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General fractional order mem-elements mutators

This paper proposes the realization of grounded and floating fractional order mem-elements (FOMEs) based on two- and three-port mutators, respectively. Three different topologies based on two-port mutators are implemented using the four members of the second-generation current conveyor (CCII) family which is useful to achieve several realizations for the same circuit. The Fractional Order Mem

Circuit Theory and Applications

Generalized two-port network based fractional order filters

This paper proposes a general prototype fractional order filter based on a two-port network concept with four external impedances. Three induced classifications from the general prototype are extracted with one, two and three external impedances, achieving ten possible generalized topologies. The external impedances are fractional-order elements and resistors. There are forty-six filters divided

Circuit Theory and Applications

Generic Hardware of Fractional Order Multi-Scrolls Chaotic Generator Based on FPGA

Exploring the implementation of fractional calculus is essential to be adequately used in several applications. This paper introduces an FPGA design methodology of fractional order multi-scrolls chaotic system. Hardware resources comparison proves the efficiency of the proposed method. The designs are simulated using Xilinx ISE 14.7 and realized on FPGA Xilinx Artix 7. Different interesting

Circuit Theory and Applications

Analysis and Design of Fractional-order Low-pass Filter with Three Elements of Independent Orders

This paper studies a new fractional-order form for the active low-pass filter. The form was mainly generated from generalizing an active second-order low-pass filter with three capacitors to the fractional-order domain with three independent orders. The transfer function introduced an extra term in the denominator comprising the third fractional order. The effect of the third fractional-order

Circuit Theory and Applications

Toward Portable Bio-impedance devices

Bio-impedance measurement has been used as an indicator for specific physical and chemical changes in food products, fruits and vegetables, cancer detection and other applications. In this paper, a portable wireless bio-impedance measurement embedded system, based on the AD5933 chip, is introduced. The system is calibrated using a parallel RC network and the industry standard electrochemical

Circuit Theory and Applications

Power tracking controller design for photo-voltaic systems based on particle swarm optimization technique

Solar energy turns into a promising supply of electricity, so structures of Photo-voltaic (PV) regularly use a maximum power point tracking (MPPT) way to deliver the highest probable power to the load continuously. This paper presents the methodology of PI controller tuning of PV employing Particle Swarm Optimization (PSO). The aim is to obtain the maximum power and maintain its value using the PI

Circuit Theory and Applications

Mathematical analysis of gene regulation activator model

This paper presents a complete analysis of the mathematical model of the gene regulation process. The model describes the induced gene expression under the effect of activators. The model differential equations are solved analytically, and the exact solution of the gene model is introduced. Moreover, a study of the model dynamics, including the fixed points and stability conditions are presented

Healthcare
Circuit Theory and Applications

Memristor-CNTFET based Ternary Comparator unit

This paper proposes a new design for ternary logic comparator unit based on memristive threshold logic concept. To provide high-performance design, integrating memristor and Carbon Nano-Tube Field-Effect Transistor, CNTFET, is used. A comparison with other related work is presented to discuss performance aspects. It shows that performance has been improved by 75% compared with the other related

Circuit Theory and Applications

FPGA Speech Encryption Realization Based on Variable S-Box and Memristor Chaotic Circuit

This paper introduces a new encryption/decryption scheme based on a dynamic substitution box concept. Values of the proposed S-Box are different for each sample depending on the behavior of a memristor-based chaotic system. MATLAB simulations and FPGA implementation for the circuit are presented with throughput 4.266 Gbit/s. Also, FPGA realization for encryption/decryption scheme is proposed

Circuit Theory and Applications
Software and Communications

Radiographic images fractional edge detection based on genetic algorithm

Recently, fractional edge detection algorithms have gained focus of many researchers. Most of them concern on the fractional masks implementation without optimization of threshold levels of the algorithm for each image. One of the main problems of the edge detection techniques is the choice of optimal threshold for each image. In this paper, the genetic algorithm has been used to get the optimal

Circuit Theory and Applications