Journals/Books/Book Chapters


highlights


Scientific Reports, (IF 4.61), Nature:  2   

J. Power Sources, (IF 6.86), Elsevier: 2      

Energy, (IF 5.58), Elsevier: 1      

Electrochimica Acta, (IF 5.12), Elsevier:  4          

Complexity (IF 4.62), Wiley:  2

ChemElectroChem, (IF 4.46), Wiley:  4

Nonlinear Dynamics, (IF 3.46), Springer: 3

Applied Soft Computing, (IF 4.00), Elsevier: 1


IEEE Circuits & Systems Magazine, (IF 3.93), IEEE:  1

J. Electrochemical Society, (IF 3.307), ECS: 1

J. Franklin Institute, (IF 3.043), Elsevier:  3

Signal Processing, (IF 3.47), Elsevier:  1


Journal of Applied Physics (IF 2.17), AIP:  2

Measurement, Elsevier (IF 2.6): 1

Chaos: An Interdisciplinary Journal of Nonlinear Science, (IF 2.312), AIP:  1

IEEE J. Emerging and Selected Topics in Circuits & Systems, (IF 2.542), IEEE: 2

IEEE Trans. Circuits & Systems-I-Fundamental Circuit Theory, (IF 2.407), IEEE: 8

IEEE Trans. Instrumentation & Measurement, (IF 2.456), IEEE:  1

Computers and Electronics in Agriculture, (IF 2.502), Elsevier:  2

Int. J. Electronics & Communications (AEUE), (IF 2.15), Elsevier:  8


Medical & Biological Engineering & Computing, (IF 1.916), Springer:  1

IEEE Trans. Circuits & Systems-II- Express Briefs, (IF 2.45), IEEE:  8

IEEE Trans. Education, (IF 1.73), IEEE:  1

Circuits Systems & Signal Processing, (IF 1.99), Springer:  15

Chaos Solitons & Fractals, (IF 1.6), Elsevier: 7

Int. J. Circuit Theory & Applications, (IF 1.571), Wiley:  16

Morphology, Distribution, Functional Ecology of Plants (FLORA), Elsevier, (IF 1.46)

Int. J. Bifurcation & Chaos, (IF 1.33), World Scientific:  10

Microelectronics Journal, (IF 1.16), Elsevier: 9

Int. J. of Food Properties, (IF 1.43), Taylor & Francis: 1

Electronics Letters, (IF 1.12), IET:  12

Circuits Devices & Systems, (IF 1.22), IET:  7


Mathematical Problems in Engineering, (IF 0.82) Hindawi: 5

Computers & Electrical Engineering, (IF 0.53), Elsevier: 1

Int. J. Electronics, (0.73), Taylor & Francis: 4

Int. J. Electrical Engineering Education, (IF 0.375), Manchester Univ. Press: 2

Analog Integrated Circuits and Signal Processing, (0.592), Springer: 8

Materials for Renewable and Sustainable Energy, Springer: 1

J. Circuits Systems & Computers, (IF 0.304), World Scientific: 10

Nonlinear Theory and its Applications NOLTA, IEICE-Japan: 2

IEICE Trans. Fundamentals of Electronics, IEICE-Japan: 1

Book Chapters: 5

Books: 2

 
2019

2017





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






CMOS fractional-order capacitor emulator chip (2016)


CMOS fractional-order capacitor emulator chip


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, Springer (doi.org/10.1007/s00034-018-0968-4).

  • 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, Springer (10.1007/s11071-018-4703-2).

  • 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, (10.1002/cta.2598), 2019.

  • B. J. Maundy, A. S. Elwakil and S. Gift, "Enhancing the improved Howland circuit," Int. J. Circuit Theory & Applications, (10.1002/cta.2605), 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 10.1109/TCSI.2019.2900944, 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, (accepted).

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



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.
    • A. G. Radwan and A. S. Elwakil, "Transient-time fractional-space trigonometry and application", T. Huang et al. (Eds.), Springer Lecture Notes in Computer Science, vol. 7663, pp. 40--47. Springer-Heidelberg, 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 interdiscplinary 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.
    • A. S. Elwakil and S. Ozoguz, "Pulse-excited RC nonautonomous chaotic oscillator structures," Int. J. Bifurcation & Chaos, vol. 15, pp. 2257-2261, 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