A Wireless Multi-Channel Neural Amplifier for Freely Moving Animals
- Szuts, Tobi A
- Fadeyev, Vitaliy
- Kachiguine, Sergei
- Sher, Alexander
- Grivich, Matthew V
- Agrochão, Margarida
- Hottowy, Pawel
- Dabrowski, Wladyslaw
- Lubenov, Evgueniy V
- Siapas, Athanassios G
- Uchida, Naoshige
- Litke, Alan M
- Meister, Markus
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DOIAbstract
Conventional neural recording systems restrict behavioral experiments to a flat indoor environment compatible with the cable that tethers the subject to recording instruments. To overcome these constraints, we developed a wireless multi-channel system for recording neural signals from rats. The device takes up to 64 voltage signals from implanted electrodes, samples each at 20 kHz, time-division multiplexes them into one signal and transmits that output by radio frequency to a receiver up to 60 m away. The system introduces <4 μV of electrode-referred noise, comparable to wired recording systems, and outperforms existing rodent telemetry systems in channel count, weight and transmission range. This allows effective recording of brain signal...