Extraction of Cole-Cole model parameters through low-frequency measurements

A novel in-direct method for extracting the four parameters of the single dispersion Cole-Cole model is introduced in this Letter. Compared with the corresponding already introduced methods, the main offered advantage is the relaxed unity-gain bandwidth requirement of the employed active element. This is originated from the fact that only measurements from dc to the cutoff frequency of the realized filter function are required. Experimental results using apples are provided and their comparison with those obtained using a LCR tester confirm the accuracy of the proposed method.