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A 457 nW Near-Threshold Cognitive Multi-Functional ECG Processor for Long-Term Cardiac Monitoring

Title
A 457 nW Near-Threshold Cognitive Multi-Functional ECG Processor for Long-Term Cardiac Monitoring
Author(s)
Liu, XinZhou, JunYang, YongkuiWang, BoLan, JingjingWang, ChaoLuo, JianwenGoh, Wang LingKim, Tony Tae-HyoungJe, Minkyu
Issued Date
2014-11
Citation
IEEE Journal of Solid-State Circuits, v.49, no.11, pp.2422 - 2434
Type
Article
Author Keywords
CognitiveECGmulti-functionalnearthresholdultra low power
Keywords
WAVELET TRANSFORM
ISSN
0018-9200
Abstract
A low-power multi-functional electrocardiogram (ECG) signal processor is presented in this paper. To enable long-term monitoring, several architecture-level power saving techniques are proposed, including global cognitive clocking, pseudo-downsampling wavelet transform, adaptive storing, and denoising-based run-length compression. An ultra-low-voltage ADC is designed for low-power signal digitization with adaptive clocking. Through these architecture-level techniques, the total power consumption can be significantly reduced by 63% as compared to the conventional design. Several circuit-level design techniques are also developed, including ultra-low-voltage operation and near-threshold level shifting, to further reduce the power consumption by 33%. In addition, a low-complexity cardiac analysis scheme is proposed to realize comprehensive on-chip cardiac analysis. Implemented in 0.18 μm CMOS process, the proposed cognitive ECG processor consumes only 457 nW at 0.5 V for real-time ECG recording and diagnosis. © IEEE.
URI
http://hdl.handle.net/20.500.11750/2639
DOI
10.1109/JSSC.2014.2338870
Publisher
Institute of Electrical and Electronics Engineers Inc.
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Appears in Collections:
Department of Electrical Engineering and Computer Science Information and Communication Engineering Research Center 1. Journal Articles

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