Applications of solid-state memristors in tunable filters

Wizenberg, R., Khiat, A., Berdan, R., Papavassiliou, C. and Prodromakis, T. (2014) Applications of solid-state memristors in tunable filters. IEEE ISCAS, CAS-FEST: Circuits & Systems Society Forum on Emerging & Selected Topics, Melbourne, Australia. 03 - 04 Jun 2014.

Record type: Conference or Workshop Item (Other)

Abstract

In this paper we present a practical approach to employ solid-state TiO₂ memristors as tunable loads in filter configurations. First, memristive devices are employed in discrete realizations of tunable active filter topologies. Using an external programming circuit to set the devices to a desired memristive state enables control of the filter's characteristics, namely pass-band boundaries and quality factor. Utilization of a memristor as a tunable load in low-pass and band-pass filter topologies is then experimentally demonstrated. We further expand this concept by demonstrating an amplitude-controlled gain amplifier topology. In this topology, instead of using external control circuitry to set the memristive state, the state is set internally during operation, providing an automatic gain control.

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