Circuit parameters current waveform

This can be verified by substituting the expression for v t) into the differential equation model and performing the indicated operations. The fact that v t) can be shown to have this form indicates that it is possible for this circuit to sustain oscillatory voltage and current waveforms indefinitely. When the parametric expression for v(t) is substituted into the differential equation model the value of co that is compatible with the solution of the equation is revealed to be ct) = l/.-/(LC). This is an example of the important fact that the frequency at which an electrical circuit exhibits resonance is determined by the physical value of its components. The remaining parameters ofv(t), K, and (p are determined by the initial energy stored in the circuit (i.e., the boundary conditions for the solution to the differential equation model of the behavior of the circuit s voltage). 

The parameter extraction through equivalent circuit has been applied by several researchers and can help in understanding the material and electrochemical properties of the subcomponents in the MEA. A typical impedance set-up is shown in Fig. 25 that includes a fast Fourier transform (FFT) based frequency response analyzer with a signal generator, an oscilloscope to check the generated waveform, a current measuring device... 

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