A nonlinear resistor and nonlinear inductor using a nonlinear capacitor

Ferroelectric capacitors whose rated voltage is basically defined by the requirement of a fair linearity of the (generally nonlinear) capacitors’ voltage–charge characteristic, not by the breakdown voltage, which can be much higher, are widely used today. It is noted, and considered with some details, that the use of such a capacitor in a simple switched-capacitive circuit which imitates a resistance enables a nonlinear frequency-controllable resistance to be obtained, and that the use of such a capacitor as a load for a gyrator circuit enables a nonlinear inductor to be obtained. The topic is interesting from the basic circuit theory aspect, in view of the fact that ferroelectric ceramic capacitors are widely used today, and because of the need to find ways for integral implementation of different nonlinear elements.