%0 Journal Article
%@ 1932-4545
%A Jiang, D
%A Demosthenous, A
%D 2018
%F discovery:10049968
%J IEEE Transactions on Biomedical Circuits and Systems
%K Chopped pulse, electric crosstalk, mixed-signal  integrated circuit, multichannel neural stimulator, power isolation
%N 4
%P 940-953
%T A Multichannel High-Frequency Power-Isolated Neural Stimulator With Crosstalk Reduction
%U https://discovery.ucl.ac.uk/id/eprint/10049968/
%V 12
%X In neuroprostheses applications requiring simultaneous stimulations on a multielectrode array, electric crosstalk, the spatial interaction between electric fields from various electrodes is a major limitation to the performance of multichannel stimulation. This paper presents a multichannel stimulator design that combines high-frequency current stimulation (using biphasic charge-balanced chopped pulse profile) with a switched-capacitor power isolation method. The approach minimizes crosstalk and is particularly suitable for fully integrated realization. A stimulator fabricated in a 0.6 & #x03BC;m CMOS high-voltage technology is presented. It is used to implement a multichannel, high-frequency, power-isolated stimulator. Crosstalk reduction is demonstrated with electrodes in physiological media while the efficacy of the high-frequency stimulator chip is proven in vivo. The stimulator provides fully independent operation on multiple channels and full flexibility in the design of neural modulation protocols.
%Z This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/