  Logical RS flip-flop circuits are investigated once again in the context of
discrete planar dynamical systems, but this time starting with simple bilinear
(minimal) component models based on fundamental principles. The dynamics of the
minimal model is described in detail, and shown to exhibit some of the expected
properties, but not the chaotic regimes typically found in simulations of
physical realizations of chaotic RS flip-flop circuits. Any physical
realization of a chaotic logical circuit must necessarily involve small
perturbations - usually with quite large or even nonexisting derivatives - and
possibly some symmetry-breaking. Therefore, perturbed forms of the minimal
model are also analyzed in considerable detail. It is proved that perturbed
minimal models can exhibit chaotic regimes, sometimes associated with chaotic
strange attractors, as well as some of the bifurcation features present in
several more elaborate and less fundamentally grounded dynamical models that
have been investigated in the recent literature. Validation of the approach
developed is provided by some comparisons with (mainly simulated) dynamical
results obtained from more traditional investigations.
