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High-Bandwidth,Low-Power CMOS Transistor Based CAB for field programmable analog array

Computers, Materials & Continua 2023年第3期74卷 5885-5900页

作者： Ameen Bin Obadi Alaa El-Din Hussein Samir Salem Al-Bawri Kabir Hossain Abdullah Abdulhameed Muzammil Jusoh Thennarasan Sabapathy Ahmed Jamal Abdullah Al-Gburi Mahmoud A.Albreem Advanced Communication Engineering(ACE) Centre of ExcellenceUniversiti Malaysia Perlis(UniMAP)Faculty of Electronic Engineering TechnologyKangar01000Malaysia Electrical Engineering King Fahd University of Petroleum and MineralsDhahranEastern31261Saudi Arabia Space Science Centre Climate Change InstituteUniversiti Kebangsaan MalaysiaBangi43600Malaysia Department of Electronics&Communication Engineering Faculty of Engineering&PetroleumHadhramout UniversityAl-MukallaHadhramout50512Yemen Faculty of Engineering Norwegian University of Science and Technology(NTNU)GjovikN-2815Norway Faculty of Electronic Engineering Technology Universiti Malaysia Perlis(UniMAP)Kampus Alam UniMAP Pauh PutraArau02600Malaysia Department of General Educational Development Faculty of Science and Information Technology(FSIT)Daffodil International UniversityDhaka1207Bangladesh Department of Electronics and Computer Engineering(FKEKK) Center for Telecommunication Research and Innovation(CeTRI)Universiti Teknikal Malaysia Melaka(UTeM)Durian Tungal76100Malaysia Department of Electrical Engineering University of SharjahSharjah27272United Arab Emirates

This article presents an integrated current mode configurable analog block(CAB)system for field-programmable analog array(FPAA).The proposed architecture is based on the complementary metal-oxide semiconductor(CMOS)transistor level design where MOSFET transistors operating in the saturation region are *** proposed CAB architecture is designed to implement six of thewidely used current mode operations in analog processing systems:addition,subtraction,integration,multiplication,division,and pass *** functionality of the proposed CAB is demonstrated through these six operations,where each operation is chosen based on the user’s selection in the CAB interface *** architecture of the CAB system proposes an optimized way of designing and integrating only three functional cells with the interface circuitry to achieve the six ***,optimized programming and digital tuning circuitry are implemented in the architecture to control and interface with the functional ***,these designed programming and tuning circuitries play an essential role in optimizing the performance of the proposed *** of the proposed CMOS Transistor Based CAB system is carried out using Tanner EDA Tools in 0.35μm standard CMOS *** design uses a±1.5 V power supply and results in maximum 3 dB bandwidth of 34.9 MHz and an approximate size of 0.0537 *** demonstrates the advantages of the design over the current state-of-the-art designs presented for comparison in this ***,the proposed design has a clear aspect of simplicity,low power consumption,and high bandwidth operation,which makes it a suitable candidate for mobile telecommunications applications.

关键词： CMOS field programmable analog array configurable analog block current mode circuit

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Implementation of Various Chaotic Spiking Oscillators Based on field programmable analog array

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IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 2023年第11期E106A卷 1432-1435页

作者： Matsuoka, Yusuke Natl Inst Technol NIT Yonago Coll Dept Integrated Engn Electr & Elect Div Yonago 6838502 Japan

In this paper, a circuit based on a field programmable analog array (FPAA) is proposed for three types of chaotic spiking oscillator (CSO). The input/output conversion characteristics of a specific element in the FPAA can be defined by the user. By selecting the proper characteristics, three types of CSO are realized without changing the structure of the circuit itself. Chaotic attractors are observed in a hardware experiment. It is confirmed that the dynamics of the CSOs are consistent with numerical simulations.

关键词： programmable device field programmable analog array chaos oscillator

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Novel CCII-based field programmable analog array and its Application to a Sixth-Order Butterworth LPF

Novel CCII-based Field Programmable Analog Array and its App...

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作者： Mahmoud, S. A. Brno University of Technology

In this paper, a field programmable analog array (FPAA) is proposed. The proposed FPAA consists of seven configurable analog blocks (CABs) arranged in a hexagonal lattice such that the CABs are directly connected to each other. This structure improves the overall frequency response of the chip by decreasing the parasitic capacitances in the signal path. The CABS of the FPAA is based on a novel fully differential digitally programmable current conveyor (DPCCII). The programmability of the DPCCII is achieved using digitally controlled three-bit MOS ladder current division network. No extra biasing circuit is required to generate specific analog control voltage signals. The DPCCII has constant standby power consumption, offset voltage, bandwidth and harmonic distortions over all its programming range. A sixth-order Butterworth tunable LPF suitable for WLAN/WiMAX receivers is realized on the proposed FPAA. The filter power consumption is 5.4mW from 1V supply; it’s cutoff frequency is tuned from 5.2 MHz to 16.9 MHz. All the circuits are realized using 90nm CMOS technology from TSMC. All simulations are carried out using Cadence.

关键词： Current division network digitally programmable current conveyor field programmable analog array tunable WLAN/WiMAX receivers

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Implementation and Behavior of Basic Filters Involving the Delay Element e-τs

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CIRCUITS SYSTEMS AND SIGNAL PROCESSING 2025年第5期44卷 3659-3671页

作者： Nako, Julia Elwakil, Ahmed S. Psychalinos, Costas Univ Patras Dept Phys Elect Lab Rion 26504 Greece Univ Sharjah Dept Elect Engn POB 27272 Sharjah U Arab Emirates Univ Calgary Dept Elect & Software Engn Calgary AB Canada Nile Univ Nanoelect Integrated Syst Ctr NISC Giza Egypt

The gain and phase responses of the delay element e-tau s are related through a non-linear relation, unlike the conventional e-tau s delay element where the gain is constant over the entire frequency range. This makes this fractional-order element attractive for describing the dynamics of systems with dead-time zone. In this work, the transfer function of this element is approximated through a rational integer-order function resulting from a curve-fitting based method. The performed comparison with the literature shows that the curve-fitting based approximation method achieves errors in gain and phase less than 0.3dB and 2o, respectively, while the available method in the literature achieves 3.7dB and 8o, respectively. The behavior of some filters involving this delay element is evaluated and it is demonstrated that the implementation of these filters can be performed by the same circuit core, simply by adjusting the coefficients of the approximation transfer function. The findings of this work are supported by MATLAB simulation results and, also, by experimental results obtained through the utilization of a field programmable analog array device.

关键词： analog signal processing analog filters Fractional-order filters Time-delay filters field programmable analog array

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Non-integer-order exponential filters: definitions in the time-domain and frequency-domain

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NONLINEAR DYNAMICS 2025年 1-14页

作者： Nako, Julia Psychalinos, Costas Elwakil, Ahmed S. Univ Patras Dept Phys Elect Lab GR-26504 Rion Greece Univ Sharjah Dept Elect Engn POB 27272 Sharjah U Arab Emirates Univ Calgary Dept Elect & Software Engn Calgary AB T2N 1N4 Canada Nile Univ Nanoelect Integrated Syst Ctr NISC Giza 12677 Egypt

Integer and non-integer-order exponential filters defined in both the time and frequency-domains are investigated in this work. These filters are then approximated utilizing a curve-fitting method leading to a rational integer-order approximating transfer function. The accuracy of the approximation of the exponential filters is confirmed through experimental results obtained using a field programmable analog array device. A real life application example is also provided, where one of the presented filters is employed for denoising an electrocardiogram signal.

关键词： analog filters Gaussian filters Exponential filters Fractional-order filters Power-law filters Impulse response field programmable analog array

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analog filters based on the Mittag-Leffler functions

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SIGNAL PROCESSING 2025年 233卷

作者： Allagui, Anis Elwakil, Ahmed S. Nako, Julia Psychalinos, Costas Univ Sharjah Dept Sustainable & Renewable Energy Engn POB 27272 Sharjah U Arab Emirates Univ Sharjah Dept Elect & Comp Engn Miami FL 33174 USA Univ Sharjah Dept Elect Engn POB 27272 Sharjah U Arab Emirates Univ Calgary Dept Elect & Software Engn Calgary AB Canada Nile Univ Nanoelect Integrated Syst Ctr NISC Giza Egypt Univ Patras Dept Phys Elect Lab GR-26504 Patras Greece

We propose and study anew class of filters (named hereinafter the Mittag-Leffler filters) based on the MittagLeffler function E alpha,beta(z) in its single-parameter or double-parameter forms by transposing its argument to the frequency-domain;i.e. z = -s = -jco. A unique feature of these filters is that their impulse response is a Gaussian-like (delta-like) deformed and delayed impulse function for which we derive exact expressions using the H-Fox function. We also study the frequency response of this class of filters and obtain lower-order, realizable integer-order approximations of its transfer functions. A second-order curve-fitting approximation is then used to perform experimental results using a field programmable analog array platform to verify the theory.

关键词： analog signal processing Mittag-Leffler function Fractional-order filters Dirac delta function field programmable analog array

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Approximation of First-Order Complex Resonators in the Frequency-Domain

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IEEE ACCESS 2025年 13卷 54494-54503页

作者： Nako, Julia Tsirimokou, Georgia Psychalinos, Costas Elwakil, Ahmed S. Univ Patras Dept Phys Elect Lab Patras 26504 Greece Univ Ioannina Dept Comp Sci & Engn Ioannina 45110 Greece Univ Sharjah Dept Elect Engn Sharjah U Arab Emirates Univ Calgary Dept Elect & Software Engn Alberta AB T2N 1N4 Canada Nile Univ Nanoelect Integrated Syst Ctr NISC Giza 3242020 Egypt

A novel approach for implementing first-order complex filters without the requirement of two separate signal paths, for the real and imaginary parts of the transfer function, is introduced in this work. This is achieved by employing a curve-fitting based method to approximate both the gain and phase responses of the prototype complex filter. The resulting rational integer-order transfer function can be realized using conventional filter design techniques. The behavior of the proposed complex resonator configuration is evaluated through experimental results, derived using a field programmable analog array (FPAA) device. An application example is provided, in which the complex resonator is employed to extract vowels from the corresponding glottal pulse trains.

关键词： analog filters analog signal processing complex filters complex resonators formant filters speech signal processing field programmable analog array

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Reduced Complexity Approximation and Design of Gaussian Impulse Response Filters and Wavelets

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IEEE ACCESS 2024年 12卷 160064-160073页

作者： Nako, Julia Tsirimokou, Georgia Psychalinos, Costas Elwakil, Ahmed S. Maundy, Brent J. Bertsias, Panagiotis Univ Patras Dept Phys Elect Lab Patras 26504 Greece Univ Ioannina Dept Comp Sci & Engn Ioannina 45110 Greece Univ Sharjah Dept Elect Engn Sharjah U Arab Emirates Univ Calgary Dept Elect & Software Engn Calgary AB T2N 1N4 Canada Nile Univ Nanoelect Integrated Syst Ctr NISC Giza 12677 Egypt

A systematic method for realizing filters with a Gaussian impulse response is introduced in this work. For this purpose, the Laplace transform is used to obtain the transfer function which corresponds to the Gaussian impulse response. Since this transfer function has an exponential term, a rational integer- order approximating transfer function is derived by employing a curve-fitting based method applied on both gain and phase responses of the original transfer function. This concept is also applied on the derivatives of the Gaussian impulse response, leading to wavelet filter transfer functions. The findings in this work are supported by both simulation and experimental results using the Cadence IC design suite as well as a field programmable analog array (FPAA) platform.

关键词： Filters Transfer functions Time-domain analysis Time-frequency analysis Complexity theory Wavelet transforms Low-pass filters Frequency response Laplace equations field programmable analog arrays analog filters analog signal processing Gaussian filters operational transconductance amplifiers field programmable analog array

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Adjustable resonator and anti-resonator designs for speech signal processing

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AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS 2024年 183卷

作者： Nako, Julia Tsirimokou, Georgia Psychalinos, Costas Univ Patras Dept Phys Elect Lab GR-26504 Patras Greece Univ Ioannina Dept Comp Sci & Engn GR-45110 Ioannina Greece

Novel structures with adjustable characteristics, capable of performing the process where the vowel waveform is derived from a pulse train produced by the vibrating vocal folds and vice versa, are introduced in this work. Various design techniques are exploited to implement the required resonator and anti -resonator stages. The offered design flexibility and versatility are achieved through the employment of suitable active elements which offer electronically controlled characteristics in the resonator and anti -resonator stages, such as the Operational Transconductance Amplifiers, or through the employment of stages where their frequency behavior is digitally programmed, such as the Configurable analog Modules included in a field programmable analog array device. The provided post -layout simulation and experimental results confirm the correct operation of the introduced structures in both the frequency and time domains.

关键词： analog filters Inverse filters Formant filters Peak filters field programmable analog array Operational Transconductance Amplifiers Speech signal processing

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Complex-order controller design examples and their implementation

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INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS 2024年第1期52卷 473-482页

作者： Nako, Julia Psychalinos, Costas Elwakil, Ahmed S. Univ Patras Phys Dept Elect Lab Rion Greece Amer Univ Sharjah Dept Elect Engn Sharjah U Arab Emirates Univ Calgary Dept Elect & Software Engn Calgary AB Canada Nile Univ Nanoelect Integrated Syst Ctr NISC Cairo Egypt

A systematic method for approximating the complex-order Laplacian operator by realizable integer-order transfer functions is presented in this work. The realization is performed by a simple structure where only one active element is used. Thanks to the employment of complex-order impedances, both integrators and differentiators can be readily implemented by the same core simply by interchanging the associated impedance locations. The validity of the presented concept is verified through simulation and experimental results, using the OrCAD PSpice suite and a field programmable analog array device.

关键词： complex-order controllers complex-order differentiator complex-order impedance complex-order integrator curve fitting approximation field programmable analog array

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