Prof. Ahmed S. Elwakil

All Stories

1. 
   Fractional-order electric double-layer capacitors with tunable low-frequency impedance phase angle and energy storage capabilities

   Article • Frontiers in Human Neuroscience, January 2020, American Institute of Physics

   Prof. Ahmed S. Elwakil, Dr Anis Allagui

2. 
   Reduced Active Components Count Electronically Adjustable Fractional-Order Controllers: Two Design Examples

   Article • Electronics, January 2020, MDPI AG

   Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

3. 
   Single transistor RC‐only second‐order allpass filters

   Article • International Journal of Circuit Theory and Applications, December 2019, Wiley

   Prof. Ahmed S. Elwakil

4. 
   Minimum MOS Transistor Count Fractional-Order Voltage-Mode and Current-Mode Filters

   Article • Technologies, December 2019, MDPI AG

   Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

5. 
   Quantification of memory in fractional-order capacitors

   Article • Journal of Physics D Applied Physics, October 2019, Institute of Physics Publishing

   Prof. Ahmed S. Elwakil

6. 
   Supercapacitor discharge under constant resistance, constant current and constant power loads

   Article • Journal of Power Sources, September 2019, Elsevier

   Prof. Ahmed S. Elwakil

7. 
   Commercial supercapacitor parameter estimation from step voltage excitation

   Article • International Journal of Circuit Theory and Applications, August 2019, Wiley

   Prof. Ahmed S. Elwakil, Mohammed Fouda

8. 
   Single transistor fractional-order filter using a multi-walled carbon nanotube device

   Article • Analog Integrated Circuits and Signal Processing, May 2019, Springer Science + Business Media

   Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

9. 
   One-terminal electronically controlled fractional-order capacitor and inductor emulator

   Article • AEU - International Journal of Electronics and Communications, May 2019, Elsevier

   Prof. Ahmed S. Elwakil

10. 
    Realizations of simple fractional-order capacitor emulators with electronically-tunable capacitance

    Article • Integration, May 2019, Elsevier

    Prof. Ahmed S. Elwakil

11. 
    Comprehensive comparison based on meta-heuristic algorithms for approximation of the fractional-order Laplacian s as a weighted sum of first-order high-pass filters

    Article • Microelectronics Journal, April 2019, Elsevier

    Prof. Ahmed S. Elwakil

12. 
    Enhancing the improved Howland circuit

    Article • International Journal of Circuit Theory and Applications, February 2019, Wiley

    Prof. Ahmed S. Elwakil

13. 
    Partial fraction expansion-based realizations of fractional-order differentiators and integrators using active filters

    Article • International Journal of Circuit Theory and Applications, February 2019, Wiley

    Prof. Ahmed S. Elwakil

14. 
    Parameter identification of fractional-order chaotic systems using different Meta-heuristic Optimization Algorithms

    Article • Nonlinear Dynamics, January 2019, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

15. 
    Novel two-measurements-only Cole-Cole bio-impedance parameters extraction technique

    Article • Measurement, January 2019, Elsevier

    Prof. Ahmed S. Elwakil

16. 
    Correlation Between the Theory of Lissajous Figures and the Generation of Pinched Hysteresis Loops in Nonlinear Circuits

    Article • IEEE Transactions on Circuits and Systems I Regular Papers, January 2019, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

17. 
    Design and Implementation of Portable Impedance Analyzers

    Article • January 2019, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

18. 
    Short-term memory in electric double-layer capacitors

    Article • Frontiers in Human Neuroscience, December 2018, American Institute of Physics

    Prof. Ahmed S. Elwakil, Dr Anis Allagui

19. 
    Single active element implementation of fractional-order differentiators and integrators

    Article • AEU - International Journal of Electronics and Communications, December 2018, Elsevier

    Prof. Ahmed S. Elwakil

20. 
    Chaotic Flower Pollination and Grey Wolf Algorithms for parameter extraction of bio-impedance models

    Article • Applied Soft Computing, November 2018, Elsevier

    Prof. Ahmed S. Elwakil

21. 
    Design and application examples of CMOS fractional-order differentiators and integrators

    Article • Microelectronics Journal, November 2018, Elsevier

    Prof. Ahmed S. Elwakil

22. 
    Rates and Effects of Local Minima on Fractional-Order Circuit Model Parameters Extracted from Supercapacitor Discharging Using Least Squares Optimization

    Article • Circuits Systems and Signal Processing, October 2018, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

23. 
    Review of fractional-order electrical characterization of supercapacitors

    Article • Journal of Power Sources, October 2018, Elsevier

    Prof. Ahmed S. Elwakil, Professor Ahmed G. Radwan

24. 
    Band-Pass Filter and Relaxation Oscillator using Electric Double-Layer Capacitor

    Article • ChemElectroChem, September 2018, Wiley

    Prof. Ahmed S. Elwakil

25. 
    A voltage tunable CMOS differential active resistor and its application

    Article • International Journal of Circuit Theory and Applications, September 2018, Wiley

    Prof. Ahmed S. Elwakil

26. 
    Aluminum influence on Calotropis procera seedling growth, nutrient accumulation and electrochemical attributes

    Article • Flora, August 2018, Elsevier

    Prof. Ahmed S. Elwakil

27. 
    Hardware Optimized FPGA Implementations of High-Speed True Random Bit Generators Based on Switching-Type Chaotic Oscillators

    Article • Circuits Systems and Signal Processing, July 2018, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

28. 
    Fractional-Order Multiphase Sinusoidal Oscillator Design Using Current-Mirrors

    Article • July 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

29. 
    Capacitive behavior and stored energy in supercapacitors at power line frequencies

    Article • Journal of Power Sources, June 2018, Elsevier

    Prof. Ahmed S. Elwakil, Professor Ahmed G. Radwan

30. 
    True random bit generators based on current time series of contact glow discharge electrolysis

    Article • Journal of Applied Physics, May 2018, American Institute of Physics

    Prof. Ahmed S. Elwakil

31. 
    Minimization of Spread of Time-Constants and Scaling Factors in Fractional-Order Differentiator and Integrator Realizations

    Article • Circuits Systems and Signal Processing, May 2018, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

32. 
    Fractional-Order Differentiators and Integrators with Reduced Circuit Complexity

    Article • May 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

33. 
    Supercapacitor Fractional-Order Model Discharging from Polynomial Time-Varying Currents

    Article • May 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

34. 
    Fractional-Order Model of a Commercial Ear Simulator

    Article • May 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

35. 
    Design and Implementation of a Bio-Impedance Analyzer Based on the Kramers-Kronig Transform

    Article • May 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

36. 
    FPGA realizations of high-speed switching-type chaotic oscillators using compact VHDL codes

    Article • Nonlinear Dynamics, March 2018, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

37. 
    Correction to: A four-quadrant current multiplier/divider cell with four transistors

    Article • Analog Integrated Circuits and Signal Processing, March 2018, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

38. 
    Simple MOS-based circuit designed to show pinched hysteresis behavior

    Article • International Journal of Circuit Theory and Applications, March 2018, Wiley

    Prof. Ahmed S. Elwakil

39. 
    A four-quadrant current multiplier/divider cell with four transistors

    Article • Analog Integrated Circuits and Signal Processing, February 2018, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

40. 
    Electronically Tunable Fully Integrated Fractional-Order Resonator

    Article • IEEE Transactions on Circuits & Systems II Express Briefs, February 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Professor khaled nabil salama, Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

41. 
    Transient and Steady-State Response of a Fractional-Order Dynamic PV Model Under Different Loads

    Article • Journal of Circuits System and Computers, February 2018, World Scientific Pub Co Pte Lt

    Prof. Ahmed S. Elwakil, Professor Ahmed G. Radwan

42. 
    Approximation of the Fractional-Order Laplacian sα as a Weighted Sum of First-Order High-Pass Filters

    Article • IEEE Transactions on Circuits & Systems II Express Briefs, January 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil, Professor Ahmed G. Radwan

43. 
    Fractional-Order Integrated Circuits in Control Applications and Biological Modeling

    Article • January 2018, Elsevier

    Prof. Ahmed S. Elwakil

44. 
    Contributors

    Article • January 2018, Elsevier

    Prof. Ahmed S. Elwakil

45. 
    Extraction of Phase Information from Magnitude-Only Bio-impedance Measurements Using a Modified Kramers–Kronig Transform

    Article • Circuits Systems and Signal Processing, December 2017, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

46. 
    Supercapacitor reciprocity and response to linear current and voltage ramps

    Article • Electrochimica Acta, December 2017, Elsevier

    Prof. Ahmed S. Elwakil

47. 
    Oscillator with tunable phase capability

    Article • Electronics Letters, November 2017, the Institution of Engineering and Technology (the IET)

    Prof. Ahmed S. Elwakil

48. 
    Special issue on recent advances in the design and applications of fractional-order circuits and systems

    Article • AEU - International Journal of Electronics and Communications, November 2017, Elsevier

    Prof. Ahmed S. Elwakil

49. 
    High-Frequency Capacitorless Fractional-Order CPE and FI Emulator

    Article • Circuits Systems and Signal Processing, October 2017, Springer Science + Business Media

    Professor Costas Psychalinos, Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

50. 
    Cover Feature: Ferroelectric Fractional-Order Capacitors (ChemElectroChem 11/2017)

    Article • ChemElectroChem, October 2017, Wiley

    Prof. Ahmed S. Elwakil

51. 
    Experimental comparison of integer/fractional-order electrical models of plant

    Article • AEU - International Journal of Electronics and Communications, October 2017, Elsevier

    Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

52. 
    Current-mode capacitorless integrators and differentiators for implementing emulators of fractional-order elements

    Article • AEU - International Journal of Electronics and Communications, October 2017, Elsevier

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

53. 
    Experimental Verification of Fractional-Order Filters Using a Reconfigurable Fractional-Order Impedance Emulator

    Article • Journal of Circuits System and Computers, September 2017, World Scientific Pub Co Pte Lt

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

54. 
    OTA-C realization of PIλ brake and throttle controllers for autonomous vehicles

    Article • September 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

55. 
    Design of a wood tissue impedance emulator in monolithic form

    Article • September 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

56. 
    Modelling supercapacitors leakage behaviour using a fractional-order model

    Article • September 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

57. 
    Analysis and experimental verification of a fractional-order Hartley oscillator

    Article • September 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

58. 
    Ferroelectric Fractional-Order Capacitors

    Article • ChemElectroChem, August 2017, Wiley

    Professor khaled nabil salama, Prof. Ahmed S. Elwakil

59. 
    Further experimental evidence of the fractional-order energy equation in supercapacitors

    Article • AEU - International Journal of Electronics and Communications, August 2017, Elsevier

    Prof. Ahmed S. Elwakil

60. 
    Synthesis and analysis of fully differential filters using two port networks

    Article • August 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

61. 
    Corrigendum: Reevaluation of Performance of Electric Double-layer Capacitors from Constant-current Charge/Discharge and Cyclic Voltammetry

    Article • Scientific Reports, June 2017, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

62. 
    Wide-range grounded non-linear transconductor and its application as a frequency doubler

    Article • International Journal of Electronics Letters, June 2017, Taylor & Francis

    Prof. Ahmed S. Elwakil

63. 
    Variability of Cole-model bioimpedance parameters using magnitude-only measurements of apples from a two-electrode configuration

    Article • International Journal of Food Properties, June 2017, Taylor & Francis

    Prof. Ahmed S. Elwakil

64. 
    All-Pass Filter Based Synthesis of Multifunctional Microwave Active Circuits

    Article • June 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

65. 
    All-Solid-State Double-Layer Capacitors Using Binderless Reduced Graphene Oxide Thin Films Prepared by Bipolar Electrochemistry

    Article • ChemElectroChem, June 2017, Wiley

    Prof. Ahmed S. Elwakil

66. 
    Low-voltage commercial super-capacitor response to periodic linear-with-time current excitation: a case study

    Article • IET Circuits Devices & Systems, May 2017, the Institution of Engineering and Technology (the IET)

    Prof. Ahmed S. Elwakil, Dr Anis Allagui, Professor Ahmed G. Radwan

67. 
    FPGA realization of Caputo and Grünwald-Letnikov operators

    Article • May 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

68. 
    Variability of supercapacitor fractional-order parameters extracted from discharging behavior using least squares optimization

    Article • May 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

69. 
    The common-base differential amplifier and applications revisited

    Article • Microelectronics Journal, May 2017, Elsevier

    Prof. Ahmed S. Elwakil

70. 
    Experimental behavior evaluation of series and parallel connected constant phase elements

    Article • AEU - International Journal of Electronics and Communications, April 2017, Elsevier

    Professor khaled nabil salama, Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

71. 
    On the pinched hysteresis behavior in a state-controlled resistor

    Article • AEU - International Journal of Electronics and Communications, April 2017, Elsevier

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

72. 
    Experimental demonstration of fractional-order oscillators of orders 2.6 and 2.7

    Article • Chaos Solitons & Fractals, March 2017, Elsevier

    Professor khaled nabil salama, Prof. Ahmed S. Elwakil

73. 
    Minimal two-transistor multifunction filter design

    Article • International Journal of Circuit Theory and Applications, February 2017, Wiley

    Prof. Ahmed S. Elwakil

74. 
    Applications of Fractional-Order Circuits

    Article • January 2017, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

75. 
    Introduction

    Article • January 2017, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

76. 
    Conclusions and Motivation for Future Work

    Article • January 2017, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

77. 
    Voltage-Mode Fractional-Order Filters

    Article • January 2017, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

78. 
    Procedure for Designing Fractional-Order Filters

    Article • January 2017, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

79. 
    Current-Mode Fractional-Order Filters

    Article • January 2017, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

80. 
    Emulation of Fractional-Order Capacitors (CPEs) and Inductors (FOIs)

    Article • January 2017, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

81. 
    Design of a Portable Low-Cost Impedance Analyzer

    Article • January 2017, Scitepress

    Prof. Ahmed S. Elwakil

82. 
    CMOS Realization of All-Positive Pinched Hysteresis Loops

    Article • Complexity, January 2017, Hindawi Publishing Corporation

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

83. 
    Memristor and Inverse Memristor: Modeling, Implementation and Experiments

    Article • January 2017, Springer Science + Business Media

    Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

84. 
    Design of CMOS Analog Integrated Fractional-Order Circuits

    Article • January 2017, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

85. 
    DC and AC Performance of Graphite Films Supercapacitors Prepared by Contact Glow Discharge Electrolysis

    Article • Journal of The Electrochemical Society, January 2017, The Electrochemical Society

    Prof. Ahmed S. Elwakil

86. 
    Reevaluation of Performance of Electric Double-layer Capacitors from Constant-current Charge/Discharge and Cyclic Voltammetry

    Article • Scientific Reports, December 2016, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

87. 
    Analysis of a rectifier circuit realized with a fractional-order capacitor

    Article • December 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

88. 
    Improved method to determine supercapacitor metrics from highpass filter response

    Article • December 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

89. 
    Electrode location impact on cole-impedance parameters using magnitude-only measurements

    Article • October 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

90. 
    Factors impacting accurate Cole-impedance extractions from magnitude-only measurements

    Article • October 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

91. 
    Fractional-order electronically controlled generalized filters

    Article • International Journal of Circuit Theory and Applications, September 2016, Wiley

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

92. 
    Power and energy analysis of fractional-order electrical energy storage devices

    Article • Energy, September 2016, Elsevier

    Prof. Ahmed S. Elwakil, Professor Ahmed G. Radwan

93. 
    Emulation of current excited fractional-order capacitors and inductors using OTA topologies

    Article • Microelectronics Journal, September 2016, Elsevier

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

94. 
    Experimental verification of on-chip CMOS fractional-order capacitor emulators

    Article • Electronics Letters, July 2016, the Institution of Engineering and Technology (the IET)

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil, Professor khaled nabil salama

95. 
    Spectral Capacitance of Series and Parallel Combinations of Supercapacitors

    Article • ChemElectroChem, July 2016, Wiley

    Prof. Ahmed S. Elwakil

96. 
    Aging effect on apples bio-impedance using AD5933

    Article • July 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

97. 
    A low frequency oscillator using a super-capacitor

    Article • AEU - International Journal of Electronics and Communications, July 2016, Elsevier

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

98. 
    Erratum: Erratum: Reduced Graphene Oxide Thin Film on Conductive Substrates by Bipolar Electrochemistry

    Article • Scientific Reports, June 2016, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

99. 
    Experimental verification of filters using fractional-order capacitor and inductor emulators

    Article • June 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

100. 
     A fractional-order dynamic PV model

     Article • June 2016, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Costas Psychalinos, Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

101. 
     Nonlinear time-series analysis of current signal in cathodic contact glow discharge electrolysis

     Article • Journal of Applied Physics, May 2016, American Institute of Physics

     Prof. Ahmed S. Elwakil

102. 
     Switched-current fractional-order filter designs

     Article • May 2016, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

103. 
     Determination of supercapacitor metrics using a magnitude-only method

     Article • May 2016, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

104. 
     Guest Editorial: Fractional-Order Circuits and Systems: Theory, Design, and Applications

     Article • Circuits Systems and Signal Processing, March 2016, Springer Science + Business Media

     Professor Costas Psychalinos, Prof. Ahmed S. Elwakil, Professor Ahmed G. Radwan

105. 
     A New Second-Order All-Pass Filter in 130-nm CMOS

     Article • IEEE Transactions on Circuits & Systems II Express Briefs, March 2016, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

106. 
     Reduced Graphene Oxide Thin Film on Conductive Substrates by Bipolar Electrochemistry

     Article • Scientific Reports, February 2016, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

107. 
     Analysis and realization of a switched fractional-order-capacitor integrator

     Article • International Journal of Circuit Theory and Applications, February 2016, Wiley

     Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

108. 
     Fractional-Order Two-Port Networks

     Article • Mathematical Problems in Engineering, January 2016, Hindawi Publishing Corporation

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

109. 
     Compact Wide Frequency Range Fractional-Order Models of Human Body Impedance against Contact Currents

     Article • Mathematical Problems in Engineering, January 2016, Hindawi Publishing Corporation

     Prof. Ahmed S. Elwakil

110. 
     Approximated Fractional-Order Inverse Chebyshev Lowpass Filters

     Article • Circuits Systems and Signal Processing, December 2015, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

111. 
     Series and parallel circuit models containing memristors and inverse memristors

     Article • December 2015, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil, Professor Ahmed G. Radwan

112. 
     Review of the missing mechanical element: Memdamper

     Article • December 2015, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

113. 
     Functional Units Based Model for Construction Organizations Performance

     Article • International Journal of Architecture Engineering and Construction, December 2015, International Association for Sustainable Development and Management

     Prof. Ahmed S. Elwakil

114. 
     Extracting the parameters of the single-dispersion Cole bioimpedance model using a magnitude-only method

     Article • Computers and Electronics in Agriculture, November 2015, Elsevier

     Prof. Ahmed S. Elwakil

115. 
     On a class of cross coupled fully differential filters

     Article • International Journal of Circuit Theory and Applications, October 2015, Wiley

     Prof. Ahmed S. Elwakil

116. 
     Simple non-impedance-based measuring technique for supercapacitors

     Article • Electronics Letters, October 2015, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

117. 
     Emulation of a constant phase element using operational transconductance amplifiers

     Article • Analog Integrated Circuits and Signal Processing, September 2015, Springer Science + Business Media

     Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

118. 
     Pinched hysteresis with inverse-memristor frequency characteristics in some nonlinear circuit elements

     Article • Microelectronics Journal, September 2015, Elsevier

     Prof. Ahmed S. Elwakil, Professor Ahmed G. Radwan

119. 
     Indirect Realization of the Imaginary Resistor jR

     Article • Circuits Systems and Signal Processing, August 2015, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

120. 
     Second order bandstop and bandpass filters using transformers

     Article • Microelectronics Journal, August 2015, Elsevier

     Prof. Ahmed S. Elwakil

121. 
     Switched-Capacitor Fractional-Step Butterworth Filter Design

     Article • Circuits Systems and Signal Processing, July 2015, Springer Science + Business Media

     Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

122. 
     Fractional-order models of supercapacitors, batteries and fuel cells: a survey

     Article • Materials for Renewable and Sustainable Energy, June 2015, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

123. 
     On the N-shaped Conductance and Hysteresis Behavior of Contact Glow Discharge Electrolysis

     Article • Electrochimica Acta, June 2015, Elsevier

     Prof. Ahmed S. Elwakil

124. 
     Digitally programmed fractional-order Chebyshev filters realizations using current-mirrors

     Article • May 2015, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

125. 
     Calculating output impedance in linear networks without source nulling or load disconnect: the instantaneous output impedance

     Article • International Journal of Circuit Theory and Applications, February 2015, Wiley

     Prof. Ahmed S. Elwakil

126. 
     Approximated Fractional Order Chebyshev Lowpass Filters

     Article • Mathematical Problems in Engineering, January 2015, Hindawi Publishing Corporation

     Prof. Ahmed S. Elwakil

127. 
     Single Transistor Active Filters: What is Possible and What is Not

     Article • IEEE Transactions on Circuits and Systems I Regular Papers, September 2014, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

128. 
     Extracting the parameters of the double-dispersion Cole bioimpedance model from magnitude response measurements

     Article • Medical & Biological Engineering & Computing, July 2014, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

129. 
     Clock-Driven Chaotic Pulse-Width Generators: An Overview and Demonstration of Power Supply Attack

     Article • International Journal of Bifurcation and Chaos, June 2014, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

130. 
     MOS-only allpass filters with extended operating frequency range

     Article • Analog Integrated Circuits and Signal Processing, May 2014, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

131. 
     Chaos-Fractals Theories and Applications

     Article • Mathematical Problems in Engineering, January 2014, Hindawi Publishing Corporation

     Prof. Ahmed S. Elwakil

132. 
     MOS-only allpass filters modified for low operating frequency range

     Article • November 2013, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

133. 
     Cole impedance extractions from the step-response of a current excited fruit sample

     Article • Computers and Electronics in Agriculture, October 2013, Elsevier

     Prof. Ahmed S. Elwakil

134. 
     Guest Editorial Fractional-Order Circuits and Systems

     Article • IEEE Journal on Emerging and Selected Topics in Circuits and Systems, September 2013, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

135. 
     Measurement of Supercapacitor Fractional-Order Model Parameters From Voltage-Excited Step Response

     Article • IEEE Journal on Emerging and Selected Topics in Circuits and Systems, September 2013, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

136. 
     A Simple Model of Double-Loop Hysteresis Behavior in Memristive Elements

     Article • IEEE Transactions on Circuits & Systems II Express Briefs, August 2013, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

137. 
     Design of fractional notch filter with asymmetric slopes and large values of notch magnitude

     Article • August 2013, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

138. 
     Simplifying Cole-impedance extraction from the current-excited step response

     Article • August 2013, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

139. 
     Mapping of circuit variables into two-port network variables in basic amplifier structures: identifying new topologies

     Article • International Journal of Circuit Theory and Applications, May 2013, Wiley

     Prof. Ahmed S. Elwakil

140. 
     Accurate time domain extraction of supercapacitor fractional-order model parameters

     Article • May 2013, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

141. 
     Fractional Step Analog Filter Design

     Article • January 2013, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

142. 
     Fractional Resonance-BasedRLβCαFilters

     Article • Mathematical Problems in Engineering, January 2013, Hindawi Publishing Corporation

     Prof. Ahmed S. Elwakil

143. 
     Improved Cole-Cole parameter extraction from frequency response using least squares fitting

     Article • May 2012, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

144. 
     Transient-Time Fractional-Space Trigonometry and Application

     Article • January 2012, Springer Science + Business Media

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

145. 
     High-quality factor asymmetric-slope band-pass filters: a fractional-order capacitor approach

     Article • IET Circuits Devices & Systems, January 2012, the Institution of Engineering and Technology (the IET)

     Dr Leonid Belostotski, Prof. Ahmed S. Elwakil

146. 
     Fractional-step Tow-Thomas biquad filters

     Article • Nonlinear Theory and Its Applications IEICE, January 2012, Institute of Electronics, Information and Communications Engineers (IEICE)

     Prof. Ahmed S. Elwakil

147. 
     Least squares estimation technique of Cole-Cole parameters from step response

     Article • Electronics Letters, January 2012, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

148. 
     Extracting single dispersion Cole–Cole impedance model parameters using an integrator setup

     Article • Analog Integrated Circuits and Signal Processing, August 2011, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

149. 
     The generalized exponential function and fractional trigonometric identities

     Article • August 2011, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

150. 
     Band-pass filters with high quality factors and asymmetric-slope characteristics

     Article • August 2011, Institute of Electrical & Electronics Engineers (IEEE)

     Dr Leonid Belostotski, Prof. Ahmed S. Elwakil

151. 
     Experimental technique for estimating the dispersion coefficient of a constant phase element

     Article • August 2011, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

152. 
     On the practical realization of higher-order filters with fractional stepping

     Article • Signal Processing, March 2011, Elsevier

     Prof. Ahmed S. Elwakil

153. 
     An expression for the voltage response of a current-excited fractance device based on fractional-order trigonometric identities

     Article • International Journal of Circuit Theory and Applications, February 2011, Wiley

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

154. 
     Numerical extraction of Cole-Cole impedance parameters from step response

     Article • Nonlinear Theory and Its Applications IEICE, January 2011, Institute of Electronics, Information and Communications Engineers (IEICE)

     Prof. Ahmed S. Elwakil

155. 
     All possible second-order four-impedance two-stage Colpitts oscillators

     Article • IET Circuits Devices & Systems, January 2011, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

156. 
     On the Realization of Multiphase Oscillators Using Fractional-Order Allpass Filters

     Article • Circuits Systems and Signal Processing, December 2010, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

157. 
     IMPLEMENTATION OF AN ENCRYPTED WIRELESS COMMUNICATION SYSTEM USING NESTED CHAOTIC MAPS

     Article • International Journal of Bifurcation and Chaos, December 2010, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

158. 
     On the two-port network analysis of common amplifier topologies

     Article • International Journal of Circuit Theory and Applications, November 2010, Wiley

     Prof. Ahmed S. Elwakil

159. 
     Second order approximation of the fractional laplacian operator for equal-ripple response

     Article • August 2010, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

160. 
     Ring oscillator structures with explicitly separated nonlinearity

     Article • International Journal of Circuit Theory and Applications, June 2010, Wiley

     Prof. Ahmed S. Elwakil

161. 
     HIGHER DIMENSIONAL MODELS OF CROSS-COUPLED OSCILLATORS AND APPLICATION TO DESIGN

     Article • Journal of Circuits System and Computers, June 2010, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil, Professor khaled nabil salama

162. 
     A NON-CONSERVATIVE MODEL OF SECOND-ORDER RC SINUSOIDAL OSCILLATORS

     Article • Journal of Circuits System and Computers, June 2010, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

163. 
     Towards the realization of fractional step filters

     Article • May 2010, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

164. 
     Fractional-Order Circuits and Systems: An Emerging Interdisciplinary Research Area

     Article • IEEE Circuits and Systems Magazine, January 2010, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

165. 
     Extracting the Cole-Cole impedance model parameters without direct impedance measurement

     Article • Electronics Letters, January 2010, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

166. 
     All possible canonical second-order three-impedance class-A and class-B oscillators

     Article • Electronics Letters, January 2010, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

167. 
     Field programmable analogue array implementation of fractional step filters

     Article • IET Circuits Devices & Systems, January 2010, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

168. 
     Design of non-balanced cross-coupled oscillators with no matching requirements

     Article • IET Circuits Devices & Systems, January 2010, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

169. 
     On the two-port network classification of Colpitts oscillators

     Article • IET Circuits Devices & Systems, October 2009, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

170. 
     A low frequency oscillator structure

     Article • August 2009, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

171. 
     On a multivibrator that employs a fractional capacitor

     Article • Analog Integrated Circuits and Signal Processing, June 2009, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

172. 
     On the stability of linear systems with fractional-order elements

     Article • Chaos Solitons & Fractals, June 2009, Elsevier

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

173. 
     Implementation of a Chaotically Encrypted Wireless Communication System

     Article • June 2009, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

174. 
     ON THE NONLINEAR MODELING OF RING OSCILLATORS

     Article • Journal of Circuits System and Computers, June 2009, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil, Professor khaled nabil salama

175. 
     Sinusoidal oscillators with lower gain requirements at higher frequencies based on an explicit tanh(x) nonlinearity

     Article • International Journal of Circuit Theory and Applications, April 2009, Wiley

     Prof. Ahmed S. Elwakil, Professor khaled nabil salama

176. 
     ON THE GENERALIZATION OF SECOND-ORDER FILTERS TO THE FRACTIONAL-ORDER DOMAIN

     Article • Journal of Circuits System and Computers, April 2009, World Scientific Pub Co Pte Lt

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

177. 
     A Study of Equilibrium Points and Stability in a Nonlinear Model of a Phase-Compensated Operational Amplifier

     Article • Circuits Systems and Signal Processing, October 2008, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

178. 
     Fractional-order sinusoidal oscillators: Design procedure and practical examples

     Article • IEEE Transactions on Circuits and Systems I Regular Papers, August 2008, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

179. 
     Monitoring of global cerebral ischemia using instantaneous phase variation plots

     Article • August 2008, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

180. 
     Nonlinear models of some ring oscillators

     Article • June 2008, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil, Professor khaled nabil salama

181. 
     A SYSTEM AND CIRCUIT FOR GENERATING "MULTI-BUTTERFLIES"

     Article • International Journal of Bifurcation and Chaos, March 2008, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

182. 
     FIRST-ORDER FILTERS GENERALIZED TO THE FRACTIONAL DOMAIN

     Article • Journal of Circuits System and Computers, February 2008, World Scientific Pub Co Pte Lt

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

183. 
     Design equations for fractional-order sinusoidal oscillators: Four practical circuit examples

     Article • International Journal of Circuit Theory and Applications, January 2008, Wiley

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

184. 
     Design equations for fractional-order sinusoidal oscillators: Practical circuit examples

     Article • December 2007, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

185. 
     New squaring circuit with reduced sensitivity to element mismatches using differentially driven translinear cells

     Article • May 2007, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

186. 
     1-D DIGITALLY-CONTROLLED MULTISCROLL CHAOS GENERATOR

     Article • International Journal of Bifurcation and Chaos, January 2007, World Scientific Pub Co Pte Lt

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

187. 
     Explaining Hysteresis in Electronic Circuits: Robust Simulation and Design Examples

     Article • December 2006, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

188. 
     Multiscroll Chaotic Oscillators: The Nonautonomous Approach

     Article • IEEE Transactions on Circuits and Systems II Analog and Digital Signal Processing, September 2006, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

189. 
     Explaining Hysteresis in Electronic Circuits

     Article • International Journal of Electrical Engineering Education, July 2006, SAGE Publications

     Prof. Ahmed S. Elwakil

190. 
     On the generation of higher order chaotic oscillators via passive coupling of two identical or nonidentical sinusoidal oscillators

     Article • IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications, July 2006, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

191. 
     Explaining and eliminating latchup in a classical Wien oscillator via nonlinear design

     Article • Analog Integrated Circuits and Signal Processing, May 2006, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

192. 
     Novel Approximate Square-Root Domain All-Pass Filter with Application to Multiphase Oscillators

     Article • Analog Integrated Circuits and Signal Processing, March 2006, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

193. 
     Cross-coupled chaotic oscillators and application to random bit generation

     Article • IEE Proceedings - Circuits Devices and Systems, January 2006, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

194. 
     PULSE-EXCITED RC NONAUTONOMOUS CHAOTIC OSCILLATOR STRUCTURES

     Article • International Journal of Bifurcation and Chaos, July 2005, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

195. 
     A GENERIC MODEL FOR VOLTAGE-CONTROLLED SECOND-ORDER RC SINUSOIDAL OSCILLATORS

     Article • Journal of Circuits System and Computers, April 2005, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

196. 
     On the Realization of Circuit-Independent Nonautonomous Pulse-Excited Chaotic Oscillator Circuits

     Article • IEEE Transactions on Circuits and Systems II Analog and Digital Signal Processing, October 2004, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

197. 
     Integrator-based circuit-independent chaotic oscillator structure

     Article • Chaos An Interdisciplinary Journal of Nonlinear Science, June 2004, American Institute of Physics

     Prof. Ahmed S. Elwakil

198. 
     Research-Oriented Junior/Senior Design Projects: An Analog Circuit Design Example

     Article • IEEE Transactions on Education, February 2004, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

199. 
     A FOUR-WING BUTTERFLY ATTRACTOR FROM A FULLY AUTONOMOUS SYSTEM

     Article • International Journal of Bifurcation and Chaos, October 2003, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

200. 
     Chaos in pulse-excited resonator with self feedback

     Article • Electronics Letters, January 2003, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

201. 
     AN EQUATION FOR GENERATING CHAOS AND ITS MONOLITHIC IMPLEMENTATION

     Article • International Journal of Bifurcation and Chaos, December 2002, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil, Professor khaled nabil salama

202. 
     EXPERIMENTAL VERIFICATION OF THE BUTTERFLY ATTRACTOR IN A MODIFIED LORENZ SYSTEM

     Article • International Journal of Bifurcation and Chaos, July 2002, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

203. 
     Design Methodology for Autonomous Chaotic Oscillators

     Article • June 2002, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

204. 
     Nonautonomous pulse-driven chaotic oscillator based on Chua's circuit

     Article • Microelectronics Journal, May 2002, Elsevier

     Prof. Ahmed S. Elwakil

205. 
     Creation of a complex butterfly attractor using a novel Lorenz-Type system

     Article • IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications, April 2002, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

206. 
     On the necessary and sufficient conditions for latch-up in sinusoidal oscillators

     Article • International Journal of Electronics, March 2002, Taylor & Francis

     Prof. Ahmed S. Elwakil

207. 
     n-scroll chaos generator using nonlinear transconductor

     Article • Electronics Letters, January 2002, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil, Professor khaled nabil salama

208. 
     Construction of classes of circuit-independent chaotic oscillators using passive-only nonlinear devices

     Article • IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications, March 2001, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

209. 
     Fractional-order Wien-bridge oscillator

     Article • Electronics Letters, January 2001, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

210. 
     GENERIC RC REALIZATIONS OF CHUA'S CIRCUIT

     Article • International Journal of Bifurcation and Chaos, August 2000, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

211. 
     A low-voltage, low-power, chaotic oscillator, derived from a relaxation oscillator

     Article • Microelectronics Journal, June 2000, Elsevier

     Prof. Ahmed S. Elwakil

212. 
     GENERIC RC REALIZATIONS OF CHUA'S CIRCUIT

     Article • May 2000, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

213. 
     Novel chaotic oscillator configuration using a diode-inductor composite

     Article • International Journal of Electronics, April 2000, Taylor & Francis

     Prof. Ahmed S. Elwakil

214. 
     A semi-systematic procedure for producing chaos from sinusoidal oscillators using diode-inductor and FET-capacitor composites

     Article • IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications, April 2000, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

215. 
     Chua's circuit decomposition: a systematic design approach for chaotic oscillators

     Article • Journal of the Franklin Institute, March 2000, Elsevier

     Prof. Ahmed S. Elwakil

216. 
     Low-voltage relaxation oscillator

     Article • Electronics Letters, January 2000, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

217. 
     Improved implementation of Chua's chaotic oscillator using current feedback op amp

     Article • IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications, January 2000, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

218. 
     Chaotic oscillator configuration using a frequency dependent negative resistor

     Article • International Journal of Circuit Theory and Applications, January 2000, Wiley

     Prof. Ahmed S. Elwakil

219. 
     Systematic realization of a class of hysteresis chaotic oscillators

     Article • International Journal of Circuit Theory and Applications, January 2000, Wiley

     Prof. Ahmed S. Elwakil

220. 
     Article • Analog Integrated Circuits and Signal Processing, January 2000, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

221. 
     CMOS current feedback op amp-based chaos generators using novel active nonlinear voltage controlled resistors with odd symmetrical characteristics

     Article • International Journal of Electronics, December 1999, Taylor & Francis

     Prof. Ahmed S. Elwakil, Professor Soliman Mahmoud

222. 
     Three-phase oscillator modified for chaos

     Article • Microelectronics Journal, September 1999, Elsevier

     Prof. Ahmed S. Elwakil

223. 
     Inductorless hyperchaos generator

     Article • Microelectronics Journal, August 1999, Elsevier

     Prof. Ahmed S. Elwakil

224. 
     Mathematical Models of the Twin-T, Wien-bridgeand Family of Minimum Component Electronic ChaosGenerators with Demonstrative Recurrence Plots

     Article • Chaos Solitons & Fractals, August 1999, Elsevier

     Prof. Ahmed S. Elwakil

225. 
     CHAOTIC OSCILLATOR CONFIGURATION USING A FREQUENCY DEPENDENT NEGATIVE RESISTOR

     Article • Journal of Circuits System and Computers, June 1999, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

226. 
     A family of Colpitts-like chaotic oscillators

     Article • Journal of the Franklin Institute, May 1999, Elsevier

     Prof. Ahmed S. Elwakil

227. 
     Current conveyor chaos generators

     Article • IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications, March 1999, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

228. 
     Wien oscillators using current conveyors

     Article • Computers & Electrical Engineering, January 1999, Elsevier

     Prof. Ahmed S. Elwakil

229. 
     Two Modified for Chaos Negative Impedance Converter Op Amp Oscillators with Symmetrical and Antisymmetrical Nonlinearities

     Article • International Journal of Bifurcation and Chaos, June 1998, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

230. 
     Two Twin-T based op amp oscillators modified for chaos

     Article • Journal of the Franklin Institute, May 1998, Elsevier

     Prof. Ahmed S. Elwakil

231. 
     Systematic realization of low-frequency oscillators using composite passive-active resistors

     Article • IEEE Transactions on Instrumentation and Measurement, April 1998, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

232. 
     High frequency Wien-type chaotic oscillator

     Article • Electronics Letters, January 1998, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

233. 
     New chaos generators

     Article • Chaos Solitons & Fractals, December 1997, Elsevier

     Prof. Ahmed S. Elwakil

234. 
     A family of Wien-type oscillators modified for chaos

     Article • International Journal of Circuit Theory and Applications, November 1997, Wiley

     Prof. Ahmed S. Elwakil

235. 
     Chaos from a family of minimum-component oscillators

     Article • Chaos Solitons & Fractals, March 1997, Elsevier

     Prof. Ahmed S. Elwakil

236. 
     Chaos from two modified oscillator configurations using a current feedback op amp

     Article • Chaos Solitons & Fractals, March 1997, Elsevier

     Prof. Ahmed S. Elwakil

237. 
     Current mode chaos generator

     Article • Electronics Letters, January 1997, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

238. 
     2D scroll grid attractors from pulse-excited nonautonomous circuits

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

239. 
     Generation of n-scroll chaos using nonlinear transconductors

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

240. 
     Pulse-excited RC nonautonomous chaotic oscillator structures

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

241. 
     Nonautonomous pulse-driven chaotic oscillator based on Chua's circuit

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

242. 
     A new method for the realization of non-autonomous chaotic oscillators

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

243. 
     A system for chaos generation and its implementation in monolithic form

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

244. 
     High frequency RC chaos generator

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

245. 
     Chaotic oscillator configuration using a frequency dependent negative resistor

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

246. 
     An Integrated Circuit Chaotic Oscillator and Its Application for High Speed Random Bit Generation

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

247. 
     Fractional-order oscillators

     Article • the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil