Table 1.
Comparison between the recording/stimulation devices used in the in vivo experiments.
| Parameters | Commercial devices | WINeRS-8 system | |||
|---|---|---|---|---|---|
| Type | Headstage (w-32) | Headstage (S2W) | Headstage (WINeRS-8 + MCU) | Headstage (WINeRS-8) | Implant (WINeRS-8) |
| Power Source | Battery | Battery | Battery | Inductive | Inductive |
| Function | Neural Recoding | Electrical Stimulation | Recording + Electrical Stimulation | ||
| # of Channel | 32 | 2 | 32/2 | ||
| Gain | 800 | — | 380–6300 | ||
| Bandwidth (Hz) | 0.8–7 k | — | 20–15k | ||
| Input Impedance | 6.5 MΩ | — | 61 MΩ | ||
| Input referred noise | 5.5 µVrms | — | 3.0 µVrms | ||
| Data Carrier | 3.05 GHz | — | 433 MHz (OOK)/2.3 GHz (BLE) | 433 MHz (OOK)/13.56 MHz (OOK-PPM) | |
| Stimulus Current | — | Up to 1 mA | 60 µA–1.86 mA | ||
| Geometry (cm3) | 2.5 × 1.8 × 1.4 | 2.0 × 1.8 × 1.1 | 1.9 × 1.9 × 3 | 2.3 × 2.3 × 2 | 3 × 1.5 × 0.5 |
| Weight | 4.5 g | 3.6 g | 5.7 g | 3.6 g | 2.8 g |
| Power Cons. | — | — | 35 mW | 18.9 mW | |
| Experimental Arena | — | — | 42 × 24 × 20 cm3 | ||
| Power Carrier | — | — | 13.56 MHz | ||
| Duration of Uninterrupted Experiment | 3.5–4.2 hours | 3–5.5 hours | 5.7 hours | Unlimited | |