US Patent 10157668 Memristance feedback tuning

An example device in accordance with an aspect of the present disclosure includes at least one current comparator, a plurality of threshold currents, and a controller. The current comparator is to compare a memristor current to a plurality of threshold currents. The controller is to set a desired memristance state of a memristor according to a memristance feedback tuning loop based on a plurality of threshold levels. The controller is to apply positive and negative voltages to the memristor during the feedback tuning loop to achieve the desired memristance state of the memristor.