  Since its inception the memristive fuse has been a good example of how small
numbers of memristors can be combined to obtain useful behaviours unachievable
by individual devices. In this work, we link the memristive fuse concept with
that of the Complementary Resistive Switch (CRS), exploit that link to
experimentally demonstrate a practical memristive fuse using TiOx-based ReRAM
cells and explain its basic operational principles. The fuse is stimulated by
trains of identical pulses where successive pulse trains feature opposite
polarities. In response, we observe a gradual (analogue) drop in resistive
state followed by a gradual recovery phase regardless of input stimulus
polarity; echoing traditional, binary CRS behaviour. This analogue switching
property opens the possibility of operating the memristive fuse as a
single-component step change detector. Moreover, we discover that the
characteristics of the individual memristors used to demonstrate the memristive
fuse concept in this work allow our fuse to be operated in a regime where one
of the two constituent devices can be switched largely independently from the
other. This property, not present in the traditional CRS, indicates that the
inherently analogue memristive fuse architecture may support additional
operational flexibility through e.g. allowing finer control over its resistive
state.
