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arXiv · 1409.8018

An ECG-on-Chip with 535-nW/Channel Integrated Lossless Data Compressor for Wireless Sensors

C. J. Deepu·X. Zhang·W. -S. Liew·D. L. T. Wong·Y. Lian
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Abstract

This paper presents a low-power ECG recording system-on-chip (SoC) with on-chip low-complexity lossless ECG compression for data reduction in wireless/ambulatory ECG sensor devices. The chip uses a linear slope predictor for data compression, and incorporates a novel low-complexity dynamic coding-packaging scheme to frame the prediction error into fixed-length 16-bit format. The proposed technique achieves an average compression ratio of 2.25x on MIT/BIH ECG database. Implemented in a standard 0.35 um process, the compressor uses 0.565K gates/channel occupying 0.4 mm2 for four channels, and consumes 535 nW/channel at 2.4 V for ECG sampled at 512 Hz. Small size and ultra-low power consumption makes the proposed technique suitable for wearable ECG sensor applications.

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C. J. Deepu, X. Zhang, W. -S. Liew, D. L. T. Wong, Y. Lian. 2014-09-29. An ECG-on-Chip with 535-nW/Channel Integrated Lossless Data Compressor for Wireless Sensors. https://doi.org/10.1109/jssc.2014.2349994

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