Table 2 Overall circuit parameters

Input voltage noise density

$4.8\mathrm{nV}/\sqrt{\mathrm{Hz}}$

Input current noise density

${}^{*}2.8\mathrm{fA}/\sqrt{\mathrm{Hz}}$

Input Impedance

*5 TΩ | 18 pF

THD (@1 kHz, 0.2 V)

0.0012%

CMRR (@100Hz)

115 dB

Mid-band gain

89 dB

Bandwidth

5 Hz-10 kHz

Max input voltage swing

±180 mV

Power supply

±9 V Batteries

Total current

64.2 mA

Printed circuit board size

9.9 cm X 5.4 cm

Patient isolation

*2 pF (from mains ground)