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Analysis and circuit design of isolated forward SEPIC converter with minimum-phase stability Circuit World (IF 0.9) Pub Date : 2024-02-06 Alireza Goudarzian, Rohallah Pourbagher
Purpose Conventional isolated dc–dc converters offer an efficient solution for performing voltage conversion with a large improved voltage gain. However, the small-signal analysis of these converters shows that a right-half-plane (RHP) zero appears in their control-to-output transfer function, exhibiting a nonminimum-phase stability. This RHP zero can limit the frequency response and dynamic specifications
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An LLC resonant converter with wide output range fixed frequency PWM control for PEV charging applications Circuit World (IF 0.9) Pub Date : 2024-01-31 Dangshu Wang, Menghu Chang, Licong Zhao, Yuxuan Yang, Zhimin Guan
Purpose This study aims to regarding the application of traditional pulse frequency modulation control full-bridge LLC resonant converters in wide output voltage fields such as on-board chargers, there are issues with wide frequency adjustment ranges and low conversion efficiency. Design/methodology/approach To address these issues, this paper proposes a fixed-frequency pulse width modulation (PWM)
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A pulsed bipolar current-mode power supply with high power factor in a single stage for dielectric barrier discharge application Circuit World (IF 0.9) Pub Date : 2024-02-02 Xiongmin Tang, Zexin Zhou, Yongquan Chen, ZhiHong Lin, Miao Zhang, Xuecong Li
Purpose Dielectric barrier discharge (DBD) is widely used in the treatment of skin disease, surface modification of material and other fields of electronics. The purpose of this paper is to design a high-performance power supply with a compact structure for excimer lamps in electronics application. Design/methodology/approach To design a high-performance power supply with a compact structure remains
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Performance analysis of FEC based SR motor drive using fuzzy tuned PI controller Circuit World (IF 0.9) Pub Date : 2023-12-20 Indira Damarla, Venmathi M., Krishnakumar V., Anbarasan P.
Purpose In this paper, a new front end converter (FEC) topology has been proposed for the switched reluctance (SR) motor drive. This study aims to present the performance analysis of FEC-based SR motor drive using various types of control schemes like conventional proportional integral (PI) controller, fuzzy logic controller (FLC) and fuzzy-tuned proportional integral controller (Fuzzy-PI). Design
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Light-load performance optimization for LLC resonant converter Circuit World (IF 0.9) Pub Date : 2023-10-13 Xuliang Yao, Xiao Han, Yuefeng Liao, Jingfang Wang
Purpose This study aims to solve the problem that under light-load conditions, the output voltage regulation capability is lost due to the fact that the voltage gain of the LLC resonant converter does not decrease with the increase of the switching frequency. Design/methodology/approach In this paper, the impedance model considering the parasitic parameters of the primary and secondary sides is calculated
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Analysis of output characteristics of wireless power transfer system based on LCC/S-S hybrid compensation structure Circuit World (IF 0.9) Pub Date : 2023-09-26 Dangshu Wang, Xuan Deng, Zhimin Guan, Shulin Liu, Yaqiang Yang, Xinxia Wang
Purpose To simplify the circuit design and control complexity of the magnetic coupling resonant wireless charging system, the radio energy transmission constant current and constant voltage charging is realized. Design/methodology/approach The purpose of this study is to simplify the circuit design and control complexity of the magnetic coupling resonance wireless charging system, in order to achieve
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Investigation on reliability of classical industrial motor drives using GoldSim Monte Carlo reliability workbench Circuit World (IF 0.9) Pub Date : 2023-08-24 Raghavendra Rao N.S., Chitra A.
Purpose The purpose of this study is to propose an extended reliability method for an industrial motor drive by integrating the physics of failure (PoF). Design/methodology/approach Industrial motor drive systems (IMDS) are currently expected to perform beyond the desired operating conditions to meet the demand. The PoF of the subsystem affects its reliability under such harsh operating circumstances
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Neutral-point-clamped inverter based synchronous reluctance motor drive for solar pump application Circuit World (IF 0.9) Pub Date : 2023-05-17 Rajini V., Jassem M., Nagarajan V.S., Sreeya Galla N.V. Sai, Jeyapradha Rb
Purpose Industrial drives require appropriate control systems for reliable and efficient performance. With synchronous reluctance machines (SynRMs) slowly replacing the most commonly used induction, switched reluctance and permanent magnet machines, it is essential that the drive and its control be properly selected for enhanced performance. But the major drawback of synchronous reluctance motor is
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Hardware implementation of a novel hybrid MPPT technique for fast tracking of GMPP in solar PV system under PSCs Circuit World (IF 0.9) Pub Date : 2023-05-02 Praveen Kumar Bonthagorla, Suresh Mikkili
Purpose To generate electricity, solar photovoltaic (PV) systems are among the best, most eco-friendly and most cost-effective solutions available. Extraction of maximum possible electricity from the solar PV system is complicated by a number of factors brought on by the ever-changing weather conditions under which it must operate. Many conventional and evolutionary algorithm-based maximum power point
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Research and optimization design of two-stage isolated inverter power supply based on series quasi-resonance Circuit World (IF 0.9) Pub Date : 2023-04-03 Dangshu Wang, Jiaan Yi, Luwen Song, Xuan Deng, Xinxia Wang, Zhen Dong
Purpose This paper aims to solve the problems of large hard switching loss and unclear resonant parameter design in the existing inverter power supply topology. Design/methodology/approach This paper proposes a simple and reliable two-stage isolated inverter composed of series quasi-resonant push-pull and external freewheeling diode full-bridge inverter. The power supply topology is analyzed, the topology
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Fault diagnosis of wind turbine power converter using intrinsic mode functions with relative energy entropy Circuit World (IF 0.9) Pub Date : 2023-03-21 Manikandan R., Raja Singh R.
Purpose The purpose of this paper is to prevent the destruction of other parts of a wind energy conversion system because of faults, the diagnosis of insulated-gate bipolar transistor (IGBT) faults has become an essential topic of study. Demand for sustainable energy sources has been prompted by rising environmental pollution and energy requirements. Renewable energy has been identified as a viable
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Radial basis function neural network MPPT controller-based microgrid for hybrid stand-alone energy system used for irrigation Circuit World (IF 0.9) Pub Date : 2023-01-13 Jenitha R., K. Rajesh
Purpose The main purpose of this controller is to carryout irrigation by the farmers with renewable energy resources. Design/methodology/approach The proposed design includes the Deep learning based intelligent stand-alone energy management system used for irrigation purpose. The deep algorithm applied here is Radial basis function neural network which tracks the maximum power, maintains the battery
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Parameters optimization design method for LLC resonant converter based on impedance model Circuit World (IF 0.9) Pub Date : 2022-12-02 Xuliang Yao, Xiao Han, Yuefeng Liao, Jingfang Wang
Purpose This paper aims to better design the resonant tank parameters for LLC resonant converter. And, it is found that under heavy load, the voltage gain is affected by junction capacitors of the primary side switching and the parasitic parameters of the secondary side diodes converted to the primary side, which will cause the voltage gain decreased when the switching frequency decreased. Design/
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Five-dimensional memristive Hopfield neural network dynamics analysis and its application in secure communication Circuit World (IF 0.9) Pub Date : 2022-11-10 Xinxing Yin, Juan Chen, Wenxin Yu, Yuan Huang, Wenxiang Wei, Xinjie Xiang, Hao Yan
Purpose This study aims to improve the complexity of chaotic systems and the security accuracy of information encrypted transmission. Applying five-dimensional memristive Hopfield neural network (5D-HNN) to secure communication will greatly improve the confidentiality of signal transmission and greatly enhance the anticracking ability of the system. Design/methodology/approach Chaos masking: Chaos
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Investigation of integrated converter circuit and enriched error tolerant fuzzy logic controller based control approach for solar powered EV system Circuit World (IF 0.9) Pub Date : 2022-11-07 Rajamohana Kuselan, Venkatesan Sundharajan
Purpose This study aims to extend the driving range by on-board charging with use of photovoltaic (PV) source, avoiding the dependency on the grid supply and energy storage system in addition to that reduce the conversion complexity influenced on converter section of electric vehicle (EV) system. Design/methodology/approach This paper proposed a PV fed integrated converter topology called integrated
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Circuit analysis and modeling of a soft-switching pulse power supply based on full-bridge inverter for DBD application Circuit World (IF 0.9) Pub Date : 2022-10-10 Xiongmin Tang, Tianhong Jiang, Weizheng Chen, ZhiHong Lin, Zexin Zhou, Chen Yongquan, Miao Zhang
Purpose How to use a simple and classical topology to provide a high-efficiency excitation voltage for dielectric barrier discharge (DBD) loads is one of the primary problems to be solved for DBD application fields. Design/methodology/approach To address the issue, a set of modes that can generate a high-efficiency pulse excitation voltage in a full-bridge inverter are adopted. With the set of modes
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Optimization and control strategy of electric vehicles access to power grid Circuit World (IF 0.9) Pub Date : 2022-10-05 Wanjun Yin, Xuan Qin
Purpose This paper aims to reduce the impact of disordered charging of large-scale electric vehicles (EVs) on the grid. EV is great significance for environmental protection, energy conservation and emission reduction to replace fuel vehicles with EVs. However, as a kind of random mobile load, large-scale integration into the power grid may lead to power quality problems such as line overload, line
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A low power high speed single phase clock level restoring 16T master-slave flip-flop Circuit World (IF 0.9) Pub Date : 2022-10-05 Alok Kumar Mishra, Urvashi Chopra, Vaithiyanathan D., Baljit Kaur
Purpose A low power flip-flop circuit is designed for energy-efficient devices. Digital sequential circuits are in huge demand because every processor has most of the parts of digital circuit. The sequential circuits consist of a basic data storing element, a latch is used to store single bit data. The flip-flop takes a sufficient portion of the total chip area and overall power consumption as well
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Novel and simplified implementation of digital high-power pulsed MIG welding power supply with LLC resonant converter Circuit World (IF 0.9) Pub Date : 2022-09-29 Kaiyuan Wu, Hao Huang, Ziwei Chen, Min Zeng, Tong Yin
Purpose This paper aims to overcome the limitations of low efficiency, low power density and strong electromagnetic interference (EMI) of the existing pulsed melt inert gas (MIG) welding power supply. So a novel and simplified implementation of digital high-power pulsed MIG welding power supply with LLC resonant converter is proposed in this work. Design/methodology/approach A simple parallel full-bridge
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Sliding mode predictive control of a five-level rectifier with only four–IGBT Circuit World (IF 0.9) Pub Date : 2022-09-29 Yifeng Zhu, Ziyang Zhang, Hailong Zhao, Shaoling Li
Purpose Five-level rectifiers have received widespread attention because of their excellent performance in high-voltage and high-power applications. Taking a five-level rectifier with only four-IGBT for this study, a sliding mode predictive control (SMPC) algorithm is proposed to solve the problem of poor dynamic performance and poor anti-disturbance ability under the traditional model predictive control
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Modified unipolar SPWM inverter for solar PV applications using MATLAB/Simulink model interfaced with dSPACE DS1104 Circuit World (IF 0.9) Pub Date : 2022-09-20 Ashok Kumar L., Kumaravel R.
Purpose The purpose of this paper is to check the Solar Photovoltaic (PV) inverter working condition with modified unipolar switching pulse. The gate pulse for the inverter switches is generated in MATLAB simulation and interfaced with hardware protype. Simulation results can be compared with hardware results. Design/methodology/approach A considerable amount of research has been done on different
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Design of temperature-based adaptive refresh circuit for 2T array memory Circuit World (IF 0.9) Pub Date : 2022-09-21 Wanjun Yin, Lin-na Jiang
Purpose The purpose of this paper through the redundant monitoring unit reflecting the real-time temperature change of the array, an adaptive refresh circuit based on temperature is designed. Design/methodology/approach This paper proposed a circuit design for temperature-adaptive refresh with a fixed refresh frequency of traditional memory, high refresh power consumption at low temperature and low
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Supply less sensitive ring voltage-controlled oscillator for microwave L-band frequencies Circuit World (IF 0.9) Pub Date : 2022-09-15 Parul Trivedi, B.B. Tiwari
Purpose The primary aim of this paper is to present a novel design approach for a ring voltage-controlled oscillator (VCO) suitable for L-band applications, whose oscillation frequency is less sensitive to power supply variations. In a few decades, with the advancement of modern wireless communication equipment, there has been an increasing demand for low-power and robust communication systems for
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Modeling and characterization of capacitor storage circuit for piezoelectric vibration energy harvester Circuit World (IF 0.9) Pub Date : 2022-09-12 Sheng Wei
Purpose This paper aims to study a power management circuit for a piezoelectric vibration energy harvester. It presents how to accumulate energy and provide regulated DC voltage for practical applications. Design/methodology/approach Energy storage and extraction circuit are proposed. While the storage stage consists of a full wave rectifier and a storage capacitor, the extraction stage includes a
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Grid-connected solar photovoltaic-fed brushless DC motor drive for water pumping system using colliding body optimization technique Circuit World (IF 0.9) Pub Date : 2022-08-04 Biranchi Narayan Kar, Paulson Samuel, Jatin Kumar Pradhan, Amit Mallick
Purpose This paper aims to present an improvement to the power quality of the grid by using a colliding body optimization (CBO) based proportional-integral (PI) compensated design for a grid-connected solar photovoltaic-fed brushless DC motor (BLDC)-driven water pumping system with a bidirectional power flow control. The system with bidirectional power flow allows driving the pump at full proportions
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Voltage sag compensation at load side in armor fighting vehicles using ultra capacitor Circuit World (IF 0.9) Pub Date : 2022-07-29 Saravanan N., Hosimin Thilagar S.
Purpose The purpose of this paper rapid development of various voltage sag compensation techniques in DC bus using ultra-capacitors (UCs) provides satisfactory results when compared with required peak power demand for shorter duration. Later, UCs have been used as floating capacitors [1] [2]. Various UCs are available based on internal resistances which also rely on its manufacturing materials, similar
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Hidden multiwing chaotic attractors with multiple stable equilibrium points Circuit World (IF 0.9) Pub Date : 2022-06-20 Quanli Deng, Chunhua Wang, Yazheng Wu, Hairong Lin
Purpose The purpose of this paper is to construct a multiwing chaotic system that has hidden attractors with multiple stable equilibrium points. Because the multiwing hidden attractors chaotic systems are safer and have more dynamic behaviors, it is necessary to construct such a system to meet the needs of developing engineering. Design/methodology/approach By introducing a multilevel pulse function
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Stability analysis of two port renewable energy interface for telecom applications Circuit World (IF 0.9) Pub Date : 2022-06-09 Rajini V., Margaret Amutha W.
Purpose The purpose of this paper is to carry out a detailed analysis of two port converter fed by Solar and wind sources during different operational modes by small signal modelling. The converter is fully characterized and simulated using Matlab/Simulink. The voltage and current waveforms along with their corresponding expressions describing the converter operation are presented in detail. Then the
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Research on circuit analysis and optimization of wireless power transmission system with embedded coil Circuit World (IF 0.9) Pub Date : 2022-06-08 Han Liu, Guojin Yang, Rong Wang
Purpose The wireless power transmission (WPT) system with an embedded coil will achieve a more flexible charging operation and higher system efficiency. However, the comprehensive analysis considering cross-coupling for WPT with embedded coil is rarely investigated. This study aims to improve the system efficiency of WPT with the embedded coil based on circuit analysis and optimization of embedded
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Review and design of modular multilevel inverter with modified multicarrier PWM techniques for solar PV applications Circuit World (IF 0.9) Pub Date : 2022-06-08 Chinnaraj Gnanavel, Kumarasamy Vanchinathan
Purpose These implementations not only generate excessive voltage levels to enhance the quality of power but also include a detailed investigating of the various modulation methods and control schemes for multilevel inverter (MLI) topologies. Reduced harmonic modulation technology is used to produce 11-level output voltage with the production of renewable energy applications. The simulation is done
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Comparative analysis of dual second-order generalized integrator-phase locked loop based series hybrid filter and static synchronous compensator for load voltage compensation and power quality improvement with grid synchronization in islanded microgrid Circuit World (IF 0.9) Pub Date : 2022-06-07 Vasantharaj Subramanian, Indragandhi Vairavasundaram
Purpose The purpose of this study is to eliminate voltage harmonics and instantly measure the positive sequence fundamental voltage during unbalanced grid conditions, the dual second-order generalized integrator-phase locked loop used in series hybrid filter structures is often used in grid synchronisation in three-phase networks. The preferred series active hybrid power filter simultaneously compensates
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Intelligent series inducing switching scheme (ISISS) to enhance power delivery in shaded photovoltaic array Circuit World (IF 0.9) Pub Date : 2022-05-31 Srinivasan Vadivel, Boopathi C.S., Sridhar R., Tarana Kaovasia
Purpose The aim of this research study is to mitigate shading impact on solar photovoltaic array. Photovoltaic (PV) array when getting shaded not only results in appreciable power loss but also exhibits multiple power peaks. Due to these multiple power peaks, the maximum power point tracking (MPPT) controllers’ performance will be affected, as most of the times it ends up in tracking the local maximum
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Design and implementation of a single-phase buck-type inverter via an efficient hybrid control technique Circuit World (IF 0.9) Pub Date : 2022-05-27 Faruk Yalcin, Ugur Arifoglu, Irfan Yazici
Purpose This paper aims to present the design and implementation of a new general-purpose single-phase buck-type inverter. Design/methodology/approach The operation of the proposed inverter is based on the general-purpose buck converter. The proposed buck-type inverter topology is designed with reduced numbers of passive and active elements to minimize design cost and complexity. Also, an efficient
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Optimal location and sizing of various DG units in real distribution substation using heuristic approach Circuit World (IF 0.9) Pub Date : 2022-05-19 Merlin Sajini M.L., Suja S., Merlin Gilbert Raj S.
Purpose The purpose of the study is distributed generation planning in a radial delivery framework to identify an appropriate location with a suitable rating of DG units energized by renewable energy resources to scale back the power loss and to recover the voltage levels. Though several algorithms have already been proposed through the target of power loss reduction and voltage stability enhancement
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A novel design of N-bit approximate comparator for image processing applications Circuit World (IF 0.9) Pub Date : 2022-05-12 Naresh Kattekola, Shubhankar Majumdar
Purpose This paper aims to implement a novel design of approximate comparator which can be suitable for image processing applications. Design/methodology/approach Here, the N-bit approximate comparator is implemented by taking reference of N as 2-, 4- and 8-bit. The design analyses the fractional change in error to bit in several bit formats. The final implementation of approximate comparator design
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Design of a fractional-order chaotic secure communication circuit based on sliding mode theory and microcontroller Circuit World (IF 0.9) Pub Date : 2022-04-21 Zuanbo Zhou, Wenxin Yu, Junnian Wang, Yanming Zhao, Meiting Liu
Purpose With the development of integrated circuit and communication technology, digital secure communication has become a research hotspot. This paper aims to design a five-dimensional fractional-order chaotic secure communication circuit with sliding mode synchronous based on microcontroller (MCU). Design/methodology/approach First, a five-dimensional fractional-order chaotic system for encryption
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Analysis of the influence factors of VSC–HVDC on AC three-phase short-circuit current level Circuit World (IF 0.9) Pub Date : 2022-04-12 Jingbo Zhao, Yan Tao, Zhiming Sun
Purpose This paper aims to clarify voltage sourced converter’s (VSC’s) influence rules on the alternating current (AC) short-circuit current and identify the key factors, so as to propose the short-circuit current suppression strategy. Design/methodology/approach This paper investigates the key factors which impact the short-circuit current supplied by the VSC based on the equivalent current source
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Experimental verification of STATCOM based on quasi impedance source inverter for power quality enhancement in the hybrid distributed generation system Circuit World (IF 0.9) Pub Date : 2022-03-30 Karthick R., Ramakrishnan C., Sridhar S.
Purpose This paper aims to introduce the quasi impedance source inverter (qZSI)-based static compensator (STATCOM), which is incorporated into the hybrid distributed power generation system for enhancement of power quality. The distributed power generation system includes the photovoltaic (PV), wind energy conversion system (WECS) and battery energy storage system. Design/methodology/approach The WECS
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Comparative study on minimization of conduction and switching losses in cascaded multilevel inverter via reduced switches and equal voltage source-sharing Circuit World (IF 0.9) Pub Date : 2022-03-23 Dania Batool, Qandeel Malik, Tila Muhammad, Adnan Umar Khan, Jonghoon Kim
Purpose Multilevel inverters play a major role in the development of high-power industrial applications. In traditional low-level inverters (e.g. 2-level), the switching frequency is restricted and the harmonic spectrum of the system is hard to meet power requirements. Similarly, high-level inverters consist of a large number of switches, complex modulation techniques and complex hardware architecture
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A new tri-source symmetric cascaded multilevel inverter topology with reduced power components Circuit World (IF 0.9) Pub Date : 2022-02-28 Jayarama Pradeep, Krishnakumar Vengadakrishnan, Anbarasan Palani, Thamizharasan Sandirasegarane
Purpose Multilevel inverters become very popular in medium voltage applications owing to their inherent capability of reconciling stepped voltage waveform with reduced harmonic distortion and electromagnetic interference. They have several disadvantages like more number of switching devices required and devices with high voltage blocking and need additional dc sources count to engender particular voltage
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Design and fabrication of rotary magnetostrictvie energy harvester for knee-joint wearable applications Circuit World (IF 0.9) Pub Date : 2022-02-17 Baiping Yan, Dazhuo Huang, Junjie Hong, Chengming Zhang
Purpose This paper aims to present the design and fabrication of a rotary magnetostrictive energy generator, using to harvest the rotation energy of human knee joint. Design/methodology/approach A rotary magnetostrictive energy generator is presented in this paper. The harvester consists of six movable flat Terfenol-D rods, surround by the picked-up coils respective, and alternate permanent magnet
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Optoelectronic characterization of laser diodes with different electrode structures Circuit World (IF 0.9) Pub Date : 2022-02-15 Tao Lin, Yaning Li, Rongjin Zhao, Zekun Ma, Jianan Xie
Purpose This paper aims to improve the device performance from the perspective of reducing ohmic contact resistance; the effects of different electrode structures and alloying parameters on the series resistance and power-current-voltage of laser diodes (LDs) have been investigated in this paper. Design/methodology/approach Four groups of p-GaAs side metal electrodes with different metal layer arrangements
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Low-power and low-energy CNFET-based approximate full adder cell for image processing applications Circuit World (IF 0.9) Pub Date : 2022-02-07 Yavar Safaei Mehrabani, Mojtaba Maleknejad, Danial Rostami, HamidReza Uoosefian
Purpose Full adder cells are building blocks of arithmetic circuits and affect the performance of the entire digital system. The purpose of this study is to provide a low-power and high-performance full adder cell. Design/methodology/approach Approximate computing is a novel paradigm that is used to design low-power and high-performance circuits. In this paper, a novel 1-bit approximate full adder
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Study on load monitoring and demand side management strategy based on Elman neural network optimized by sparrow search algorithm Circuit World (IF 0.9) Pub Date : 2022-01-27 Yuanyuan Fan, Tingyu Sui, Kang Peng, Yingjun Sang, Fei Huang
Purpose This paper aims to collect the energy consumption data and carry out energy consumption analysis of chemical enterprises, which is helpful to grasp the working conditions of each equipment accurately and to perfect the demand side management (DSM) for the user in the terminal. Design/methodology/approach The paper proposes a load monitoring system of chemical enterprises to collect the energy
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A fast and cost-effective short circuit protection scheme for low-power converters for small-scale photovoltaic application Circuit World (IF 0.9) Pub Date : 2022-01-21 Mazdak Ebadi, Negin Abbasi, Hamidreza Maghsoudi
Purpose This paper aims to propose an integrated protection scheme for converters of a low-power, low-cost photovoltaic system. Power electronic converters use a variety of methods to limit overload and fault current. The use of insulated and non-insulated sensors along with additional circuits to detect and limit fault current can cause current to be limited or completely cut off before damage to
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Pulse density modulation control-based multi-load handling three leg inverter for cooking applications Circuit World (IF 0.9) Pub Date : 2022-01-11 Pradeep Vishnuram, Ramachandiran Gunabalan
Purpose Induction heating applications aided by power electronic control have become very attractive in the recent past. For cooking applications, power electronics circuits are very suitable to feed power to multi loads with an appropriate control technique. The purpose of this paper is to develop a three leg inverter to feed power to three loads simultaneously and independently. Design/methodology/approach
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A compact high gain wideband millimeter wave 1 × 2 array antenna for 26/28 GHz 5G applications Circuit World (IF 0.9) Pub Date : 2021-12-21 Yousra Ghazaoui, Mohammed EL Ghzaoui, Sudipta Das, BTP Madhav, Ali el Alami
Purpose This paper aims to present the design, fabrication and analysis of a wideband, enhanced gain 1 × 2 patch antenna array with a simple profile structure to meet the desired antenna traits, such as wide bandwidth, high gain and directional patterns expected for the upcoming fifth-generation (5G) wireless applications in the millimeter wave band. To enhance these parameters (bandwidth and gain)
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Canard-induced mixed mode oscillations as a mechanism for the Bonhoeffer-van der Pol circuit under parametric perturbation Circuit World (IF 0.9) Pub Date : 2021-12-21 Yue Yu, Cong Zhang, Zhenyu Chen, Zhengdi Zhang
Purpose This paper aims to investigate the singular Hopf bifurcation and mixed mode oscillations (MMOs) in the perturbed Bonhoeffer-van der Pol (BVP) circuit. There is a singular periodic orbit constructed by the switching between the stable focus and large amplitude relaxation cycles. Using a generalized fast/slow analysis, the authors show the generation mechanism of two distinct kinds of MMOs.
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Suitability of passive RC-network-based inductorless bridged-T as a bandpass NGD circuit Circuit World (IF 0.9) Pub Date : 2021-12-07 Sébastien Lalléchére, Jamel Nebhen, Yang Liu, George Chan, Glauco Fontgalland, Wenceslas Rahajandraibe, Fayu Wan, Blaise Ravelo
Purpose The purpose of this paper is to study, a bridged-T topology with inductorless passive network used as a bandpass (BP) negative group delay (NGD) function. Design/methodology/approach The BP NGD topology under study is composed of an inductorless passive resistive capacitive network. The circuit analysis is elaborated from the equivalent impedance matrix. Then, the analytical model of the C-shunt
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A new approach for task managing in the fog-based medical cyber-physical systems using a hybrid algorithm Circuit World (IF 0.9) Pub Date : 2021-12-07 Jiuhong Yu, Mengfei Wang, Yu J.H., Seyedeh Maryam Arefzadeh
Purpose This paper aims to offer a hybrid genetic algorithm and the ant colony optimization (GA-ACO) algorithm for task mapping and resource management. The paper aims to reduce the makespan and total response time in fog computing- medical cyber-physical system (FC-MCPS). Design/methodology/approach Swift progress in today’s medical technologies has resulted in a new kind of health-care tool and therapy
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Comparative analysis of two-level and three-level multilevel inverter for electric vehicle application using BLDC motor drive Circuit World (IF 0.9) Pub Date : 2021-12-02 Bharathi Sankar Ammaiyappan, Seyezhai Ramalingam
Purpose The conventional two-level inverter suffers from harmonics, higher direct current (DC) link voltage requirement, higher dv/dt and heating of the rotor. This study aims to overcome by using a multilevel inverter for brushless DC (BLDC) drive. Design/methodology/approach This paper presents a comparative analysis of the conventional two-level and three-level multilevel inverter for electric vehicle
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TPTPC and BHC integrated grid connected energy storage system for power loss reduction Circuit World (IF 0.9) Pub Date : 2021-12-01 Suresh Krishnan, Pothuraju Pandi, Subbarao Mopidevi
Purpose This paper aims to propose a bidirectional hidden converter (BHC)-based three-phase DC–AC conversion for energy storage application. BHC is the new concept to vary an energy storage device voltage into wide range. Hidden converter power loss and power rating are reduced by using zero-sequence injection-based carrier-based pulse-width modulation (CBPWM) strategy. Design/methodology/approach
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Energy and time-efficient circuitry of bat-bootstrap and comp-lifier for ultra-low power SAR-ADC Circuit World (IF 0.9) Pub Date : 2021-12-01 Muhammad Yasir Faheem, Shun'an Zhong, Muhammad Basit Azeem, Xinghua Wang
Purpose Successive Approximation Register-Analog to Digital Converter (SAR-ADC) has been achieved notable technological advancement since the past couple of decades. However, it’s not accurate in terms of size, energy, and time consumption. Many projects proposed to make it energy efficient and time-efficient. Such designs are unable to deliver two parallel outputs. Design/methodology/approach To this
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Design of ternary subtractor using multiplexers Circuit World (IF 0.9) Pub Date : 2021-11-24 Tulasi Naga Jyothi Kolanti, Vasundhara Patel K.S.
Purpose The purpose of this paper is to design multiplexers (MUXs) based on ternary half subtractor and full subtractor using carbon nanotube field-effect transistors. Design/methodology/approach Conventionally, the binary logic functions are developed by using the binary decision diagram (BDD) systems. Each node in BDD is replaced by 2:1 MUX to implement the digital circuits. Similarly, in the ternary
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A new technique for right half plane zero elimination from dynamics of a boost converter using magnetic coupling concept Circuit World (IF 0.9) Pub Date : 2021-11-10 Alireza Goudarzian
Purpose Control-signal-to-output-voltage transfer function of the conventional boost converter has at least one right-half plane zero (RHPZ) in the continuous conduction mode which can restrict the open-loop bandwidth of the converter. This problem can complicate the control design for the load voltage regulation and conversely, impact on the stability of the closed-loop system. To remove this positive
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Crosstalk reduction using novel cross-shaped resonators with via fence in high-frequency transmission lines Circuit World (IF 0.9) Pub Date : 2021-10-27 Yokesh V., Gulam Nabi Alsath Mohammed, Malathi Kanagasabai
Purpose The purpose of this paper is to design a suitable guard trace to reduce the electromagentic interference between two closely spaced high frequency transmission lines. A novel cross-shaped resonator combined via fence is passed down to alleviate far-end and near-end crosstalk (NEXT) in tightly coupled high-speed transmission lines. The distance between the adjacent transmission lines is increased
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Design considerations for implementation of planar antennas for millimeter wave (mmW) 5G network: a review Circuit World (IF 0.9) Pub Date : 2021-09-27 Sagar Juneja, Rajendra Pratap, Rajnish Sharma
Purpose Propagation characteristics of millimeter wave (mmW) frequencies that are being explored for implementing 5G network are quite different from sub 3GHz frequencies in which 4G network is operating, and hence antenna design for mmW 5G network is going to be significantly different. The purpose of this paper is to bring forth the unique challenges and opportunities of planar antenna design for
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An energy-aware approach for resources allocating in the internet of things using a forest optimization algorithm Circuit World (IF 0.9) Pub Date : 2021-09-24 Minning Wu, Feng Zhang, X. Rui
Purpose Internet of things (IoT) is essential in technical, social and economic domains, but there are many challenges that researchers are continuously trying to solve. Traditional resource allocation methods in IoT focused on the optimal resource selection process, but the energy consumption for allocating resources is not considered sufficiently. This paper aims to propose a resource allocation
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Novel step-down topologies of star-connected autotransformer Circuit World (IF 0.9) Pub Date : 2021-09-16 JiaRong Wang, Bo He, XiaoQiang Chen
Purpose This paper aims to obtain a symmetrical step-down topology with lower equivalent capacity and wider step-down range under the condition of the same output. Two new symmetrical step-down topologies of star-connected autotransformers are proposed in this paper. Taking the equivalent capacity as the main parameter, the obtained topologies are modeled and analyzed in detail. Design/methodology/approach
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An inductorless piezoelectric energy harvesting interface circuit using gyrator induced voltage flip technique Circuit World (IF 0.9) Pub Date : 2021-09-13 Jitendra B. Zalke, Sandeepkumar R. Pandey, Ruchir V. Nandanwar, Atharva Sandeep Pande, Pravin Balu Nikam
Purpose The purpose of this research paper is to explore the possibility to enhance the power transfer from piezoelectric energy harvester (PEH) source to the load. As the proposed gyrator-induced voltage flip technique (GIVFT) does not require bulky components such as physical inductors, it is easily realizable in small integrated circuits (IC) package thereby offering performance benefits, reducing