Godfred Bonsu| Circuit and Signal Processing | Best Researcher Award

Published on by Young Scientists Awards

Mr. Godfred Bonsu | Circuit and Signal Processing | Best Researcher Award

Iowa State University | United States

Godfred Osei Bonsu is a highly motivated and accomplished electrical engineer currently pursuing a Ph.D. in Electrical Engineering at Iowa State University, where he maintains a perfect GPA and focuses on analog and mixed-signal VLSI circuit design, data converters, microwave engineering, and data analytics. His research centers on ultra-small area, low-cost DAC design, analog fault detection, and multisite analog and mixed-signal testing, where he develops innovative methodologies to detect soft faults, improve INL and DNL, and decompose cross-wafer die-specification variations. Godfred has contributed to multiple high-impact publications, including works on redundancy-interpolated DACs, statistical analysis of nonlinearity errors, and high-resolution waveform generation, accepted at prestigious conferences such as the International Test Conference and IEEE International Midwest Symposium on Circuits and Systems. Before his doctoral studies, Godfred earned a B.Sc. in Electrical and Electronic Engineering from Kwame Nkrumah University of Science and Technology, graduating with distinction and receiving the Tullow Oil Scholarship for academic excellence. He has also been recognized on the Provost’s List multiple times and was part of the winning team of the National Science and Maths Quiz. His technical skills include Python, MATLAB, Cadence Virtuoso, and INNOVUS, applied in designing operational amplifiers, bandgap voltage references, current mirrors, and efficient data converter architectures. Godfred combines his research expertise with hands-on teaching experience, having served as a teaching assistant at KNUST for courses including power electronics, electric drives, and synchronous machines. Additionally, he has reached thousands of students worldwide as an online tutor, providing high-quality lessons in linear electronic circuits, power generation, and applied electricity. With a strong foundation in research, teaching, and innovation, Godfred is dedicated to advancing the field of electrical engineering through cutting-edge circuit design, rigorous testing methodologies, and impactful knowledge dissemination.

Profile: Orcid

Featured Publications

  • Bonsu, G., Tamakloe, K., Bruce, I., Nti Darko, E., & Chen, D. (2025). Redundancy-interpolated three-segment DAC with on-chip digital calibration for improved static linearity. Paper accepted at International Test Conference.

  • Nti-Darko, E., Karimpour, S., Bruce, I., Bonsu, G., & Chen, D. (2025). Ultra-pure high-resolution waveform generation using low-cost data converters with dithering. Paper accepted at International Test Conference.

  • Bonsu, G., Bruce, I., Nti-Darko, E., Tamakloe, K., & Chen, D. (2025). Statistical analysis of the nonlinearity errors of unary and binary-weighted DACs. Manuscript submitted to International Test Conference.

  • Bonsu, G., Bruce, I., Nti-Darko, E., Tamakloe, K., & Chen, D. (2025). A three-segment small area interpolating DAC with redundancy-based calibration for high linearity. Paper accepted at IEEE International Midwest Symposium on Circuits and Systems.

 

Mohammad Hejri | Power Electronics | Best Researcher Award

Published on by Young Scientists Awards

Dr. Mohammad Hejri | Air Quality | Best Researcher Award

Dr at Sahand University of Technology Iran

Mohammad Hejri is an accomplished Associate Professor at Sahand University of Technology, Iran, specializing in Electrical Engineering. He holds a Ph.D. from Sharif University of Technology and the University of Cagliari, Italy, focusing on hybrid modeling and control of power electronics converters. With extensive academic achievements including top rankings in academic exams and prestigious awards, Hejri’s research spans optimal control, adaptive systems, and advanced power electronics. He has held visiting positions at University of Cagliari, Italy, and KTH-Royal Institute of Technology, Sweden. Hejri’s expertise lies in nonlinear control, neural networks, and electric machines, contributing significantly to both academia and industry.

profile:

scopus

🎓Education:

Ph.D. in Electrical Engineering (Double Title) Sharif University of Technology, Tehran, Iran (2005-2010) University of Cagliari, Cagliari, Italy (2005-2010) GPA: 17.37/20. M.Sc. in Electrical Engineering Sharif University of Technology, Tehran, Iran (2000-2002) GPA: 17.72/20. B.Sc. in Electrical Engineering Tabriz University, Tabriz, Iran (1996-2000) GPA: 16.97/20

🏆Honors and Awards:

Postdoctoral Research Fellow Position Best candidate among 43 applicants, School of Electrical Engineering, Royal Institute of Technology (KTH), 2011. Double Academic Title Co-tutorship program between Sharif University of Technology, Iran, and University of Cagliari, Italy, 2010 Ph.D. in Electrical Engineering from Sharif University of Technology Dottore di Ricerca in Ingegneria Elettronica e Informatica from University of Cagliari. Ph.D. Exam Entrance Ranked 1st among 30 students, Sharif University of Technology, Department of Electrical Engineering, 2005. M.Sc. Ranking Ranked 2nd among 25 students, Sharif University of Technology, Department of Electrical Engineering, 2002. B.Sc. Ranking Ranked 2nd among 140 students and 1st in power branch, Tabriz University, Department of Electrical Engineering, 2000. National University Entrance Exam Ranked 59th among 30,000 high school students, 1996

📜Thesis:

Ph.D.: Hybrid Modeling and Control of Power Electronics Converters, M.Sc.: Modeling and Control of Electric Arc Furnaces and Developing a New Model, B.Sc.: Modeling and Simulation of Induction Generators

Passed Courses in Ph.D.:

Optimal Control, Adaptive Control, Model Predictive Control, Multivariable Control, Nonlinear Control, Robust Control, Fuzzy Control, Neural Networks, System Identification, Optimization, Estimation Theory and Optimal Filters, Automata and Petri Nets (University of Cagliari), Advanced Power Electronics, Electric Machines Drives

Passed Courses in M.Sc.:

Power Electronics, Electric Machines Design, Reactive Power Control, Transients in Electric Power Systems, Generalized Theory of Electric Machines, Electric Power Systems Dynamic, Power Quality

🌍Visiting Positions:

University of Cagliari, Department of Electrical and Electronic Engineering, Italy (Sep. 2008 – Mar. 2009), KTH-Royal Institute of Technology, School of Electrical Engineering, Sweden (Feb. 2011 – Aug. 2012)

Publication:📝

  • Practical stabilisation of discrete-time switched nonlinear systems without a common equilibrium and using hybrid switching functions
    • Author: M. Hejri
    • Journal: International Journal of Control
    • Year: 2024
    • Status: Article in Press
    • Citations: 0

 

  • Correction to ‘Global Practical Stabilization of Discrete-time Switched Affine Systems via a General Quadratic Lyapunov Function and a Decentralized Ellipsoid’
    • Author: M. Hejri
    • Journal: IEEE/CAA Journal of Automatica Sinica
    • Year: 2022
    • Volume: 9 (12)
    • Pages: 2200
    • Citations: 1
    • Note: Open access

 

  • On the well-posedness, equivalency, and low-complexity translation techniques of discrete-time hybrid automaton and piecewise affine systems
    • Authors: M. Hejri, H. Mokhtari
    • Journal: Scientia Iranica
    • Year: 2022
    • Volume: 29 (2 D)
    • Pages: 693–726
    • Citations: 1
    • Note: Open access

 

  • Cascade Control System Design and Stability Analysis for a DC–DC Boost Converter with Proportional Integral and Sliding Mode Controllers and Using Singular Perturbation Theory
    • Authors: S. Azarastemal, M. Hejri
    • Journal: Iranian Journal of Science and Technology – Transactions of Electrical Engineering
    • Year: 2021
    • Volume: 45 (4)
    • Pages: 1445–1462
    • Citations: 6

 

  • On the global practical stabilization of discrete-time switched affine systems: Application to switching power converters
    • Author: M. Hejri
    • Journal: Scientia Iranica
    • Year: 2021
    • Volume: 28 (3)
    • Pages: 1621–1642
    • Citations: 2
    • Note: Open access

 

  • Global practical stabilization of discrete-time switched affine systems via switched Lyapunov functions and state-dependent switching functions
    • Author: M. Hejri
    • Journal: Scientia Iranica
    • Year: 2021
    • Volume: 28 (3)
    • Pages: 1606–1620
    • Citations: 2
    • Note: Open access

 

  • Global practical stabilization of discrete-time switched affine systems via a general quadratic Lyapunov function and a decentralized ellipsoid
    • Author: M. Hejri
    • Journal: IEEE/CAA Journal of Automatica Sinica
    • Year: 2021
    • Volume: 8 (11)
    • Pages: 1837–1851
    • Article Number: 9520833
    • Citations: 3

 

  • A fast and accurate global maximum power point tracking method for solar strings under partial shading conditions
    • Authors: S.M. Hashemzadeh, M. Hejri
    • Journal: Journal of Operation and Automation in Power Engineering
    • Year: 2020
    • Volume: 8 (3)
    • Pages: 245–256
    • Citations: 7