Key result
The proposed wireless biopotential acquisition system achieved a common-mode rejection ratio of 90 dB and a total power consumption of 66 mW for portable healthcare monitoring.
The proposed wireless biopotential acquisition system demonstrates low power consumption and high common-mode rejection ratio, making it potentially suitable for portable healthcare monitoring of signals like ECG.
Supports portable biopotential device development; leaves open prospective clinical validation before routine use.
A complete biopotential acquisition system with an analogue front-end (AFE) chip is proposed for portable healthcare monitoring. A graphical user interface (GUI) is also implemented to display the extracted biopotential signals in real-time on a computer for patients or in a hospital via the internet for doctors. The AFE circuit defines the quality of the acquired biosignals. Thus, an AFE chip with low power consumption and a high common-mode rejection ratio (CMRR) was implemented in the TSMC 0.18-μm CMOS process. The measurement results show that the proposed AFE, with a core area of 0.1 mm(2), has a CMRR of 90 dB, and power consumption of 21.6 μW. Biopotential signals of electroencephalogram (EEG), electrocardiogram (ECG) and electromyogram (EMG) were measured to verify the proposed system. The board size of the proposed system is 6 cm × 2.5 cm and the weight is 30 g. The total power consumption of the proposed system is 66 mW.
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Wang et al. (2011) studied this question. Wireless biopotential acquisition system with AFE chip was evaluated on Common-mode rejection ratio (CMRR) and power consumption. The proposed wireless biopotential acquisition system achieved a common-mode rejection ratio of 90 dB and a total power consumption of 66 mW for portable healthcare monitoring.
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