Browsing by Author "Bhuyan, Muhibul Haque"

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A Comparative Study on various Recent Single-Phase Single-Switch Non-Isolated AC-DC SEPIC Configurations
(EEE-SEU, 2022-01-31) Ahmed, Istiak; Bhuyan, Muhibul Haque
In this comparative analysis-based research paper, five recent power electronic circuits of single-phase, non-isolated AC-to-DC SEPIC configurations are considered, such as, switched capacitor, modified, high-efficiency, input switched, and improved performance-based SEPIC circuits. The open-loop performance analyses were made among these five recent converter circuits. Before that, a good number of articles on power electronic converter circuits are studied and key performance parameters, for example, voltage gain, efficiency, power factor of the supply current signal, Total Harmonic Distortion, and the number of parts were identified. Then these are analyzed based on the variation of load resistance and duty cycles. The performance evaluation points out that the high-efficiency SEPIC circuit provides an impressive efficiency of over 99% within a wide range of load resistances or duty cycles. In terms of power factor, the modified SEPIC circuit demonstrates better results of over 0.98. The switched capacitor SEPIC circuit can provide the lowest THD among the five topologies.
A CRITICAL REVIEW ON OPEN LOOP ANALYSIS OF SINGLE-PHASE NON-ISOLATED AC-DC BUCK CONVERTERS
(EEE-SEU, 2021-01-31) Ahmed, Istiak; Bhuyan, Muhibul Haque
In this paper, we have reviewed a family of power electronic single-phase, non-isolated ac-dc buck converters based on the open-loop analysis. From the literature survey, we have found numerous types of ac-dc buck converter topologies. Among these, a few important topologies are discussed and compared with various parameters like voltage gain, efficiency, switching frequency, total harmonic distortion, and the number of component counts. The comparison shows that the Input switched buck converter maintains an impressive power factor of 0.97 under frequency variation. In terms of the Total Harmonic Distortion (THD) of input current, both the input switched buck converter and switched capacitor buck converter provide much fewer values of THD than the conventional buck converter over the variation of duty cycle and frequency .
A Modern Review of the Non-Invasive Continuous Blood Glucose Measuring Devices and Techniques for Remote Patient Monitoring System
(WASET, 2022-02-28) Bhuyan, Muhibul Haque
Diabetes disease that arises from the higher glucose level due to insulin shortage or insulin opposition in the human body has become a common disease in the world. No medicine can cure it completely. However, by taking medicine, maintaining diets, and having exercises regularly, a diabetes patient can keep his glucose level within the specified limits and in this way, he/she can lead a normal life like a healthy person. But to control glucose levels, a patient needs to monitor them regularly. Various techniques are being used over the last four decades. This modern review article aims to provide a comparative study report on various blood glucose monitoring techniques in a very concise and organized manner. The review mainly emphasizes working principles, cost, technology, sensors, measurement types, measurement accuracy, advantages, and disadvantages, etc. of various techniques and then compares among each other. Besides, the use of algorithms and simulators for the growth of this technology is also presented. Finally, current research trends of this measurement technology have also been discussed.
A Modern Review of the Spintronic Technology: Fundamentals, Materials, Devices, Circuits, Challenges, and Current Research Trends
(WASET, 2021-06-30) Bhuyan, Muhibul Haque
Spintronic, also termed spin electronics or spin transport electronics, is a kind of new technology, which exploits the two fundamental degrees of freedom- spin-state and charge-state of electrons to enhance the operational speed for the data storage and transfer efficiency of the device. Thus, it seems an encouraging technology to combat most of the prevailing complications in orthodox electron-based devices. This novel technology possesses the capacity to mix the semiconductor microelectronics and magnetic devices’ functionalities into one integrated circuit. Traditional semiconductor microelectronic devices use only the electronic charge to process the information based on binary numbers, 0 and 1. Due to the incessant shrinking of the transistor size, we are reaching the final limit of 1 nm or so. At this stage, the fabrication and other device operational processes will become challenging as the quantum effect comes into play. In this situation, we should find an alternative future technology, and spintronic may be such technology to transfer and store information. This review article provides a detailed discussion of the spintronic technology: fundamentals, materials, devices, circuits, challenges, and current research trends. At first, the fundamentals of spintronic technology are discussed. Then types, properties, and other issues of the spintronic materials are presented. After that, fabrication and working principles, as well as application areas and advantages/disadvantages of spintronic devices and circuits, are explained. Finally, the current challenges, current research areas, and prospects of spintronic technology are highlighted. This is a new paradigm of electronic cum magnetic devices built on the charge and spin of the electrons. Modern engineering and technological advances in search of new materials for this technology give us hope that this would be a very optimistic technology in the upcoming days.
A Multi-Functional Arduino-Based Autonomous Vehicle for Landmine and Gas Detection
(IEEE, 2025-05-29) Rahman, Md. Musfequr; Siddiqui, Md Absar; Erad, Md Jarif Rahman; Rahman, Taseen; Chowdhury, Nadman Ahmed; Bhuyan, Muhibul Haque
The use of complex and mobile robots is growing exponentially in numerous contexts, largely for dangerous zones such as military operations, industries, or emergencies. In this paper, we designed and developed an Arduino-based robot vehicle for gas and landmine detection to make things easy in places, such as military zones or disaster sites. This robot can navigate dangerous terrains independently by monitoring the real-time data of air gas and landmine alarms through gas sensors and metal detectors. Moreover, its ultra-sonic sensor function allows the robot vehicle to move ahead very conveniently. The system uses a GSM module to alert us of possible threats through SMS and calls. This innovative solution provides a practical and effective approach to the reverse logistics of each product.
A Novel Linearization Technique for RF Power Amplifiers Combining Predistortion and Feedforward Linearizers
(AIUB Journal of Science and Engineering (AJSE), 2025-08-31) Sheikh, Protik Parvez; Bhuyan, Muhibul Haque; Alam, Sadman Shahriar; Ali, M. Tanseer; Shufian, Abu
This paper presents a hybrid linearization technique for improving the performance of Class E radio frequency (RF) power amplifiers (PAs). The method combines feedforward and adaptive RF/digital predistortion to reduce nonlinear distortion without a significant reduction in power-added efficiency (PAE). The proposed approach achieves a reduction of 12.7% in harmonic distortion at 1.22 GHz. Simulation results, carried out using Agilent ADS, show improvements in third-order intermodulation distortion (IMD3), input third-order intercept point (IIP3), and output third-order intercept point (OIP3). Comparative analysis demonstrates that this technique provides superior linearity enhancement compared to conventional analog predistortion. While the results are simulation-based, this work highlights the trade-off between linearity and efficiency.
A Novel Linearization Technique for RF Power Amplifiers Combining Predistortion and Feedforward Linearizers
(Faculty of Science and Technology (FST) and Faculty of Engineering (FE), American International University-Bangladesh, 2026-04-30) Sheikh, Protik Parvez; Bhuyan, Muhibul Haque; Alam, Sadman Shahriar; Ali, M. Tanseer; Shufian, Abu
This paper presents a hybrid linearization technique for improving the performance of Class E radio frequency (RF) power amplifiers (PAs). The method combines feedforward and adaptive RF/digital predistortion to reduce nonlinear distortion without a significant reduction in power-added efficiency (PAE). The proposed approach achieves a reduction of 12.7% in harmonic distortion at 1.22 GHz. Simulation results, carried out using Agilent ADS, show improvements in third-order intermodulation distortion (IMD3), input third-order intercept point (IIP3), and output third-order intercept point (OIP3). Comparative analysis demonstrates that this technique provides superior linearity enhancement compared to conventional analog predistortion. While the results are simulation-based, this work highlights the trade-off between linearity and efficiency.
A Real-Time IoT-Enabled Automated Solar Panel Cleaning System with Dust Detection Employing Advanced Image Processing Technique
(IEEE, 2024-06-24) Karima, Nazmun Nahar; Saikat, Mahmudul Hasan; Molla, Md Sumon; Bhuyan, Muhibul Haque
An advanced image processing for an automated Internet of Things (IoT)-enabled solar panel cleaning system is presented in this paper as a novel solution. A camera is used to detect the solar panel’s dirtiness employing an advanced image processing technique using NVIDIA Jetson. Once the image of the panel is found dusty, the cleaning process is initiated by the microcontroller. The system takes images incessantly and real time images are used to enhance dust detection effectively thus empowering maintenance actions to be performed immediately. This ensures the maximum possible electrical output power. The cleaning mechanism employs a mechanical brush to run from one side to another side and back again driven by two servo motors. Once the surface is cleaned by the brush, the camera can detect it and stop the cleaning process. An app is used to get notifications via email messages through the internet to the user’s smartphone. As such increased energy output, lower maintenance costs, and enhanced system stability are possible to obtain. The suggested approach helps ensure that solar energy output is sustainable by reducing the need for manual intervention and optimizing cleaning schedules based on real panel conditions. This creative solution tackles the crucial issue of preserving the longevity and effectiveness of solar panels as the globe shifts to greener energy sources.
A RELATIVE COMPARISON AMONG RECENT TOPOLOGIES OF SINGLE-PHASE NON-ISOLATED AC-DC BUCK-BOOST CONVERTER BASED ON OPEN-LOOP PERFORMANCE ANALYSIS
(EEE-SEU, 2022-07-31) Ahmed, Istiak; Bhuyan, Muhibul Haque
In the present article, a family of power electronic single-phase, non-isolated ac-dc buck-boost converters based upon the open-loop performance analysis have been reviewed. In the literature, abundant kinds of ac-dc buck-boost converter topologies have been searched. Among them, a few important topologies are conversed here and matched with several parameters like voltage gain, efficiency, input power factor, total harmonic distortion, and the number of component counts with the variation of load resistance and duty cycles. The assessment indicates that the input switched and switched capacitor buck-boost converters maintain an impressive input power factor of 0.99 at some specific load or duty cycles. In terms of efficiency, the high-efficiency buck-boost converter can provide over 99% efficiency. The switched capacitor buck-boost converter can provide the Total Harmonic Distortion (THD) of input current less than unity.
A Review of Recent Research Works on Negative Capacitance Field Effect Transistor
(Southeast University, 2019-06-30) Bhuyan, Muhibul Haque
The size of CMOS technology is being continuously scaled down in the nano scale regime. But the Boltzmann’s electron distribution creates a major obstacle to it and causes to reach a limit, i.e., the sub-threshold slope value of 60mV/decade attainable at normal room temperature. Reduction of power consumption has become a critical challenge for computational circuits and thus restricts the processing speed of data rate. Negative capacitance transistor proposes to break this limit of SS further down. A Negative Capacitance Field Effect Transistor engages a ferroelectric material in the gate region of the device structure and thus provides an effect of negative capacitance. As such internal voltage amplification occurs and thereby reduces the sub-threshold slope. In this paper, construction and the physics based working theory behind the NCFET structures, motivation towards the research works on NCFET and their comparative attainment etc. will be discussed and reported elaborately.
A Review of the Fabrication Process of the Pocket Implanted MOSFET Structure
(Southeast University, 2020-06-30) Bhuyan, Muhibul Haque
The dimensions of the various types of Metal Oxide Semiconductor Field Effect Transistor (MOSFET) device structures are being shrunk continuously to accommodate more transistors inside a single chip. However, these shrinking entail several impacts on the device performance degradation and hence it has become cumbersome to operate the device properly at its various biasing conditions. To obtain the best performance from the shorter device, the modified device structure is being proposed or developed by the device design engineers. One such effort is to have the additional dopant atoms laterally at the channel region’s drain and/or source sides through the ion implantation process. This is known as pocket implantation and the new device structure thus obtained is called pocket implanted MOSFET. Due to this extra doping, the threshold voltage is increased rather than decreased as the channel length is reduced. This new effect is termed the Reverse Short Channel Effect or in short RSCE. However, the new device structure requires new fabrication processes. Therefore, in this paper, the formation processes of the pocket structure have been described in detail by studying the various literature. To fabricate the pocket implanted Metal Oxide Semiconductor Field Effect Transistor (MOSFET) structure, we require several fabrication steps, like, Chemical Vapor Deposition (CVD), Ion Implantation, Electron Beam Lithography (EBL), Rapid Thermal Annealing (RTA), Reactive Ion Etching (RIE), etc. All these steps are described herein brief so that a clear picture can be obtained about it The knowledge of these steps can be utilized to derive the various operational parameters, such as surface potential, threshold voltage incorporating bias and temperature effects, effective mobility model, subthreshold drain current, drain current flicker noise, etc. of the pocket implanted n-MOSFET device as well as their modeling and characterization.
A Semi-Analytical Drain Current Deflection Model for the Symmetric Pocket Implanted n-MOSFET Using Lorentz Force Analysis
(IJECEE, 2013-02-28) Bhuyan, Muhibul Haque; Ferdous, Fouzia; Khosru, Quazi Deen Mohd
This paper introduces the effect of the magnetic field upon the deflection of the subthreshold drain current of the symmetric pocket implanted n-MOSFET. The symmetric pocket implanted n-MOSFET’s surface potential, threshold voltage, electron mobility, and subthreshold drain current models are used to study the effect of magnetic field on the subthreshold drain current deflection in the inversion channel. Magnetic field strength is varied from ±200 mT to ±250 mT. Results verify the theoretical derivations. This model can be used if short channel n-MOSFETs are used to develop the Magnetic FET Sensors (MFS) that have many practical applications.
A Semi-Analytical Subthreshold Drain Current Deflection Model for the Asymmetric Pocket Implanted Nano Scale n-MOSFET
(The Institution of Engineers Bangladesh (IEB-EE), 2012-12-31) Bhuyan, Muhibul Haque; Khosru, Quazi Deen Mohd
This paper introduces the effect of the magnetic field on the subthreshold drain current of pocket implanted n-MOSFET. The pocket implanted n-MOSFET’s surface potential, threshold voltage, electron mobility, and subthreshold drain current models are used to study the effect of the magnetic field on the drain current deflection in the inversion channel. Magnetic field strength is varied from ±200 mT to ±250 mT. Results verify the theoretical derivations This model can be used if short channel n-MOSFETs are used to develop the Magnetic FET Sensor (MFS). This type of sensor has many practical applications.
A Threshold Voltage Model for sub-100 nm Pocket Implanted NMOSFET
(IEEE, 2007-05-07) Bhuyan, Muhibul Haque; Ferdous, Fouzia; Khosru, Quazi Deen Mohd
Pocket implantation is a very useful technique to suppress short channel effects in submicrometer MOS devices. This paper presents a threshold voltage model of pocket implanted sub-100 nm nMOSFETs. The proposed model is derived using two linear equations to simulate the pockets along the channel at the surface from the source and drain edges towards the center of the MOSFET. The threshold voltage equation is obtained by solving the 1D Poisson's equation and then applying Gauss's law at the surface. The model has a simple compact form that can be utilized to study and characterize the pocket implanted advanced ULSI devices.
Advanced Autonomous Surveillance Robot for Enhanced Monitoring and Individual Identification
(Ninety-Nine Publication, India, 2024-09-09) Islam, Moeen Ul; Purkaystha, Debanjon Dutta; Gupta, Antu Das; Saha, Sopan; Banik, Durjoy; Bhuyan, Muhibul Haque
The primary objective is to detect and identify suspicious activities and potential threats in a precise manner while prioritizing human safety leveraging surveillance technology and machine learning. The implementation of this system involves coding in Python using the OpenCV library. It utilizes Wi-Fi connectivity as a means of communication. The robot is equipped with a Raspberry Pi along with a USB web camera, which captures video footage and employs object detection algorithms to identify unknown individuals. When a person or an object is detected, the system sends an email to the dedicated email addresses including an image of the unrecognized individual. The proposed system is designed as a unified unit responsible for monitoring the environment for hazardous conditions and delivering real-time video feedback. The proposed system is simulated and tested in real-time to observe its functionality, and it is observed that the system works properly as per given input conditions.
Advanced Color Sorting Conveyor System Using Arduino and TCS3200 Color Sensor for Precise Color Classification
(IEEE, 2025-03-14) Rahman, Md Mushfiqur; Hasan, Md Habib A; Emon, Md. Yeasin Arafat; Hossain, Md. Arafat; Rokon, Md. Abu Rubayat; Bhuyan, Muhibul Haque
This paper introduces an Arduino-based color-sorting conveyor belt system that automates object sorting by color. Employing a TCS3200 color sensor, an Arduino microcontroller detects red, green, and blue objects. Servo motors and IR sensors are utilized to sort objects accurately based on their color, while an LCD screen provides real-time feedback. The conveyor belt's motor controller regulates speed and direction, pausing during color detection for precise sorting. Experimental results demonstrate 100% efficiency in color detection and sorting, highlighting the system's potential for industrial automation applications.
Advanced Image Processing Based Solar Panel Dust Detection System
(IEEE, 2024-02-27) Karima, Nazmun Nahar; Saikat, Mahmudul Hasan; Rimon, Md Kamruzzaman; Molla, Md Sumon; Bhuyan, Muhibul Haque
In this research paper, a novel, fast, and self-adaptive image processing technique is proposed for dust detection and identification, and extraction of solar images this technique uses computer vision algorithms and machine learning models to autonomously recognize dust particles on solar panels using a dust detect camera. An image processing technique was used to detect dust on the solar panel for optimum operation of a PV panel, and hence to increase the generation of renewable energy. After analyzing several image processing techniques, an advanced image processing method has been used for dust identification purposes. This image processing is done by the Visual Studio software. To detect dust on solar panels, various clean and dusty solar panel images were collected, and the database was created. Then image processing technique was applied to detect whether the panel was dusty or clean. The results were analyzed in various ways. The analysis revealed that the image processing techniques can be applied effectively to detect the dust on solar panels. This technique may help to clean the solar panel and thus generate more electrical output power from the solar energy.
An Analytical Subthreshold Drain Current Model for Pocket Implanted Nano Scale n-MOSFET
(Journal of Electron Devices, 2010-10-31) Bhuyan, Muhibul Haque; Khosru, Quazi Deen Mohd
This paper presents an analytical subthreshold drain current model for pocket implanted nano scale n-MOSFET. The model is developed by using the linear pocket profiles at the source and drain edges and by solving the Poisson's equation in the depletion region at the surface with the appropriate boundary conditions at source and drain for deriving the surface potential. The model includes the effective doping concentration of the two linear pocket profiles. Electron current density is obtained from the conventional drift-diffusion equation. Integration of surface potential is obtained numerically. Effective channel thickness is obtained by applying Gauss's Law at the surface. The simulation results show that the derived subthreshold drain current model has a simple compact form that can be utilized to study and characterize the pocket implanted advanced ULSI MOS devices.
An Analytical Surface Potential Model for Pocket Implanted Sub-100 nm n-MOSFET
(IEEE, 2009-01-27) Bhuyan, Muhibul Haque; Khosru, Quazi Deen Mohd
This paper presents an analytical surface potential model for pocket implanted sub-100 nm n-MOSFET. The model is derived by solving Poisson's equation in the depletion region at the surface with the appropriate boundary conditions at the source and drain. The model includes the effective doping concentration of the two linear pocket profiles at the source and drain sides of the device. The model also incorporates the drain and substrate bias effect below and above threshold conditions. The simulation results show that the derived surface potential model has a simple compact form that can be utilized to study and characterize the pocket implanted advanced ULSI devices.
Analysis of Three Level PWM for Two-Phase Voltage Source Inverters
(Medwell Online Publishing Company, Pakistan, 2007-01-31) Bhuyan, Muhibul Haque; Rahman, Kazi Mujibur
Three level PWM scheme offer good harmonic spectrum, more output voltage and less switching losses as compared to two-level PWM strategy. For inverters driving resistive loads, the three-level PWM gives better performance than two-level PWM. But, for inductive loads, due to lack of zero voltage freewheeling path, the load current waveform distorts and contain unwanted low order harmonics. Analysis of inverter performance with three-level PWM driving inductive load has not been investigated so far. In this paper the performance of a two-phase inverter driving a two-phase induction motor is investigated with three-level PWM technique. The performance of the three-level PWM scheme is simulated with a theoretical model using regular sampling strategy. The scheme is experimentally implemented with a TMS320C50 digital signal processor board and a 0.5 HP two-phase induction motor is used as the load of the two-phase inverter. The experimental performance is found in good agreement with the theoretical results and hence validates the theoretical model of three-level PWM.