The impedance model represents a series connection of a resistor and either an inductor or capacitor.

The linear impedance connects the complex voltage v with the
complex current i by i*Z = v.
The impedance Z_ref = R_ref + j*X_ref is given as complex input signal, representing the
resistive and reactive component of the input impedance. The resistive
component is modeled temperature dependent, so the real part R_actual = real(Z) is determined from
the actual operating temperature and the reference input resistance real(Z_ref).
The reactive component X_actual = imag(Z)
is equal to imag(Z_ref) if frequencyDependent = false.
Frequency dependency is considered by frequencyDependent = true, distinguishing two cases:
imag(Z_ref) > 0: inductive caseX_actual is proportional to f/f_refimag(Z_ref) < 0: capacitive caseX_actual is proportional to f_ref/f
A zero crossing of the real or imaginary part of the impedance signal Z_ref could cause
singularities due to the actual structure of the connected network.
Resistor, Conductor, Capacitor, Inductor, Impedance, Admittance, Variable resistor, Variable conductor, Variable capacitor, Variable inductor, Variable admittance