impedance properties

Impedance Properties of Multi-Optrode Biopotential Sensing Arrays

Author(s): Nigel Hamilton Lovell
Impedance Properties of Multi-Optrode Biopotential Sensing Arrays IEEE Transactions on Biomedical Engineering (TBME)
This work demonstrates the advantage of using an optically inspired, liquid-crystal based biopotential recording technology over a conventional electrode and amplifier system. This optical electrode (optrode) system is favorable for its ability to adjust the input impedance levels in dense-array configurations. We conducted a benchtop experiment and circuit simulations to investigate the relationship between liquid-crystal transducer and interface impedances and the recording-site size in order to better understand the impedance properties of optrodes. This work is the starting point to optimize the layout and configuration of multi-optrode arrays to target various biomedical applications. read more