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Table 3 Comparison of the proposed instrument with the Warner amplifier and the bioamplifier included in Powerlab 26 T

From: A high-performance 8 nV/√Hz 8-channel wearable and wireless system for real-time monitoring of bioelectrical signals

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)