On the noise performance of pt electrodes.
We measured the noise and impedance from Pt electrode pairs in a frequency band from 100 Hz to 10 kHz, containing the ENG band (500 Hz 5 kHz). The results show that the Pt electrode noise is the same as the thermal noise from the real part of the electrode impedance, which is a summation of the polarisation resistance and the access resistance. This differs from Ag-AgCl electrodes for which the electrode noise has been reported to be higher than the thermal noise. Our study shows that Pt electrodes are suitable for neural recording.
Liu
Xiao
X
Department of Electronic and Electrical Engineering, University College London, London, UK. x.liu@ee.ucl.ac.uk
Demosthenous
Andreas
A
Donaldson
Nick
N
D017097:Electric Impedance; D004566:Electrodes; D004594:Electrophysiology / Q000295:instrumentation / Q000379:methods*; D017136:Ion Transport / Q000502:physiology; D008962:Models, Theoretical; D009474:Neurons / Q000502:physiology; D012834:Silver / Q000737:chemistry; D018030:Silver Compounds / Q000737:chemistry
D018030:Silver Compounds; D012834:Silver; C037548:silver chloride