Simple Circuit Equivalents for the Constant Phase Element
Applied Physics
2021-03-30 v1 Materials Science
Abstract
The constant phase element (CPE) with a frequency-independent negative phase between current and voltage is used extensively in e.g. the bioimpedance and electrochemistry fields. Its physical meaning is only partially understood. Here we show that the responses of both the common capacitive CPE as well as the inductive CPE are exactly the same as those of simple RL and RC circuits where the inductor's or capacitor's value increases linearly with time. The resulting step and impulse responses are found and verified by simulation with the Micro-Cap simulation program. The realization with time-varying components correlates with known time-varying properties in applications.
Cite
@article{arxiv.2007.05821,
title = {Simple Circuit Equivalents for the Constant Phase Element},
author = {Sverre Holm and Thomas Holm and Ørjan Grøttem Martinsen},
journal= {arXiv preprint arXiv:2007.05821},
year = {2021}
}
Comments
14 pages, 4 figures