  We present the circuit equivalent of the Landau-Khalatnikov dynamical
ferroelectric model. The differential equation for hysteretic behavior is
subject to numerical computer simulations. The size and shape of the simulated
hysteretic loops depends strongly on the frequency and the amplitude of the
driving electric field. This dependence makes the experimental extraction of
the coercive electric field difficult. The bifurcation of the driven
Landau-Khalatnikov model is explained in detail.
