Binary memcapacitor based first-order active filter. Issue 2 (28th January 2020)

• Record Type: Journal Article
• Authors: Gan, Huijun; Yu, Dongsheng; Li, Dongkun; Cheng, He
• Is Part Of: Circuit world. Volume 46:Issue 2(2020)
• Page Start: 117
• Page End: 124
• Publication Date: 2020-01-28
• Subjects: High-pass filter -- Low-pass filter -- Memcapacitor -- PSPICE; C92; Electronic circuits -- Design and construction -- Periodicals; Electronic circuits -- Periodicals; 621.381505
• DOI: 10.1108/CW-06-2019-0061
• Languages: English
• ISSNs: 0305-6120

Abstract

Abstract : Purpose: The purpose of this paper is to construct a flux-controlled memcapacitor (MC) emulator without grounded restriction with the binary operation ability. The active first-order low-pass filter (LPF) and high-pass filter (HPF) circuits are constructed by replacing the capacitor with MC. Design/methodology/approach: The output saturation of the active device is innovatively adopted to realize the binary operation of MC with two memcapacitance values. By applying the direct current control voltage together with the input signal, the memcapacitance can be controlled, and hence, cut-off frequency of the filters can be adjusted without changing the circuit structure. Findings: Experiments and simulation results show that the new filter has good frequency selectivity. Both LPF and HPF can change the cut-off frequency by changing the positive and negative control voltage. The experimental and simulation results are in good agreement with the theoretical analysis, which proves the feasibility and validity of the emulator and the filters. Originality/value: These MC emulators are simple and easy to physically fabricate, which have been increasingly used for experiment. It also provide an effective reference for device miniaturization and low power consumption.