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. Author manuscript; available in PMC: 2014 Sep 1.
Published in final edited form as: IEEE J Solid-State Circuits. 2013 Sep;48(9):2203–2216. doi: 10.1109/JSSC.2013.2266862

Fig. 9.

Fig. 9

Stimulation efficiency analysis using (a) a simplified electrodes and tissue model (RS and CDL), and (b) stimulation current and voltage waveforms.