A low power QRS detection processor with adaptive scaling of processing resolution

IEICE Electronics Express

Jiahui Luo¹  Zhijian Chen¹  Menghan Jia¹  Taotao Zhu¹  Xiaoyan Xiang²  Jianyi Meng² 

[1] Institute of VLSI Design, Zhejiang University;State Key Laboratory of ASIC and System, Fudan University

关键词: ECG processor;    QRS detection;    resolution scaling;    low power;   

DOI  :  10.1587/elex.14.20170882

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

This work presents a power efficient QRS detection processor with self-adjustable processing resolution. As reducing the resolution of electrocardiogram (ECG) data in certain degree has little effect on the detection accuracy but helps cut down the calculation power, a total of eight processing resolutions are supported in the processor, which can bring different levels of dynamic power reduction. The processing resolution is scaled adaptively based on the QRS detection result to achieve optimized energy efficiency and guarantee acceptable detection performance. The processor is implemented in SMIC 40 nm CMOS technology and has a total area of 5655 um2. When tested on MIT-BIH arrhythmia database with 50 MHz operating frequency and 0.9 V voltage supply, its power consumption is 77.7 uW, which is reduced by 27.4% compared to the original processor, while the area is only increased by 6.7%. And it also achieves relatively high detection result, with an average sensitivity of 98.63% and positive prediction of 98.86%.

【 授权许可】

CC BY