  Nonlinearity is a central feature in demanding computing applications that
aim to deal with tasks such as optimization or classification. Furthermore, the
consensus is that nonlinearity should not be only exploited at the algorithm
level, but also at the physical level by finding devices that incorporate
desired nonlinear features to physically implement energy, area and/or time
efficient computing applications. Chaotic oscillators are one type of system
powered by nonlinearity, which can be used for computing purposes. In this work
we present a physical implementation of a tunable Chua's circuit in which the
nonlinear part is based on a nonvolatile memristive device. Device
characterization and circuit analysis serve as guidelines to design the circuit
and results prove the possibility to tune the circuit oscillatory response by
electrically programming the device.
