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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

Modulating the energy storage of supercapacitors by mixing close-to-ideal and far-from-ideal capacitive carbon nanofibers

The quest for high performance supercapacitors from the energy-power point of view is commonly addressed from the constituting electrode materials and/or the electrolyte. Carbon-based double-layer capacitors are known for their high power density, whereas pseudocapacitors which use transition metal oxides/nitrides/sulfides or conductive polymers are known for their high energy density. In this

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

Frational Order Inverse Filters Based on CCII Family

This paper proposes two generalized topologies of fractional order inverse filters (FOIF). All possible realizations of each topology are investigated using the second generation current conveyor (CCII) family. Inverse fractional highpass (IFHPF), inverse fractional bandpass (IFBPF), and inverse fractional lowpass (IFLPF) filters are realized using the same topology based on the generalized

Energy and Water
Circuit Theory and Applications

8-GHz low-power voltage-mode second-order allpass filter in 65-nm CMOS

In this paper, a CMOS wide-band low-power second-order voltage-mode allpass filter design is proposed as a true time delay element. The proposed allpass filter core design consists of a single transistor, three resistors, one capacitor and one inductor. As a time delay element, the proposed circuit exhibits a group delay of 34 ps within a bandwidth of 8 GHz while consuming only 926 μW from a 1-V

Circuit Theory and Applications

Interfacial modification of perovskite solar cell using zno electron injection layer with pdms as antireflective coating

Recently, perovskite solar cells (PSCs) exhibits tremendous power conversion efficiency and has shown enhanced figures of merit being secured regarding cell stability. In this paper, perovskite solar cell with Zno electron injection layer is presented. The humidity degradation of the perovskite active layer and the efficiency of the cell is observed under several conditions. Using ZnO as a planner

Energy and Water
Circuit Theory and Applications

Tunable fractional-order band-pass filter of order 2α

In this work, a novel implementation of a tunable fractional-order bandpass filter of order 2α is proposed. The transfer function of the presented filter is approximated using the second-order Continued Fraction Expansion (CFE) approximation technique. The filter transfer function is realized using the Inverse Follow the Leader Feedback (IFLF) structure. The Operational Transconductance Amplifiers

Circuit Theory and Applications

N-digits ternary carry lookahead adder design

Carry lookahead adders (CLAs) are extensively used in digital circuits due to their logarithmic computational time (O(log n)) compared to linear computational time(O(n)) in the ripple carry adders. In this paper, two design approaches for N-digits ternary logic CLA based on K-map and threshold logic methods are proposed in addtion to their realization using CNTFETs only and memristor with CNTFETs

Circuit Theory and Applications
Innovation, Entrepreneurship and Competitiveness

Fractional order Chebyshev-like low-pass filters based on integer order poles

Chebyshev filter is one of the most commonly used prototype filters that approximate the ideal magnitude response. In this paper, a simple and fast approach to create fractional order Chebyshev-like filter using its integer order poles is discussed. The transfer functions for the fractional filters are developed using the integer order poles from the traditional filter. This approach makes this

Circuit Theory and Applications