Abstract :
An on-off element with positive and negative variable triggering levels, magnitudes, and hysteresis is presented. It contains supplementary polarized Schmitt triggers and logic sequential devices built from discrete transistors and components or integrated circuits. Using this on-off element, it may be obtained in practice, all types of theoretic symmetrical and asymmetrical characteristics, inclusively that of an ideal on-off element, their totality being represented by a generalized characteristic. Depending on the hysteresis polarity, several types of peculiar generalized characteristics are distinguished. From each of them considering the triggering levels, the magnitudes and the hysteresis as variables, more peculiarized characteristics result. An example illustrates the application of the on-off element with generalized characteristic to a relay control system, in order to improve its stability and dynamic response.
