Development of a Low-Cost and High Signal-to-Noise Ratio Surface Electromyography Sensor Based on AD8420 and AD8607 Amplifiers

The aim of this study is to design and fabricate a low-cost, high signal-to-noise ratio surface EMG signal acquisition device. During the research process, the acquisition requirements and interference sources of sEMG signals were analyzed, a suitable amplifier was selected and the circuit design was improved, and the design was also verified by simulation. The experimental results show that the design proposed in this paper can effectively acquire the EMG signals generated by skeletal muscle movement, can distinguish between muscle contractions of different intensities, and achieves a high signal-to-noise ratio of 26.3 dB.