memristor
Very few people think of an instantaneous resistor. The ratio of voltage to current is the resistance. This term is usually reserved for the time independent, steady state ratio of V to I.
Impedance is defined for sinusoids only in memory devices (caps and Ls). Steady state ratio of V to i is accompanied by a square root of -1.
Resistance is time independent, i.e. no time dependence at all.
Years ago I argued with a distinguished professor about the concept of instantaneous resistance, or impedance. This new component is based upon this very concept.
Note that in the IEEE spectrum article R is defined in the set of equations as dV/di.
and dq/dV=c, and dphi/dt=L, and dphi/dq=M.
These are differential relationships. You aren't used to viewing them in the instantaneous mode. Yet they exist. Thus, the relationship for M is a resistance, only it is time dependent! Just like for caps and Ls!.
It is a new component. It might be slow, it might have parasitics, it might be temperature sensitive, it might have all kinds of bugs. It is a new component folks. Not just a new kind of transistor or resistor or cap or L. This thing has a new relationship of V to i. That's big news to every charge-jockey in the world.
Biting the hand that feeds IT
