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Current Waveforms for Neural Stimulation-Charge Delivery With Reduced Maximum Electrode Voltage

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2 Author(s)
Halpern, M.E. ; Dept. of Electr. & Electron. Eng., Univ. of Melbourne, Parkville, VIC, Australia ; Fallon, J.

This paper contains results on the design of electrical signals for delivering charge through electrodes to achieve neural stimulation while reducing the peak electrode voltage. A generalization of the usual constant current stimulation phase to a stepped current waveform is presented. Techniques based on optimization and linear dynamic system theory are then applied to design the magnitude of each current segment in such a way as to minimize the maximum electrode voltage, while transferring a designated quantity of charge in a specified time. Experimental results are provided which validate the approach in saline and in neural tissue.

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Biomedical Engineering, IEEE Transactions on  (Volume:57 ,  Issue: 9 )