Dynamic impedance spectra of programmable dynamically changing RC model based on digital potentiometers

The dataset presents non-stationary impedance spectra of the RC model presented in the figure below. This model contains two digital potentiometers controlled digitally by the microcontroller. This solution allows to programmably control the value of the model impedance. Thanks to this, the model can be used as a test engine for evaluation of the dynamic impedance spectroscopy (DEIS). The impedance spectrum frequency range (1 Hz – 100 kHz) was selected in order to map the whole range of the model impedance changes. Details could be found in the refereced paper. Figure top-right presents exemplary changes of thepotentiometers resistance for the following set of parameters: R2 START = R3 START = 1 kohm, R2 STOP = R3 STOP = 100 kohm. Figure top-left presents the resulting instantaneous impedance spectra for the model presented in Figure bottom-left and for parameters changing according to Figure top-right.