Journals/Books/Book Chapters


 
2019

2017





CMOS fractional-order capacitor/inductor emulator chip (2016)





CMOS fractional-order capacitor emulator chip (2016)

CMOS fractional-order capacitor emulator chip 
List of Journals

Journal

Impact Factor

Publisher

J. Power Sources

7.47

 Elsevier

Energy

5.54

 Elsevier

Scientific Reports

4.52

 Nature

Electrochimica Acta

5.38

 Elsevier

Applied Soft Computing

4.87

Wiley

Complexity

3.514

Wiley

Nonlinear Dynamics

4.61

Elsevier

ChemElectroChem

3.975

 Wiley

J. Electrochemical Society

3.662

 Electrochemical Society (ECS)

J. Franklin Institute

3.653

 Elsevier

Signal Processing

4.08

 Elsevier

Measurement

2.79

 Elsevier

Journal of Applied Physics

2.33

American Inst. Physics (AIP)

Chaos: An Interdisciplinary Journal of Nonlinear Science

2.64

American Inst. Physics (AIP)

IEEE J. Emerging and Selected Topics in Circuits & Systems

3.43

Inst. Electrical Electronic Eng. (IEEE)

IEEE Trans. Circuits & Systems-I-Fundamental Circuit Theory

3.93

Inst. Electrical Electronic Eng. (IEEE)

IEEE Trans. Instrumentation & Measurement

3.07

Inst. Electrical Electronic Eng. (IEEE)

IEEE Circuits & Systems Magazine

4.48

Inst. Electrical Electronic Eng. (IEEE)

IEEE Trans. Circuits & Systems-II- Express Briefs

3.25

Inst. Electrical Electronic Eng. (IEEE)

IEEE Trans. Education

2.27

Inst. Electrical Electronic Eng. (IEEE)

IEEE Trans. Computer Aided Design of Integrated Circuits

2.4

Inst. Electrical Electronic Eng. (IEEE)

Medical & Biological Engineering & Computing

2.04

 Springer

Computers and Electronics in Agriculture

2.502

 Elsevier

FLORA: Morphology Distribution Functional Ecology of Plants

1.6

 Elsevier

Circuits Systems & Signal Processing

1.98

Springer

Chaos Solitons & Fractals

3.06

 Elsevier

Int. J. Circuit Theory & Applications

1.571

 Wiley

Int. J. Bifurcation & Chaos

2.145

 World Scientific

Int. J. Electronics & Communications (AEUE)

2.85

 Elsevier

Int. J. of Food Properties

1.43

Taylor & Francis

Int. J. Electronics

1.07

Taylor & Francis

Int. J. Electrical Engineering Education

0.94

SAGE

Microelectronics Journal

1.28

 Elsevier

Electronics Letters

1.343

 Inst. Engineering and Technology (IET)

Circuits Devices & Systems

1.27

 Inst. Engineering and Technology (IET)

Mathematical Problems in Engineering

1.18

Hindawi

Computers & Electrical Engineering

2.19

 Elsevier

Analog Integrated Circuits and Signal Processing

0.85

 Springer

J. Circuits Systems & Computers

0.6

 World Scientific

Applied Physics Letters

3.52

American Institute of Physics (AIP)

 



2019

  • C. Vastarouchas, C. Psychalinos and A. S. Elwakil, "Novel two-measurements-only Cole-Cole bio-impedance parameters extraction technique," Measurement, vol. 131, no. 1, pp. 394-399, Jan. 2019. 

  • D. A. Yousri, A. M. AbdelAty, L. A. Said, A. S. Elwakil, B. J. Maundy and A. G. Radwan, "Chaotic flower pollination and grey Wolf algorithms for parameter extraction of bio-impedance models," Applied Soft Computing, Elsevier, vol. 75, pp. 750-77, 2019.

  • P. Bertsias⁠, C. Psychalinos⁠⁠, A. S. Elwakil⁠, L. Safari⁠ and S. Minaei, "Design and application examples of CMOS fractional-order differentiators and integrators," Microelectronics J., vol. 83, pp. 155-167, 2019.

  • B. J. Maundy, A. S. Elwakil and D. Zito, "A voltage tunable CMOS differential active resistor and its application," Int. J. Circuit Theory & Applications, vol. 47, no. 1, pp. 175–185, 2019.

  • Z. Said, A. Allagui, M. A. Abdelkareem, A. S. Elwakil, H. Alawadhi, R. Zannerni, K. Elsaid, "Modulating the energy storage of supercapacitors by mixing close-to-ideal and far-from-ideal capacitive carbon nanofibers," Electrochimica Acta, vol. 301, pp. 465-471, April,  2019. 

  • T. Bonny, S. Majzoub and A. S. Elwakil, "Hardware optimized FPGA implementations of high speed true random bit generators based on switching-type chaotic oscillators," Circuits Systems and Signal Processing, vol. 38, no. 3, pp. 1342–1359, 2019.

  • A. A. Al-Ali, B. J. Maundy and A. S. Elwakil, Design and Implementation of Portable Impedance Analyzers,  Springer, ISBN 978-3-030-11783-2, (10.1007/978-3-030-11784-9), 2019.

  • S. Kapoulea, C. Psychalinos and A. S. Elwakil, "One-terminal electronically-controlled fractional-order capacitor and inductor emulator,"  Int. J. Electronics and Communications (AEUE), vol. 103, pp. 32-45, May 2019.

  • T. J. Freeborn and A. S. Elwakil, "Rates and effects of local minima on fractional-order circuit model parameters extracted from supercapacitor discharging using least squares optimization," Circuits Systems and Signal Processing, vol. 38, pp. 1907-1922, May 2019.

  • D. A. Yousri,  A. M. AbdelAty, L. A. Said, A. S. Elwakil, B. Maundy and A. G. Radwan, "Parameter identification of fractional-order chaotic systems using different meta-heuristic optimization algorithms," Nonlinear Dynamics, vol. 95, no. 3, pp. 2491–2542, 2019.

  • P. Bertsias⁠, C. Psychalinos⁠⁠ and A. S. Elwakil, "Partial fraction expansion based realizations of fractional-order differentiators and integrators using active filters," Int. J. Circuit Theory & Applications, vol. 47, no. 4, pp. 513-531, April 2019.

  • B. J. Maundy, A. S. Elwakil and S. Gift, "Enhancing the improved Howland circuit," Int. J. Circuit Theory & Applications, vol. 47, no. 4, pp. 42-47, April 2019.

  • D. Zhang, A. Allagui, A. S. Elwakil, A. M. Nassef, H. Rezk, J. Cheng, W. C. Choy, "On the modeling of dispersive transient photocurrent response of organic solar cells," Organic Electronics, vol. 70, no. 7, pp. 42-47, July 2019.

  • D. Yousri, A. M. AbdelAty, A. G. Radwan, A.S. Elwakil and C. Psychalinos, "Comprehensive comparison based on meta-heuristic algorithms for approximation of the fractional-order Laplacian s^α as a weighted sum of first-order high-pass filters," Microelectronics J., vol. 87, pp. 110-120, May 2019.

  • P. Bertsias⁠, C. Psychalinos⁠⁠, A. S. Elwakil and A. G. Radwan, "Low-voltage and low-power fractional-order parallel tunable resonator," Microelectronics J., vol. 88, pp. 108-116, May 2019.

  • P. Bertsias⁠, C. Psychalinos⁠⁠, A. S. Elwakil and K. Biswas, "Single transistor fractional-order filter using a multi-walled carbon nanotube device," Analog Integrated Circuits and Signal Processing, vol. 100, pp. 215-219, 2019.

  • C. Psychalinos, A. S. Elwakil, B. J. Maundy and A. G. Radwan (Guest Editors), "Editorial note Special Issue on the design and implementation of fractional-order circuits and systems in real-world applications," Microelectronics J., vol. 90, pp. 154-155, 2019.

  • M. Fouda,  A. S. Elwakil, A. Allagui, H. Rezk, A. Nassef, "Convolution-based estimation of supercapacitor parameters under periodic voltage excitations," Journal of The Electrochemical Society, vol. 166, no. 10, pp. 2267-2269,  2019. 

  • B. J. Maundy, A. S. Elwakil  and C. Psychalinos⁠⁠ "Correlation between the theory of Lissajous figures and the generation of pinched hysteresis loops in nonlinear circuits," IEEE Trans. Circuits & Syst.-I: Regular papers, vol. 66, no. 7, pp. 2606-2614, July, 2019.

  • W. Sayed, A. G. Radwan, M. Elnawawy, H. Orabi, A. Sagahyroon, F. Aloul, A. S. Elwakil,  H. Fahmy and A. Elsedeek, "Two-dimensional rotation of chaotic attractors: Demonstrative examples and FPGA realization," Circuits Systems and Signal Processing, DOI: 10.1007/s00034-019-01096-z, 2019.

  • B. J. Maundy and A. S. Elwakil, "Third-order tunable-phase asymmetric cross-coupled oscillator," IET Circuits Devices & Systems, (10.1049/iet-cds.2018.5494), 2019.

  • B. J. Maundy, A. S. Elwakil and L. Belostotski, "Automatic generation of differential-input differential-output 2nd order filters based on a differential pair," IEEE Trans. Computer-Aided Design (10.1109/TCAD.2019.2912933).

  • S. Kapoulea, C. Psychalinos and A. S. Elwakil, "Realizations of simple fractional-order capacitor emulators with electronically-tunable capacitance,"  Integration: the VLSI Journal, (10.1016/j.vlsi.2019.04.004).

  • M. E. Fouda, A. Allagui, A. S. Elwakil, A. Eltawil, and F. Kurdahi, "Supercapacitor discharge under constant resistance, constant current and constant power loads," J. Power Sources, vol. 435, pp.  226829, 2019.

  • M. Fouda, A. Allagui and A. S. Elwakil, "Commercial supercapacitor parameter estimation from step voltage excitation," Int. J. Circuit Theory & Applications, (doi: 10.1002/cta.2680) (in press).



2018



  • A. Abdelaty, A. G. Radwan, A. S. Elwakil and C. Psychalinos, "Transient and steady state response of a fractional-order dynamic PV model under different loads," J. Circuits Systems and Computers, vol. 27, no. 2, pp. 1850023, 2018. 
  • A. Allagui, D. Zhang and A. S. Elwakil, "Short-term memory in electric double-layer capacitors," Applied Physics Letters, vol. 113,  pp. 253901, Dec. 2018 (Doi:10.1063/1.5080404).
  • S. Kapoulea, C. Psychalinos and A. S. Elwakil, "Single active element implementation of fractional-order differentiators and integrators," Int. J. Electronics and Communications (AEUE), vol. 97, no. 12. pp. 6-15, 2018.
  • G. Tsirimokou, C. Psychalinos and A. S. Elwakil, "Electronically tunable fully integrated fractional-order resonator," IEEE Trans. Circuits & Syst.-II, vol. 65, no. 2, pp. 166-170, 2018.
  • A. S. Elwakil, B. J. Maundy, M. ElAmien and L. Belostotski, "A four-quadrant current multiplier/divider cell with four transistors," Analog Integrated Circuits and Signal Processing, vol. 95, no. 1, pp. 173-179, April, 2018.
  • M. B. ElAmein, A. S. Elwakil and B. J. Maundy, "Wide range grounded nonlinear transconductor and its application as a frequency doubler," Int. J. Electronics Letters, vol. 6, no. 2, pp. 214-219,  2018.
    • P. Bertsias, C. Psychalinos, A. S. Elwakil and A. G. Radwan, "High-frequency capacitorless fractional-order CPE and FI emulator," Circuits Systems and Signal Processing, vol. 37, no. 7, pp. 2694-2713, 2018. 
    • B. J. Maundy, A. S. Elwakil and C. Psychalinos, "Simple MOS-based circuit designed to show pinched hysteresis behavior," Int. J. Circuit Theory & Applications, Wiley, vol. 46, no. 5, pp. 1123-1128, 2018.
    • A. Al-Ali,  A. S. Elwakil,  B. J. Maundy and T. J. Freeborn, "Extraction of phase information from magnitude-only bioimpedance measurements using a modified Kramers-Kronig transform," Circuits Systems and Signal Processing, vol. 37, no. 8, pp. 3635-3650, August, 2018.

    • A. Abdelaty, A. S. Elwakil, A. G. Radwan, B. Maundy and C. Psychalinos, "Approximation of the fractional-order Laplacian as a weighted sum of first-order high-pass filters," IEEE Trans. Circuits & Syst.-II,  vol. 65, no. 8, pp. 1114-1118, Aug. 2018.

    • T. Bonny and A. S. Elwakil, "FPGA realizations of high speed switching-type chaotic oscillators using compact VHDL codes," Nonlinear Dynamics, vol. 93, no. 2, pp. 819-833, July, 2018.

    • A. Allagui, A. S. Elwakil, M. Fouda and A. G. Radwan, "Capacitive behavior and stored energy in supercapacitors at power line frequencies," J. Power Sources, vol. 390, pp. 142-147, June 2018.

    • A. Roja, A. Allagui, A. S. Elwakil and H. Alawadhi, "True random bit generators based on current time series of contact glow discharge electrolysis," J. Applied Physics, vol. 123, no. 20, pp. 203301, 2018.

    • C. Vastarouchas, I. Dimeas, C. Psychalinos and A. S. Elwakil, "Fractional-order integrated circuits in control applications and biological modeling," Chapter 6 in Fractional Order Systems (Eds. A. Azar, A. Radwan and S. Vaidyanathan), Elsevier, pp. 163-204, (doi.org/10.1016/B978-0-12-816152-4.00006-6), 2018

    • S. Kapoulea, C. Psychalinos and A. S. Elwakil, "Minimization of spread of time-constants and scaling factors in fractional-order differentiator and integrator realizations," Circuits Systems and Signal Processing, Springer, vol. 37, 5647–5663, 2018.

    • A. Allagui,  T. J Freeborn, A. S. Elwakil, M.  E. Fouda, B. J. Maundy, A. G. Radwan,  Z. Said, and  M. A. Abdelkareem, "Review of  fractional-order electrical characterization of supercapacitors, J. Power Sources, vol. 400, no. 8, pp. 457-467, 2018.

    • M. I. Hussain, A. El-Keblawy and A. S. Elwakil, "Aluminum influence on Calotropis procera seedling growth, nutrient accumulation and electrochemical attributes," Flora - Morphology Distribution Functional Ecology of Plants, vol. 248, pp. 34-42, 2018.

    • A. Allagui, A. S. Elwakil, Z. Said, M. Abdelkareem and D. Zhang, "Band-pass filter and relaxation oscillator using electric double-layer capacitor,"  ChemElectroChem, Wiley, vol. 5,  no. 23, pp. 3793-3798, Dec. 2018.

    •  United States Provisional Patent Application,   62/656,088,  BIO-IMPEDANCE ANALYZER, Inventors:  Abdulwadood Abdullah Al-Ali et al.


    2017


    • B. J. Maundy, S. Ozoguz, A. S. Elwakil and S. Gift, "The common-base differential amplifier and applications revisited," Microelectronics J., vol. 63, pp. 8-19, May 2017.
    • A. Allagui, A. S. Elwakil and T. J. Freeborn, "Supercapacitor reciprocity and response to linear current and voltage ramps," Electrochimica Acta, vol. 258, pp. 1081-1085, 2017.
    • G. Tsirimokou, C. Psychalinos, A. S. Elwakil and K. N. Salama, "Experimental behavior evaluation of series and parallel connected constant phase elements," Int. J. Electronics and Communications (AEUE), vol. 74, pp. 5-12, April 2017.
    • A. S. Elwakil, B. J. Maundy and C. Psychalinos, "On the pinched hysteresis behavior in a state-controlled resistor," Int. J. Electronics and Communications (AEUE), vol. 74, pp. 171-175, 2017.
    • G. Tsirimokou, C. Psychalinos and A. S. Elwakil, Design of CMOS Analog Integrated Fractional-Order Circuits: Applications in Medicine and Biology, Springer, 111 pages, ISBN 978-3-319-55632-1, (DOI: 10.1007/978-3-319-55633-8), 2017.
    • A. S. Elwakil, A. Agambayev, A. Allagui and K. N. Salama, "Experimental demonstration of fractional-order oscillators of orders 2.6 and 2.7," Chaos Solitons & Fractals, vol. 96, pp. 160-164, March 2017.
    • M. Fouda, A. G. Radwan and A. S. Elwakil, Memristor and Inverse Memristor: Modeling, Implementation and Experiments, Chapter 15 in Advances in Memristors, Memristive Devices and Systems (Eds. S. Vaidyanathan and C. Volos),  Studies in Computational Intelligence Series, Springer Verlag, Germany, pp. 371-392, 2017.
    • I. Dimeas, G. Tsirimokou, C. Psychalinos and A. S. Elwakil, "Experimental verification of fractional-order filters using a reconfigurable fractional-order impedance emulator," J. Circuits Systems and Computers, vol. 16, no. 9, pp. 1750142, 2017. 
    • A. S. Elwakil, A. G. Radwan, T. J. Freeborn, A. Allagui, B. J. Maundy and M. Fouda, "Low-voltage commercial super-capacitor response to periodic linear-with-time current excitation: A case study," IET Circuits Devices & Syst., vol. 11, no. 3, pp. 189-195, 2017.
    • G. Tsirimokou, C. Psychalinos and A. S. Elwakil, "Fractional-order electronically controlled generalized filters," Int. J. Circuit Theory & Applications, Wiley, vol. 45, no. 5, pp. 595-612, May 2017.
    • A. S. Elwakil, A. Allagui, T. J. Freeborn and B. J. Maundy, "Further experimental evidence of the fractional-order energy equation in supercapacitors," Int. J. Electronics and Communications (AEUE), vol. 78, pp. 209-212, August, 2017.
    • B. J. Maundy, A. S. Elwakil, S. Ozoguz and H. Yildiz, "Minimal two-transistor multifunction filter design," Int. J. Circuit Theory & Applications, Wiley, vol. 45, pp. 1449-1466, Nov. 2017.
    • T. J. Freeborn, A. S. Elwakil and B. J. Maundy, "Variability of Cole-model bioimpedance parameters using magnitude-only measurements of apples from a two-electrode configuration," Int. J. Food Properties, vol. 20, no. sup1, pp. S507-S519, Taylor & Francis, (
      • DOI:/10.1080/10942912.2017.1300810), 2017.
    • A. Allagui, J. M. Ashraf, M. Khalil, M. Abdelkareem, A. S. Elwakil and H. Alawadhi, "All solid-state double-layer capacitors using binderless reduced graphene oxide thin films prepared by bipolar electrochemistry," ChemElectroChem, Wiley, vol. 4, no. 8, pp. 2084-2090, August, 2017.

    • A. AboBaker, L. Said, A. Madian, A. S. Elwakil and A. G. Radwan, "Experimental comparison of integer/fractional-order electrical models of plant tissues," Int. J. Electronics and Communications (AEUE), vol. 80, pp. 1-9, Oct. 2017.
    • P. Bertsias, C. Psychalinos, A. S. Elwakil and B. J. Maundy, "Current-mode capacitorless integrators and differentiators for implementing emulators of fractional-order elements," Int. J. Electronics and Communications (AEUE), vol. 80, no. 10, pp. 94-103, 2017.
    • B. J. Maundy, A. S. Elwakil and C. Psychalinos, "CMOS realization of all positive pinched hysteresis loops," Complexity, article 7863095, (DOI:10.1155/2017/7863095), 2017.
    • C. Psychalinos, A. S. Elwakil, A. Allagui and A. Tepljakov, "Special issue on recent advances in the design and applications of fractional-order circuits and systems," Int. J. Electronics and Communications (AEUE), vol. 81, pp. 132-135, Nov. 2017.
    • B. J. Maundy, A. S. Elwakil and A. Elamien, "Oscillator with tunable phase capability," Electronics Letters, vol. 53, no. 23, pp. 1516-1518, Nov. 2017.
    • A. Agambayev, S. Patole, M. Farhat, A. S. Elwakil, H. Bagci and K. N. Salama, "Tunable ferroelectric fractional-order capacitors," ChemElectroChem, Wiley, vol. 4, no. 11, pp. 2807-2813, Nov. 2017. (DOI: 10.1002/celc.201700663).
    • A. Allagui, Z. Said, M. A. Abdelkareem, A. S. Elwakil, M. Yang and H. Alawadhi, "DC and AC performance of graphite films supercapacitors prepared by contact glow discharge electrolysis," J. Electrochemical Society, vol. 164, no. 12, pp. A2539-A2546, DOI: 10.1149/2.1161712jes, 2017.

    2016


    • A. S. Elwakil and B. J. Maundy, "Calculating output impedance in linear networks without source or load disconnect: The instantaneous output impedance," Int. J. Circuit Theory & Applications, Wiley, vol. 44, no. 1, pp. 98-108, 2016.
    • A. Allagui, M. Abdelkareem, H. Alawadhi and A. S. Elwakil, "Reduced graphene oxide thin film on conductive substrates by bipolar electrochemistry," Scientific Reports, Nature, 6, 21281, 2016.
    • G. Tsirimokou, C. Psychalinos and A. S. Elwakil, "Switched-capacitor fractional-step Butterworth filter design," Circuits Systems and Signal Processing, Springer, vol. 35, no. 4, pp. 1377-1393, 2016.
    • T. J. Freeborn, A. S. Elwakil and B. J. Maundy, "Approximating fractional-order inverse Chebyshev lowpass filters," Circuits Systems and Signal Processing, Springer, vol. 35, no. 6, pp. 1973-1982, 2016.
    • A. S. Elwakil,  A. Allagui, B. J. Maundy and C. Psychalinos, "Low frequency oscillator using a super-capacitor," Int. J. Electronics and Communications (AEU), vol. 70, no. 7, pp. 970-973, 2016.
    • C. Psychalinos, A. S. Elwakil, A. G. Radwan and K. Biswas, "Guest Editorial: Fractional-Order Circuits and Systems: Theory, Design, and Applications,"  Circuits Systems and Signal Processing, Springer, vol. 35, no. 6, pp. 1807-1813, 2016.
    • P.  Ahmadi, B. Maundy, A. S. Elwakil, L. Belostotski and A. Madanayake, “A new 2nd–order allpass filter in 130nm CMOS,” IEEE Trans. Circuits & Syst.-II, vol. 63, no.3, pp. 249-253, March, 2016.
    • T. J. Freeborn, A. S. Elwakil and B. Maundy, "Compact wide frequency range fractional-order models of human body impedance against contact currents," Mathematical Problems in Engineering, Special Issue on Theory and Applications of Fractional Order Systems, vol. 2016, Article ID 4967937, DOI:10.1155/2016/4967937.
    • A. S. Elwakil and B. J. Maundy, "Indirect realization of the imaginary resistor jR," Circuits Systems and Signal Processing, Springer, vol. 35, no. 7, pp. 2610-2615, 2016.
    • M. E. Fouda, A. S. Elwakil, A. G. Radwan and B. J. Maundy, "Fractional-order two-port networks," Mathematical Problems in Engineering, Special Issue on Theory and Applications of Fractional Order Systems, vol. 2016, Article ID 5976301, DOI:10.1155/2016/5976301.
    • A. Allagui, A. Roja, T. Bonny, A. S. Elwakil and M. Abdelkareem, "Nonlinear time-series analysis of current signal in cathodic contact glow discharge electrolysis," J. Applied Physics, 119 203303, 2016.
    • B. Maundy, A. S. Elwakil and S. Gift, “On a class of cross coupled fully differential filters,” Int. J. Circuit Theory & Applications, Wiley, vol. 44, pp. 1425-1436, July 2016.
    • C. Psychalinos, A. S. Elwakil, B. Maundy and A. Allagui, "Analysis and realization of a switched fractional-order-capacitor integrator," Int. J. Circuit Theory & Applications, Wiley, vol. 44, no. 11, pp. 2035-2040, 2016.
    • M. Fouda, A. S. Elwakil, A. G. Radwan and A. Allagui, "Power and energy analysis of fractional-order electrical energy storage devices," Energy, vol. 111, pp. 785-792, Sept. 2016.
    • G. Tsirimokou, C. Psychalinos, A. S. Elwakil  and K. N. Salama "Experimental verification of on chip CMOS fractional-order capacitor emulators," Electronics Letters, vol. 52, pp. 1298-1300, July 2016.
    • G. Tsirimokou, C. Psychalinos, T. J. Freeborn and A. S. Elwakil, "Emulation of current excited fractional-order capacitors and inductors using OTA topologies," Microelectronics J., vol. 55, pp. 70-81, Sept. 2016.
    • A. Allagui, A. S. Elwakil, B. Maundy and T. J. Freeborn, “Spectral capacitance of series and parallel combinations of super-capacitors,” ChemElectroChem, Wiley,  vol. 3, no. 9, pp. 1429-1436, Sept. 2016.
    • A. G. Radwan, B. J. Maundy and A. S. Elwakil, "Fractional-order oscillators," Chapter 3 in Oscillator Circuits, Frontiers in Design, Analysis and Applications, Editor Yoshifumi Nishio, pp. 25-49, IET, Dec. 2016.
    • A. Allagui, A. S. Elwakil, T. J. Freeborn and B. J. Maundy, "Reevaluation of performance of electric double-layer capacitors from constant current charge/discharge and cyclic voltammetry," Scientific Reports, Nature, 6:38568, Dec. 2016. (DOI: 10.1038/srep38568).

    2015


    • A. Allagui and A. S. Elwakil, "On the N-shaped conductance and hysteretic behavior of contact glow discharge electrolysis," Electrochimica Acta, Elsevier, vol. 168, pp. 173-177, 2015.
    • A. S. Elwakil and B. J. Maundy, "Second order bandstop and bandpass filters using transformers," Microelectronics J., Elsevier, vol. 46, no. 8, pp. 690-697, 2015.
    • T. J. Freeborn, A. S. Elwakil and B. J. Maundy, "Fractional-order models of supercapacitors, batteries and fuel cells: A survey," Materials for Renewable and Sustainable Energy, Springer, vol. 4, no. 3, pp. 1-7, 2015.
    • M. Fouda, A. S. Elwakil and A. G. Radwan, "Pinched hysteresis with inverse-memristor frequency characteristics in some nonlinear circuit elements," Microelectronics J., Elsevier, vol. 46, no. 9, pp. 834-838, 2015.
    • G. Tsirimokou, C. Psychalinos, A. S. Elwakil and A. Allagui, “Simple non-impedance-based measuring technique for supercapacitors,” Electronics Letters, vol. 51, no. 21, pp. 1699-1701, 2015.
    • B. Maundy, A. S. Elwakil and A. Allagui, "Extracting the parameters of the single-dispersion Cole bioimpedance model using a magnitude-only method," Computers and Electronics in Agriculture, vol. 119, pp. 153-157, 2015.
    • G. Tsirimokou, C. Psychalinos and A. S. Elwakil, "Emulation of a constant phase element using operational transconductance amplifiers," Analog Integrated Circuits & Signal Processing, Springer, vol. 85, (3), pp. 413-423, Dec. 2015.

     

    2014

     

    • A. S. Elwakil and B. J. Maundy, "Mapping of circuit variables into two-port network variables in basic amplifier structures: identifying new topologies," Int. J. Circuit Theory & Applications, vol. 42, no. 11, pp. 1203-1208, 2014.
    • A. S. Elwakil, "Clock-driven chaotic pulse-width generators: An overview and demonstration of power supply attack," Int. J. Bifurcation & Chaos, vol. 24, no. 6, pp. 1450079-1450086, June 2014.
    • A. S. Elwakil and B. J. Maundy, "Single transistor active filters: What is possible and what is not," IEEE Trans. Circuits & Syst.-I, vol. 61, no. 9, pp. 2517-2524, Sept. 2014.
    • T. J. Freeborn, B. J. Maundy and A. S. Elwakil, "Extracting the parameters of the double-dispersion Cole bioimpedance model without direct impedance measurement," Medical & Biological Engineering & Computing, Springer, vol. 52, no. 9, pp. 749-758, 2014.
    • H. Yu, A. S. Elwakil, L. Reyashko, Y. Wang and G. Chen, Guest Editorial, Special Issue on Chaos-Fractals Theories and Applications, Mathematical Problems in Engineering, (http://dx.doi.org/10.1155/2014/567281), 2014.
    • T. J. Freeborn, B. J. Maundy and A. S. Elwakil, "Approximated fractional-order Chebychev lowpass filters," Mathematical Problems in Engineering, (http://dx.doi.org/10.1155/2014/832468), 2014.
    • H. Yildiz, A. Toker, A. S. Elwakil and S. Ozoguz,  "MOS-only allpass filters with extended operating frequency range,"Analog Integrated Circuits & Signal Processing, Springer, vol. 81, no. 1, pp. 17-22, 2014.

     

    2013

     

    • T. J. Freeborn, B. J. Maundy and A. S. Elwakil, Fractional Step Analog Filter Design, Book Chapter in `Analog/RF and Mixed Signal Circuit Systematic Design`, Chapter 11, pp. 243-267, Springer, 2013. 
    • A. S. Elwakil, A. Fouda and A. G. Radwan, "A simple model of double-loop hysteresis behavior in memristive elements", IEEE Trans. Circuits & Syst.-II, vol. 60, pp. 487-491, August 2013.
    • T. J. Freeborn, B. Maundy and A. S. Elwakil, "Measurement of supercapacitor fractional-order model parameters from voltage-excited step response," IEEE J. Emerging and Selected Topics in Circuits & Systems, vol. 3, pp. 367-376, Sept. 2013.
    • T. J. Freeborn, B. J. Maundy and A. S. Elwakil, "Cole impedance extractions from the step-response of a current excited fruit sample," Computers and Electronics in Agriculture, Elsevier, vol. 98, pp. 100-108, 2013.
    • A. S. Elwakil, B. J. Maundy, L. Fortuna and G. Chen, Guest Editorial, Special Issue on Fractional-Order Circuits and Systems, IEEE J. Emerging and Selected Topics in Circuits and Systems, vol. 3, no. 3, Sept. 2013.

     

    2012

     

    • B. J. Maundy and A. S. Elwakil, "Extracting single dispersion Cole-Cole impedance model parameters using an integrator setup," Analog Integrated Circuits & Signal Processing, Springer, vol. 71, no. 1, pp. 107-110, 2012.
    • B. J. Maundy, A. S. Elwakil and S. Gift, "On the realization of multi-phase oscillators using fractional-order allpass filters," Circuits Syst. & Signal Processing, Springer, vol. 31, pp. 3-17, Feb. 2012.
    • A. G. Radwan and A. S. Elwakil, "An expression for the voltage response of a current-excited fractance device based on fractional-order trigonometric identities," Int. J. Circuit Theory & Applications, vol. 40, pp. 533-538, May 2012.
    • T. J. Freeborn, B. Maundy and A. S. Elwakil, "Least squares estimation technique of Cole-Cole parameters from step response," Electronics Letters, vol. 48, pp. 752-754, June 2012.
    • P. Ahmadi, B. J. Maundy, A. S. Elwakil and L. Belostotski "High quality factor asymmetric-slope band-pass filters: A fractional-order capacitor approach," IET Circuits Devices & Syst., vol. 6, pp. 141-210, April 2012.
    • T. J. Freeborn, B. J. Maundy and A. S. Elwakil, "Fractional-step Tow-Thomas Biquad filters," IEICE Nonlinear Theory and its Applications NOLTA, vol. 3, no. 3, pp. 357-374, 2012.

     

    2011

     

    • B. J. Maundy, A. S. Elwakil and T. Freeborn, "On the practical realization of higher-order filters with fractional stepping," Signal Processing, Elsevier, vol. 91, pp. 484-491, 2011.
    • A. S. Elwakil and M. Al-Ridhawi, "All possible second-order four-impedance two-stage Colpitts oscillators," IET Circuits Devices & Syst. vol. 5, pp. 196-202, May 2011.
    • A. S. Elwakil, "Ring oscillator structures with explicitly separated nonlinearity," Int. J. Circuit Theory & Applications, vol. 39, pp. 1079-1086, Oct. 2011.
    • T. J. Freeborn, B. J. Maundy and A. S. Elwakil, "Numerical extraction of Cole-Cole impedance parameters from step response," IEICE Nonlinear Theory and its Applications NOLTA, vol. 2, no. 4, pp. 548-561, Oct. 2011.

     

    2010

     

    • B. J. Maundy, A. S. Elwakil and S. Gift "On a multivibrator that employs a fractional capacitor," Analog Integrated Circuits & Signal Processing, vol. 62, pp. 99-103, 2010.
    • A. S. Elwakil and K. N. Salama, "Higher-dimensional models of cross-coupled oscillators and application to design," J. Circuits Systems & Computers, vol. 19, pp. 787-799, June 2010.
    • A. S. Elwakil, "A non-conservative model of second-order RC sinusoidal oscillators," J. Circuits Systems & Computers, vol. 19, pp. 871-877, June 2010.
    • A. S. Elwakil and M. A. Murtada "All possible canonical second-order three-impedance class-A and class-B oscillators" Electronics Letters, vol. 46, pp. 748-749, 2010.
    • A. S. Elwakil, S. Ozoguz and K. N. Salama, "Sinusoidal oscillators with lower gain requirements at higher frequencies based on an explicit tanh(x) nonlinearity," Int. J. Circuit Theory & Applications, vol. 38, pp. 747-760, Sept. 2010.
    • A. S. Elwakil, "Design of non-balanced cross-coupled oscillators with no matching requirements," IET Circuits Devices & Syst., vol. 4, pp. 365-373, Sept. 2010.
    • A. S. Elwakil and B. J. Maundy, "Extracting the Cole-Cole impedance model parameters without direct impedance measurement," Electronics Letters, vol. 46, pp. 1367-1368, Sept. 2010
    • T. J. Freeborn, B. J. Maundy and A. S. Elwakil, "Field programmable analog array implementation of fractional step filters," IET Circuits Devices & Syst., vol. 4, pp. 514-524, Nov. 2010.
    • A. S. Elwakil, "Fractional order circuits and systems: An emerging interdisciplinary research area," IEEE Circuits & Systems Magazine, vol. 10, no. 4, pp. 41-50, 2010.
    • A. Abid, Q. Nasir and A. S. Elwakil, "Implementation of an encrypted wireless communication system using nested chaotic maps," Int. J. Bifurcation & Chaos, vol. 20, pp. 4087-4096, Dec. 2010.
    • A. S. Elwakil and B. J. Maundy, "On the two-port network analysis of common amplifier topologies," Int. J. Circuit Theory & Applications, vol. 38, pp. 1087-1100, Dec. 2010.
    • A. S. Elwakil, "Motivating two-port network analysis through elementary and advanced examples," Int. J. Electrical Engineering Education, vol. 47, pp. 404-415, Oct. 2010.

     

    2009

     

    • A. G. Radwan, A. S. Elwakil and A. M. Soliman "On the generalization of second-order filters to the fractional-order domain," J. Circuits Systems & Computers, vol. 18, pp. 361-386, April 2009.
    • A. S. Elwakil and K. N. Salama, "On the nonlinear modeling of ring oscillators," J. Circuits Systems & Computers, vol. 18, pp. 681-696, June 2009.
    • A. G. Radwan, A. M. Soliman and A. S. Elwakil, "On the stability of linear systems with fractional-order elements," Chaos Solitons & Fractals, vol. 40, pp. 2317-2328, June 2009.
    • A. S. Elwakil, "On the two-port network classification of Colpitts oscillators," IET Circuits Devices & Syst., vol. 3, no. 5, pp. 223-232, Oct. 2009.

     

    2007-2008

     

    • A. G. Radwan, A. M. Soliman and A. S. Elwakil, "1-D digitally-controlled multi-scroll chaos generator," Int. J. Bifurcation & Chaos, vol. 17, pp. 227-242, Jan. 2007.
    • A. G. Radwan, A. M. Soliman and A. S. Elwakil, "Fractional-order sinusoidal oscillators: Four practical circuit design examples," Int. J. Circuit Theory & Applications, vol. 36, pp. 473-492, June 2008.
    • A. S. Elwakil and S. Ozoguz, "A system and circuit for generating multi-butterflies," Int. J. Bifurcation & Chaos, vol. 18, pp. 841-844, March 2008.
    • A. G. Radwan, A. S. Elwakil and A. M. Soliman "First order filters generalized to the fractional domain," J. Circuits Systems & Computers, vol. 17, pp. 55-66, Feb. 2008.
    • A. G. Radwan, A. S. Elwakil and A. M. Soliman, "Fractional-order sinusoidal oscillators: Design procedure and practical examples," IEEE Trans. Circuits & Syst.-I, vol. 55, pp. 2051-2063, Aug. 2008.
    • A. S. Elwakil and A. M. Elkhouly "A study of equilibrium points and stability in a nonlinear model of a phase-compensated operational amplifier," Circuits Syst. & Signal Processing, Springer, vol. 27, pp. 781-798, Oct. 2008.

     

    2005-2006

     

    • A. S. Elwakil, "A generic model for voltage-controlled second-order RC sinusoidal oscillators," J. Circuits Syst. & Computers, vol. 14, pp. 297-305, April 2005.
    • S. Ozoguz, T. Abdelrahman and A. S. Elwakil, "Novel approximate square-root domain all-pass filter with application to multiphase oscillators," Analog Integrated Circuits & Signal Processing, vol. 46, no. 3, pp. 297-301, 2006.
    • A. S. Elwakil, "Explaining Hysteresis in Electronic Circuits," Int. J. Electrical Engineering Education, vol. 43, pp. 252-260, July 2006.
    • A. S. Elwakil, "Explaining and eliminating latchup in a classical Wien oscillator via nonlinear design," Analog Integrated Circuits & Signal Processing, vol. 48, pp. 239-245, Sept. 2006.
    • A. S. Elwakil and S. Ozoguz, "On the generation of higher-order chaotic oscillators via passive coupling of two identical or nonidentical sinusoidal oscillators," IEEE Trans. Circuits & Syst.-I, vol. 53, pp. 1521-1532, July 2006.
    • A. S. Elwakil and S. Ozoguz, "Multi-scroll chaotic attractors: The nonautonomous approach," IEEE Trans. Circuits & Syst.-II, vol. 53, pp. 862-866, Sept. 2006.
    • S. Ozoguz, A. S. Elwakil and S. Ergun "Cross-coupled chaotic oscillators and application to random bit generation," IEE Circuits Devices & Syst., vol. 153, pp. 506-510, Oct. 2006.

     

    2003-2004

     

    • A. S. Elwakil and S. Ozoguz, "Chaos in a pulse-excited resonator with self feedback," Electronics Letters, vol. 39, pp. 831-833, 2003.
    • A. S. Elwakil, S. Ozoguz and M. P. Kennedy, "A four wing butterfly chaotic attractor fom a fully autonomous system," Int. J. Bifurcation & Chaos, vol. 13, pp. 3093-3098, 2003.
    • W. M. Halalu and A. S. Elwakil, "Research-oriented junior/senior design projects: An analog circuit-design example," IEEE Trans. Education, vol. 47, pp. 93-99, Feb. 2004.
    • A. S. Elwakil, "Integrator-based circuit-independent chaotic oscillator structure," Chaos, vol. 14, pp. 364-369, 2004.
    • S. Ozoguz and A. S. Elwakil, "On the realization of circuit-independent nonautonomous pulse-excited chaotic oscillator circuits," IEEE Trans. Circuits & Syst.-II, vol. 51, pp. 552-556, 2004.

     

    2001-2002

     

    • A. S. Elwakil and M. P. Kennedy, "Construction of classes of circuit-independent chaotic oscillators using passive-only nonlinear devices," IEEE Trans. Circuits & Syst.-I, vol. 48, pp. 289-307, 2001. (fast moving front in the Field of Mathematics, January 2007 by Thomson ScienceWatch)
    • W. Ahmed, R. Elkhazali and A. S. Elwakil, "Fractional-order Wien-bridge oscillator," Electronics Letters, vol. 37, pp. 1110-1112, 2001.
    • A. S. Elwakil, "Nonautonomous pulse-driven chaotic oscillator based on Chua's circuit," Microelectronics J., vol. 33, pp. 479-486, 2002.
    • A. S. Elwakil, S. Ozoguz and M. P. Kennedy, "Creation of a complex butterfly attractor using a novel Lorenz-type system," IEEE Trans. Circuits & Syst.-I, vol. 49, pp. 527-530, 2002.
    • A. S. Elwakil and W. M. Ahmed, "On the necessary and sufficient conditions for latch-up in sinusoidal oscillators," Int. J. Electronics, vol. 89, pp. 197-206, 2002.
    • S. Ozoguz, A. S. Elwakil and K. N. Salama, "N-scroll chaos generator using nonlinear transconductor," Electronics Letters, vol. 38, pp. 685-686, 2002.
    • S. Ozoguz, A. S. Elwakil and M. P. Kennedy, "Experimental verification of the butterfly attractor in a modified Lorenz system," Int. J. Bifurcation & Chaos, vol.12, pp. 1627-1633, 2002.
    • A. S. Elwakil, K. N. Salama and M. P. Kennedy, "An equation for generating chaos and its monolithic implementation," Int. J. Bifurcation & Chaos, vol. 12, pp. 2885-2895, 2002.
    • A. S. Elwakil, and M. P. Kennedy, (2002) 'Design methodology for autonomous chaotic oscillators' In: Chen, G. and Ueta, T (eds). Chaos in Circuits and Systems. London: Routledge (Book Chapter) DOI:10.1067/123456.

     

     

    1999-2000

     

    • A. S. Elwakil and A. M. Soliman, "Wien oscillators using current conveyors," Computers & Electrical Engineering, Elsevier, vol. 25, pp. 45-55, 1999.
    • A. S. Elwakil and A. M. Soliman, "Mathematical models of the Twin-T, Wien-bridge and family of minimum component electronic chaos generators with demonstrative recurrence plots," Chaos Solitons & Fractals, vol. 10, pp. 1399-1411, 1999.
    • A. S. Elwakil and A. M. Soliman, "Current conveyor chaos generators," IEEE Trans. Circuits & Syst.-I, vol. 46, pp. 393-398, 1999.
    • S. A. Mahmoud, A. S. Elwakil and A. M. Soliman, "CMOS current feedback op amp-based chaos generators using novel active nonlinear voltage-controlled resistors with odd symmetrical characteristics," Int. J. Electronics, vol. 86, pp. 1441-1451, 1999.
    • A. M. Eltawil and A. S. Elwakil, "Low voltage chaotic oscillator with an approximate cubic nonlinearity," Int. J. Electr. Commun. (AEÜ), vol. 53, pp. 158-160, 1999.
    • A. S. Elwakil and M. P. Kennedy, "A family of Colpitts-like chaotic oscillators," J. Franklin Institute, vol. 336, pp. 687-700, 1999.
    • A. S. Elwakil and M. P. Kennedy, "Inductorless hyperchaos generator," Microelectronics J., vol. 30, pp. 739-743, 1999.
    • A. S. Elwakil and M. P. Kennedy, "Three-phase oscillator modified for chaos," Microelectronics J., vol. 30, pp. 863-867, 1999.
    • A. S. Elwakil and M. P. Kennedy, "Chaotic oscillators derived from Saito's double-screw hysteresis oscillator," IEICE Trans. Fundamentals, vol. E82, pp. 1769-1775, 1999.
    • A. S. Elwakil and M. P. Kennedy, "Chaotic oscillator configuration using a frequency-dependent negative resistor," J. Circuits Systems & Computers, vol. 9, pp. 229-242, 1999.
    • A. S. Elwakil and M. P. Kennedy, "Improved implementation of Chua's chaotic oscillator using the current feedback op amp," IEEE Trans. Circuits & Syst.-I, vol. 47, pp. 76-79, 2000.
    • A. S. Elwakil and M. P. Kennedy, "Chaotic oscillator configuration using a frequency-dependent negative resistor," Int. J. circuit Theory & Applications, vol. 28, pp. 69-76, 2000.
    • A. S. Elwakil and M. P. Kennedy, "Novel chaotic oscillator configuration using a diode-inductor composite," Int. J. Electronics, vol. 87, pp. 397-406, 2000.
    • A. S. Elwakil and M. P. Kennedy, "Chua's circuit decomposition: A systematic design approach for autonomous chaotic oscillators," J. Franklin Institute, vol. 337, pp. 251-265, 2000.
    • A. S. Elwakil and M. P. Kennedy, "A low-voltage low-power chaotic oscillator derived from a relaxation oscillator," Microelectronics J., vol. 31, pp. 459-468, 2000.
    • A. S. Elwakil and M. P. Kennedy, "A semi-systematic procedure for producing chaos from sinusoidal oscillators using diode-inductor and FET-capacitor composites," IEEE Trans. Circuits & Syst.-I, vol. 47, pp. 582-590, 2000.
    • A. S. Elwakil and M. P. Kennedy, "Chaotic oscillators derived from sinusoidal oscillators using the current feedback op amp," Analog Integrated Circuits and Signal Processing, vol. 24, pp. 239-252, 2000.
    • A. S. Elwakil, "A low-voltage relaxation oscillator," Electronics Letters, vol. 36, pp. 1256-1257, 2000.
    • A. S. Elwakil and M. P. Kennedy, "Systematic realization of a class of hysteresis chaotic oscillators," Int. J. Circuit Theory & Applications, vol. 28, pp. 319-334, 2000.
    • A. S. Elwakil and M. P. Kennedy, "Generic RC realizations of Chua's circuit," Int. J. Bifurcation & Chaos, vol. 10, pp. 1981-1985, 2000.

     

     

    1997-1998

     

    • A. S. Elwakil and A. M. Soliman, "A family of Wien-type oscillators modified for chaos," Int. J. Circuit Theory & Applications, vol. 25, pp. 561-579, 1997.
    • A. S. Elwakil and A. M. Soliman, "Current mode chaos generator," Electronics Letters, vol. 33, pp. 1661-1662, 1997.
    • A. S. Elwakil and A. M. Soliman, "Chaos from a family of minimum component oscillators," Chaos Solitons & Fractals, vol. 8, pp. 335-356, 1997.
    • A. S. Elwakil and A. M. Soliman, "Chaos from two modified oscillator configurations using a current feedback op amp" Chaos Solitons & Fractals, vol. 8, pp. 389-410, 1997.
    • A. M. Soliman and A. S. Elwakil, "A new generalized oscillator," Electronic Engineering, vol. 70, pp. 22,29, 1998.
    • A. S. Elwakil and A. M. Soliman, "Two Twin-T based op amp oscillators modified for chaos" J. Franklin Institute, vol. 335B, pp. 771-787, 1998.
    • A. S. Elwakil, "Systematic realization of low-frequency oscillators using composite passive-active resistors," IEEE Trans. Instrum. Meas., vol. 47, pp. 584-586, 1998.
    • A. S. Elwakil and M. P. Kennedy, "High frequency Wien-type chaotic oscillator," Electronics Letters, vol. 34, pp. 1161-1162, 1998.
    • A. S. Elwakil and A. M. Soliman, "Two modified for chaos negative impedance converter op amp oscillators with symmetrical and antisymmetrical nonlinearities," Int. J. Bifurcation and chaos, vol. 8, pp. 1335-1346, 1998.

    Subpages (1): Conferences