Scott, J. B., & Seshadri, S. (2018). Corrections to Compact Nonlinear Model of an Implantable Electrode Array for Spinal Cord Stimulation. IEEE Transactions on Biomedical Circuits and Systems, PP(99). https://doi.org/10.1109/TBCAS.2018.2833481
Permanent Research Commons link: https://hdl.handle.net/10289/12001
Reference  describes the construction of a model of the electrode-electrolyte interface and the surrounding electrolyte for a platinum-electrode array used in Spinal Cord Stimulation (SCS) applications. In that paper, a key advancement was a compact equivalent-circuit model of a constant phase element (CPE) that can be entered into the SPICE simulator. The authors of  relied heavily on mathematics taken from  by Morrison. While the mathematics in  produces a zero error in phase, it results in a finite error in magnitude. Morrison makes no claim about this error in the magnitude approximation, which escaped the authors of . Morrison does not explain how he arrived at (18), and (19) proves to be incorrect.
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