Behavioural modelling of memristive devices targeted to sensor interfaces

This paper describes the modelling and application of memristive systems in sensing technology. The proposed architecture is the adoption of memristive devices in place of laser trimming calibration technique to customise a sensor interface. Memristors can also work in combination with analogue and digital electronics to build adaptive systems. Several approaches have been made to overcome some of the disadvantages of laser trimming calibration such as replacing the trimmable resistors with programmable resistor arrays. The ability of the memristor to hold several resistance states can be exploited in an instrumentation amplifier having the memristor as a programmable feedback instead of an array of programmable resistors. A compact behavioural model of the memristor has been developed for the modelling and the simulation of complex circuits for sensor calibration. The model approximates the measurements of the memristor carried out in our labs, and also to simulate memristive logic gates.