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2 Fundamental Properties of Mem-Elements
Fig. 2.19 (a) Memristor with a piecewise linear characteristic useful for implementing a digital
memory. (b) Switchings between two different values of memductance when the memristor is
subject to a voltage square wave. The example is adapted from [4]
2.3 Memristive Devices and Systems
Some main theoretic properties of an ideal memristor are preserved by a broader
class of nonlinear dynamical systems, named memristive devices or in general
memristive systems, introduced by L. O. Chua and S. Kang in the seminal article [1].
In the current-controlled case a memristive system obeys the state-dependent
Ohm’s law
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