A Wearable 128-Channel Wireless Device for High-Density Surface Electromyography Recording

This paper presents the design, manufacturing and testing of a wearable wireless micro-instrument that provides high-precision recording and WiFi transmission of 128 surface electromyography signals. The device occupies an area of 100x60 mm² and comprises an analogue front end board and a wireless board employing the CC3200 chipset. The instrument benefits from an input-referred noise level of 1.34 µVrms and 24-bit conversion while consuming 280 mA in total at 3.7 V. Testing results confirming both the conditioning and the wireless operation are provided. The device can be connected to a customised 128 channel electrode grid and aims at enabling the collection of information during advanced high-density sEMG experiments.