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

作者：Liu Xin^*; Zhou Jun; Yang Yongkui; Wang Bo; Lan Jingjing; Wang Chao; Luo Jianwen; Goh Wang Ling; Kim Tony Tae Hyoung; Je Minkyu

来源：IEEE Journal of Solid-State Circuits, 2014, 49(11): 2422-2434.

DOI：10.1109/JSSC.2014.2338870

• Cognitive
• ECG
• multi-functional
• near-threshold
• ultra low power

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 mu m CMOS process, the proposed cognitive ECG processor consumes only 457 nW at 0.5 V for real-time ECG recording and diagnosis.

• 出版日期2014-11
• 单位南阳理工学院