International Journal of Circuit Theory and Applications

Cover image for Vol. 42 Issue 8

Edited By: Ángel Rodríguez-Vázquez

Impact Factor: 1.21

ISI Journal Citation Reports © Ranking: 2013: 126/247 (Engineering Electrical & Electronic)

Online ISSN: 1097-007X

Most Cited


Read the most cited articles published since 2009


A new approach for using the pathological mirror elements in the ideal representation of active devices
Ramy A. Saad, Ahmed M. Soliman

This paper is adopting a new approach to investigate the capabilities of pathological mirror elements in the ideal representation of active building-blocks and shows that the voltage mirror (VM) and current mirror (CM) are the basic pathological elements. The descriptions for the floating mirror elements in the nodal admittance matrix (NAM), using infinity-variables, are derived. The descriptions for nullator and norator using infinity-variables in the NAM are shown to represent special cases from the derived descriptions of the floating VM and the CM, respectively. Hence, new representations for the nullator and norator in terms of the floating VM and CM, respectively, are obtained. Read the entire abstract.

Volume 38, Issue 2, March 2010, pages 148-178

Abstract  |  Full Text Article


Symbolic analysis of (MO)(I)CCI(II)(III)-based analog circuits
E. Tlelo-Cuautle, C. Sánchez-López, D. Moro-Frías

New nullor-based models are introduced to describe the behavior of the first generation current conveyor (CCI), second generation current conveyor (CCII), third generation current conveyor (CCIII), their inverting equivalents (ICCI(II)(III)), and/or their multiple output topologies (MO(I)CCI(II)(III)). Read the entire abstract.

Volume 38, Issue 6, August 2010, pages 649-659

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A mixed-mode KHN-biquad using DVCC and grounded passive elements suitable for direct cascading
Shahram Minaei, Muhammed A. Ibrahim

In this paper a mixed-mode (input and output signals can be current or voltage) Kerwin-Huelsman-Newcomb (KHN) biquad with low/high input impedance and high/low output impedance depending on the type of the corresponding signal (current/voltage) is presented. The circuit is constructed using three differential voltage current conveyors (DVCCs), two grounded capacitors and three grounded resistors. The circuit simultaneously provides bandpass (BP), highpass (HP) and lowpass (LP) responses when the output is current and notch, BP and LP responses when the output is voltage. Read the entire abstract.

Volume 37, Issue 7, September 2009, pages 793-810

Abstract  |  Full Text Article


A DC/DC converter topology for renewable energy systems
Huang-Jen Chiu, Chun-Jen Yao, Yu-Kang Lo

This paper presents a DC/DC converter topology for renewable energy systems. The proposed DC/DC converter can be used to obtain a well-regulated output voltage from low-voltage power source, such as wind turbine, photovoltaic array, fuel cell, etc. It has the merits of high efficiency, low device stresses, and low current ripple. Read the entire abstract.

Volume 37, Issue 3, April 2009, pages 485-495

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Convergence analysis of general neural networks under almost periodic stimuli
Zhenkun Huang, S. Mohamad, Xinghua Wang, Chunhua Feng

In this paper, we investigate the convergence dynamics of 2N almost periodic encoded patterns of general neural networks subjected to external almost periodic stimuli, including almost periodic delays. Invariant regions are established for the existence of 2N almost periodic encoded patterns under two classes of activation functions. Read the entire abstract.

Volume 37, Issue 6, August 2009, pages 723-750

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Z Copy-Controlled Gain-Current Differencing Buffered Amplifier and its applications
Dalibor Biolek, Josef Bajer, Viera Biolková, Zdenek Kolka, Michal Kubícek

The Z Copy-Controlled Gain-Current Differencing Buffered Amplifier (ZC-CG-CDBA) is introduced in the paper. In addition to the well-known CDBA, the input Current Differencing Unit (CDU) is modified and completed by special circuits. Analogously to the conventional CDBA, the z terminal is internally connected to the input of voltage buffer. Read the entire abstract.

Volume 39, Issue 3, March 2011, pages 257-274

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Novel interleaved ZVS converter with ripple current cancellation
B.-R. Lin, C.-L. Huang, M.-Y. Li

This paper presents a zero voltage switching (ZVS) converter with interleaved pulse-width modulation scheme. An active clamp circuit is adopted in the proposed converter to recycle the energy stored in the leakage inductor of the transformer and reduce the voltage stress of the main power switch in the converter. The ZVS feature of switches can be achieved due to the resonance during the transition interval of two power switches. Read the entire abstract.

Volume 37, Issue 3, April 2009, pages 413-431

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Electronically controlled multiphase sinusoidal oscillators using current amplifiers
George Souliotis, Costas Psychalinos

A novel current-mode multiphase oscillator topology is introduced in this letter. This is realized by employing current amplifiers and only grounded capacitors. Attractive characteristics offered by the new topology are the electronic adjustment of the oscillation frequency, the absence of passive resistors, and the requirement of only grounded capacitors. Read the entire abstract.

Volume 37, Issue 1, February 2009, pages 43-52

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Sinusoidal oscillators with explicit current output employing current-feedback op-amps
S. S. Gupta, R. K. Sharma, D. R. Bhaskar, R. Senani

Employing a state-variable synthesis, a number of new current-mode oscillators with explicit current output have been derived, which can be practically implemented from commercially available current-feedback op-amps (CFOA). Read the entire abstract.

Volume 38, Issue 2, March 2010, pages 131-147

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Design and implementation of an interleaved soft-switching converter with output voltage doubler
B.-R. Lin, J.-J. Chen

An interleaved pulse-width modulation (PWM) converter with less power switches is presented in this paper. The buck type of active clamp circuit is used to recycle the energy stored in the leakage inductor of a transformer. The zero voltage switching (ZVS) turn-on of power switches is realized by the resonance during the transition interval of power switches. At the secondary side of transformers, two full-wave rectifiers with dual-output configuration are connected in parallel to reduce the current stresses of the secondary windings of transformers. In the proposed converter, power switches can accomplish two functions of the interleaved PWM modulation and active clamp feature at the same time. Read the entire abstract.

Volume 38, Issue 2, March 2010, pages 179-197

Abstract  |  Full Text Article

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