期刊
MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING
卷 46, 期 10, 页码 997-1003出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11517-008-0386-z
关键词
electrode noise; Pt electrode; impedance measurement; implantable neuroprostheses; neural signal recording; noise measurement
类别
资金
- UK Engineering and Physical Sciences Research Council [GR/S93790/01]
- European Union
- Engineering and Physical Sciences Research Council [EP/F009593/1, GR/S93790/01] Funding Source: researchfish
- EPSRC [EP/F009593/1] Funding Source: UKRI
The noise from Pt electrodes has not been measured before. We measured the impedance and noise between pairs of Pt electrodes in cylindrical cells within frequency bands which contain the electroneurogram band (ENG, 500-10 kHz). The results show that the noise from the Pt-saline interface and also the volume conductor are the same as the thermal noise from the real part of those impedances. This means that Pt electrodes are convenient for neural recording because the total source noise from the electrodes and the volume conductor (tissue) can be estimated from the measured total impedance and calculating the thermal noise associated with the resistive part. This differs from Ag/AgCl electrodes for which the interface noise has been reported to be higher than the thermal noise, and therefore calculation of the total noise will be more difficult.
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