Title :
On the Noise Performance of Pt Electrodes
Author :
Xiao Liu ; Demosthenous, A. ; Donaldson, N.
Author_Institution :
Univ. Coll. London, London
Abstract :
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.
Keywords :
bioelectric potentials; biomedical electrodes; neurophysiology; platinum; prosthetics; thermal noise; ENG band; Pt; access resistance; electrode impedance; electrode noise; electroneurogram signal; frequency 100 Hz to 10 kHz; neural recording; neuroprostheses; noise performance; platinum electrodes; polarisation resistance; thermal noise; 1f noise; Conductors; Electrodes; Frequency; Immune system; Impedance measurement; Low-frequency noise; Noise measurement; Polarization; Thermal resistance; Electric Impedance; Electrodes; Electrophysiology; Ion Transport; Models, Theoretical; Neurons; Silver; Silver Compounds;
Conference_Titel :
Engineering in Medicine and Biology Society, 2007. EMBS 2007. 29th Annual International Conference of the IEEE
Conference_Location :
Lyon
Print_ISBN :
978-1-4244-0787-3
DOI :
10.1109/IEMBS.2007.4352316
