Table 3.
Comparison of the proposed instrument with the Warner amplifier and the bioamplifier included in Powerlab 26 T
| Parameters | Warner amplifier | Bioamp in Powerlab 26 T | This work |
|---|---|---|---|
| Number of channels | 1 | 2 | 5 (+ 3) |
| Type of biosignals | EEG, ECG, extracellular spikes | ECG, EMG, EEG | ExG, ECoG, LFP, ERNA, body position and movement, PV ectopic activity (+ amperometric/potentiometric) |
| Supply of the ADC | – | ±10 V | ±2.5 V |
| Voltage gain | 40–80 dB | 54–100 dB | 60 dB |
| Input voltage range | ±1 mV to ±100 mV | ±100 μV to ±20 mV | ±2.3 mV |
| Maximum available bandwidth | DC to 10 kHz | Full bandwidth | 0.5–500 Hz |
| Input impedance | 1000 GΩ | 100 MΩ | 200 GΩ |
| Input referred noise |
1.52 μV rms (1 Hz-10 kHz) |
< 1 μV rms (0.5–2 kHz) |
0.169 μV rms (0.5–500 Hz) |
| DC tolerance | ±3 V | ±300 mV | ±85 mV |
| CMRR | 100 dB | 110 dB | 134 dB |
| Maximum resolution of the ADC | Purely analog output | 16 bits | 24 bits |
| Maximum sampling frequency | Purely analog output | 100 kSPS | 1 kSPS (32 kSPS for wired) |
| Hours of continuous operation | 200 (4 batteries 9 V) | Mains powered | 8 (1 Ah lithium battery) |
| Wireless capability | No | No | Yes (Zigbee) |
| Area (length × width) | 350 cm2 | 500 cm2 | 44 cm2 (PCB area) |