The Role of the Programming Trajectory in the Power Dissipation Dynamics
and Energy Consumption of Memristive Devices
Abstract
 Tuning the conductance of a memristive device is a  process that
requires energy and involves power dissipation. In  this letter, the
role the memory state programming strategy plays  in this connection is
investigated. To this end, the device model  equations representing the
electron transport and metal  ion/oxygen vacancy displacement caused by
the application of an external signal must be solved consistently.
However, if instead of  considering the applied voltage as the model
input, a memory state  trajectory is assumed, the model equations can
be decoupled  allowing an analytic description of the problem. In order
to  accomplish this objective a more accurate version of the dynamic
 memdiode model is used which incorporates additional physical
 considerations in the characteristic switching times. It is
 demonstrated that alternative trajectories (concave, convex, and
 sigmoidal) lead to a variety of energy consumption-maximum
 dissipated power relationships indicating the key role played by  the
selected programming strategy. This kind of study contributes  to the
basic understanding of the writing process of memristors (synaptic
weight assignment) and sheds light on its electrical  consequences. Â