circuit for Capacitive ECG Measurement under Low-Capacitance Conditions
Iori Kudo, Akinori Ueno (Tokyo Denki Univ.) NLP2025-126 MBE2025-66 NC2025-88
Abstract (in Japanese) (See Japanese page) 
(in English) Capacitive ECG (cECG) is a technique for acquiring cardiac signals using capacitive coupling formed through clothing between electrodes and skin. Previous studies have reported the measurement of heartbeats (QRS complexes) through clothing with up to 1.8 mm using a negative impedance circuit (NIC). In this study, a capacitance multiplier circuit (CMC) was introduced to enable measurements under lower coupling capacitance conditions. An equivalent circuit simulating clothing was constructed using commercially available circuit components, and the detection performance of the CMC and the NIC was compared and evaluated under identical measurement conditions. Accordingly, CMC enabled reliable detection under lower capacitance conditions than NIC, and successful QRS complex detection through 2.9 mm-thick clothing was confirmed in human participants.
Keyword (in Japanese) (See Japanese page) 
(in English) cECG / capacitance multiplier circuit / negative impedance circuit / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 345, MBE2025-66, pp. 198-203, Jan. 2026.
Paper # MBE2025-66 
Date of Issue 2026-01-21 (NLP, MBE, NC) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF NLP2025-126 MBE2025-66 NC2025-88

Conference Information
Committee NC MBE NLP IEE-MBE  
Conference Date 2026-01-28 - 2026-01-30 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyushu Institute of Technology, Wakamatsu Campus 
Topics (in Japanese) (See Japanese page) 
Topics (in English) NC, NLP, ME, etc. 
Paper Information
Registration To MBE 
Conference Code 2026-01-NC-MBE-NLP-MBE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Comparative Performance Evaluation of Capacitance Multiplier Circuit and Negative Impedance Circuit for Capacitive ECG Measurement under Low-Capacitance Conditions 
Sub Title (in English)  
Keyword(1) cECG  
Keyword(2) capacitance multiplier circuit  
Keyword(3) negative impedance circuit  
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1st Author's Name Iori Kudo  
1st Author's Affiliation Tokyo Denki University (Tokyo Denki Univ.)
2nd Author's Name Akinori Ueno  
2nd Author's Affiliation Tokyo Denki University (Tokyo Denki Univ.)
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Speaker Author-1 
Date Time 2026-01-30 15:05:00 
Presentation Time 25 minutes 
Registration for MBE 
Paper # NLP2025-126, MBE2025-66, NC2025-88 
Volume (vol) vol.125 
Number (no) no.344(NLP), no.345(MBE), no.346(NC) 
Page pp.198-203 
#Pages 6 
Date of Issue 2026-01-21 (NLP, MBE, NC) 

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