IEEE SOLID-STATE CIRCUITS MAGAZINE FALL 2022 39 TABLE 1. A COMPARISON OF EEG RECORDING SYSTEMS. CLINICAL SYSTEMS CONSUMER SYSTEMS RECENT RESEARCH [12] [13] SPECIFICATIONS Portability Signal acquisition Number of channels Electrode type Input impedance Input noise A/D sampling rate A/D resolution Data telemetry Connectivity Distance Power System power Battery life BCC: body-channel communication. GEODESIC EEG (EGI) None 32-256 dc coupling Wet ≥1 GΩ <0.8 μVrms 8 kHz 24 b Wired Not applicable Not applicable Not applicable ACTICHAMP PLUS None 16-160 Wet Unknown 2 μVpp (dc-35 Hz) 25-100 kHz 24 b Wired Not applicable Not applicable 7,200 mAh 6 h OPENBCI CYTON Yes 8 dc coupling Dry/wet ≥1 GΩ 2 μVrms (dc-150 Hz) 0.25-16 kHz 24 b BLE 10 m >10 mW User provided MUSE S Yes 4 Dry Unknown Unknown 256 Hz 12 b Bluetooth 10 m >10 mW 10 h NEUROSKY MINDWAVE2 Yes 1 Dry Unknown Unknown 512 Hz 12 b Bluetooth/BLE 10 m >10 mW AAA battery 8 h EMOTIV INSIGHT Yes 5 Semidry Unknown Unknown 128 Hz 16 b BLE 10 m >10 mW 480 mAh 20 h NEUROSPEC DSI-VR300 Yes 7 Dry 47 GΩ 3 μVpp (0.003-150 Hz) 300/600 Hz 16 b BLE 10 m >10 mW 12 h JSSC 2019 [12] Yes 4 (2 left + 2 right) Dry 1 GΩ 0.38 μVrms (0.5-100 Hz) 1 kHz 11 b BCC Determined by relay method 1.5 mW (peak) 40 mAh 10 h ISSCC 2020 [13] Yes Up to 16 Unknown Unknown 0.269 μVrms (0.5-100 Hz) Unknown 10 b BCC Determined by relay method Unknown Unknown