Fundamental properties of negative resistors and negative conductors.

This paper deals with the fundamental properties of the two classes of physical components that exhibit a dual and here are consistently referred to as negative resistors and negative conductors. At the outset a definition of negative resistors and negative conductors is given in terms of essential linear and non-linear properties. Linear models are proposed. The conjoint occurrence of specific linear and non-linear properties is explained using a single-loop feedback circuit. Two postulates applying to active components enable one to determine whether a given network realization is either a negative resistor or a negative conductor. When a negative resistor or a negative conductor is to be used in a specified network, the correct choice between these two components is decisive when system stability is taken as a prerequisite. Some useful rules facilitating this choice are given in this paper.
A unified treatment of negative resuctors has been presented in this paper in an attempt to clear up obscurities and unsolved problems that still exist in connection with the essential nature and the physical limitations of negative resuctors. It has been shown that a consistent distinction between the two dual classes of negative resuctors enables one to draw unambiguous conclusions with regard to the stability problem.
Negative resuctors have been investigated in terms of their fundamental properties, linear as well as non-linear. The Linearity Postulate and the Non-linearity Postulate were each in turn found indispensable to explain various experimental results, of which the conjoint occurrence of specific linear and nonlinear properties is most significant.
The applications, which have been treated as an illustration, have shown that straightforward analysis using appropriate equivalent circuits leads to a better understanding of the potentialities and physical limitations of negative resuctors. [ABSTRACT FROM AUTHOR]