Similarly, and by another method, also based on the analysis of the curve (v = f (t)) and considering that at the initial instant of the stimulus capacitor (Cp) is 100% conductive and the voltage measured at the point (start pulse) corresponds to the voltage across the resistor Ra (for this measurement the stimulation sequence with shorter pulse width will be used); and instead, the end of the pulse, ie when the stimulus ends, the capacitor is now 100% loaded and therefore do not conduct current, measured at this point then voltage will correspond to the voltage across R and Rp placed in series (for this measurement the stimulation sequence with the width longer pulse will be used). This last analysis, it can calculate the value of the currents, and therefore approximate the value of capacitor Cp in each case.