The Dynamic Tunability of Memristor-Based Active Filters

Abstract

When the memristor was fabricated for the first time, it launched an entirely new field of research. Many of the published papers regarding memristors are primarily theoretical and are based on computer simulations. Some recent papers analyze the memristor’s programming circuits, but to the best of the authors’ knowledge, no memristor has been embedded into a commercial analog circuit. This paper is practically oriented and it is based on the experimental results obtained by measurements on the circuit prototype. We present a solution for automated programming of a commercially available memristor and its implementation in tunable active bandpass filter design. The novelty of this paper is that the active bandpass filter’s central frequency could be programmed during the filter operation, so a pause for memristor state-switching is not required. The experimental results are promising, and open up possibilities for the memristor’s application in analog systems.

Overview of Memristor-Based Design for Analog Applications

“…The simulated and measured amplitude responses of the filter for the two states are presented in Figure 3b [33]. As shown in Figure 3b [33], there is good agreement between the simulated and measured results, indicating that the filter design is accurate and reliable. This consistency validates the effectiveness of the filter in both states.…”

“…The memristor resistance (Z m ) in the first state is 10 kΩ, while in the second state it is 3 kΩ. The simulated and measured amplitude responses of the filter for the two states are presented in Figure 3b [33]. As shown in Figure 3b [33], there is good agreement between the simulated and measured results, indicating that the filter design is accurate and reliable.…”

“…The authors in [33] present a solution for the automated programming of a commercially available memristor in a tunable active bandpass filter design. They demonstrate the effectiveness of their approach through simulations and experimental results, proving the feasibility of using memristors in practical electronic applications.…”

“…This flexibility opens new possibilities for the design of adaptive filtering systems. Figure 3a [33] displays the proposed design. It includes a memristor-based tunable active bandpass filter that removes the memristor-based programming signal from the output of the circuit.…”