Unexpected Analog Signal Change Detector Based on Memristive System

Abstract

This paper introduces the possibility of utilizing memristive systems for analog signal processing. The design takes advantage of the specific properties of the mem element for processed signal filtering with a requirement for change detection. The polarity of the voltage on the mem element causes a change in its internal state. The induced change causes the comparator to flip and initiates audio and optical signaling. The proposed circuit is suitable for various detectors with binary outputs, e.g. motion, pressure, light, temperature, etc. The functionality is verified by measurements on a specific implemented prototype, which processes the signal from an optical fiber sensor detecting temperature changes. The temperature change causes a change in polarization, which can be pre-processed with a polarizer.