Low-Cost Prototype Design of Biomedical Sensing Device for ECG and EMG Signal Acquisition System

This short paper briefly shows a prototype Acquisition System Design (ASD) for Biomedical Sensing Device (BSD). This BSD is designed for detecting both of electrocardiogram (ECG) and electromyogram (EMG). To reduce the hardware cost, a view of ASD is discussed and then a system specification is carefully determined for block function sharing scheme, i.e., the gain of instrumentation amplifier, band-stop and band-pass filters, adjustable gain-stage amplifier, and microcontroller. The results show that the board size of the proposed BSD was only 5×5 cm
²
and the power consumption was 31.9 mW. A lithium battery (280 mAh) is used to supply 3.7 voltages for this BSD, and can let it work lasted 32.5 hours, ideally. The total cost of the proposed BSD is 39.72 USD.