Realization of Constant Phase Element in Metallic Electodes for Interference Reduction in Neural Recording Tripoles

摘要

Recording neural signals using implanted Pt-electrodes in a tripolar arrangement is affected by myoelectric interference present at the interface. In this paper we present a way of realizing the frequency response exhibited by a constant phase element (CPE) of metal electrodes and use this for the removal of interference. Simulation results show that our CPE is very close to the ideal case in the bandwidth we are interested in (i.e. 500 Hz to 10 kHz), while fitting past neutralization data reveals that removing interference now requires no adjustment.