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108 articles for “Diode”
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Transient Analysis of Electronic Circuits Including Zener Diodes
Abstract: This paper addresses the transient analysis of the electronic circuits incorporating Zener diodes. It starts with suggesting a new Zener diode model. The model is based on efficiently utilized step functions of the applied voltage. It includes also the diode’s main technical parameters such as its resistances in both the forward and reverse current directions as well as its Zener’s breakdown voltage. The sharp discontinuities of the step-functions are dealt …
Published in Journal of VLSI Design Tools and Technology · Vol. 11, Issue 3, 2021 · pp. 1–9 Read article
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Analysis of Six-Pulse Bridge Circuits Including Zener and Semiconductor Diodes Part One
Abstract: This paper addresses the analysis of electronic bridge circuits including Zener and/or semiconductor diodes. The analysis is based on recently suggested models for these diodes. A compact Mathematica code written in the Versions 7.0, 11.3 and 12.2 simulating a six-pulse rectifier bridge circuit is then derived and mathematically implemented. It investigates the time-domain transient and steady-state analysis of several representative case studies. In principle, the computer simulation can yield the …
Published in Journal of VLSI Design Tools and Technology · Vol. 12, Issue 1, 2022 · pp. 14–22 Read article
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Novel Technique for the Analysis of Electronic Circuits Including Zener Diodes
Abstract: This paper addresses the analysis of electronic circuits including Zener diodes. It starts with a modified Zener diode model, which is based on expressions involving step-functions, its parameters such as the resistances in both current directions as well as its breakdown (or Zener) voltage. In contrast to the earlier approaches expressing the sharp discontinuities characterizing the step-functions in terms of inverse hyperbolic tangent terms, this paper adopts more concise and …
Published in Journal of VLSI Design Tools and Technology · Vol. 11, Issue 3, 2021 · pp. 31–41 Read article
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Analysis of Six-Pulse Bridge Circuits Including Zener and Semiconductor Diodes – Part Two
Abstract: The present study offers a generic method for simulating and modelling six-pulse rectifier bridge circuits in the time domain. These circuits can include Zener and/or semi-conductor type diodes or even a mixture of them. The governing system of simultaneous algebraic and differential equations are listed and solved numerically using a computer code written in Mathematica. The flexibly written program can handle voltage sources of any time waveform, frequency or internal …
Published in Journal of VLSI Design Tools and Technology · Vol. 12, Issue 2, 2022 · pp. 13–21 Read article
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Organic Light Emitting Diodes (OLEDs)
Abstract: This paper gives the brief analysis of Organic Light Emitting Diodes (OLED) .OLED is a special type of solid-state lighting source. An OLED device is typically formed in a sheet with emissive organic layer(s) located between a cathode and anode and deposited on a substrate. The substrate can be rigid such as glass or metal or flexible made of a polymer plastic. The number of emissive layers depends on the …
Published in Journal of Microelectronics and Solid State Devices · Vol. 8, Issue 1, 2021 · pp. 23–30 Read article
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Synthesis and Immobilization of N-doped Titanium Dioxide for Degradation of Amaranth Dye under Visible Light Irradiation from Light Emitting Diodes
Abstract: Titanium dioxide photocatalysis has a great potential as green and sustainable technology to treat pollutants present in water. In the present study, N-TiO2 (nitrogen doped titanium dioxide)photocatalyst was prepared by wet method using titanium tetra iso-propoxide and NH3. The calcination of the prepared photocatalyst was performed at different temperatures. The prepared catalyst was characterized by DRS, FE SEM and TEM. The N-TiO2 was immobilized on the surface of the quartz …
Published in Emerging Trends in Chemical Engineering · Vol. 3, Issue 2, 2016 · pp. 11–17 Read article
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Reformation of WLAN Feeler by Incorporating Varactor Diode with Negative Media Structure
Abstract: AbstractIn this manuscript, authors proposed a negative media structure with Varactor diode to reform the rectangular microstrip patch antenna parameter to a great extent. Initially basic feeler was designed and simulated, and then parameters were enhanced by implementing negative media structure. It has been observed that negative media is not sufficient to improve the parameters therefore Varactor diode was introduced to get the required improvement. This proposed design of feeler …
Published in Journal of Communication Engineering & Systems · Vol. 3, Issue 2, 2013 · pp. 33–41 Read article
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Designing of GaAs Based Resonant Tunneling Diode and Nano Scale Applications with Considering NEGF
Abstract: Present situation of eletronic area in the world required small devices as well as low power dissipation and ultra high speed application. At this moment the presence of resonant tunneling diode can over come this type of problem and take a big role in nanoscale digital and analog applications.In this researh article is to demonestrated effect of asymmetric barrier with respect to symmetric barrier and digital inverter and THz analog …
Published in Journal of VLSI Design Tools and Technology · Vol. 5, Issue 1, 2015 · pp. 1–18 Read article
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Modelling Electronic Diode Networks with PSPICE Simulation
Abstract: The dual of Thevenin, Norton equivalent circuit is used in place of any circuit/network of linear sources and immittances at at a given frequency. Both Thevenin with Norton theorem is useful for analyses and modification of circuits, to study /obtain network’s steady state response and initial condition. Methods to represent different circuits with Thevenin/Norton impedances connected at desired nodes are given using Spice/Pspice. The Thevenin/Norton impedances connected are of other …
Published in International Journal of VLSI Circuit Design & Technology · Vol. 2, Issue 2, 2024 · pp. 17–37 Read article
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Steady State and Transient Analysis of 6-Pulse Rectifier Bridges Including Faulty Diodes
Abstract: This paper addresses the steady-state and transient responses of un-controlled faulty 6-pulse diode rectifier bridge circuits. The faulty bridges can include several simultaneous diode valves’ open- or short-circuits. An efficient representation of the diodes is adopted in order to describe their performance in both the forward and reverse directions. A set of simultaneous differential and algebraic equations simulating the faulty rectifier bridge is presented. Its numerical solution is obtained through …
Published in Journal of Power Electronics and Power Systems · Vol. 10, Issue 3, 2020 · pp. 19–31 Read article
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Modelling of Grid Tied 3-Level Diode Clamped Inverter Using Sinusoidal PWM for Solar Application
Abstract: AbstractIn this paper the AC Loads are fed from solar energy by means of Three-level Diode Clamped Inverter. The entire system is three phase supply system. To make the system more efficient Maximum Power Point Tracking (MPPT) is used. The Perturb & Observe method is used to obtain voltage at maximum power. In this work Sinusoidal Pulse Width Modulation (SPWM) technique is implemented to generate gate pulses to make the …
Published in Journal of Power Electronics and Power Systems · Vol. 5, Issue 3, 2015 · pp. 9–16 Read article
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Harmonic Analysis of 6-Pulse Diode Bridge Rectifier Circuits
Abstract: This paper analyzes the steady-state harmonic performance of the six-diode, 3-phase rectifier bridge circuits. A procedure for determining the frequency spectra of the different voltages and currents within the bridge circuit, resulting from a 60-Hz 3-phase supply, is presented. The effect of the smoothing shunt-capacitor is also demonstrated. Based on a Mathematica code, the paper presents the results of a comprehensive list of case studies. The procedure can handle unsymmetrical …
Published in Journal of Power Electronics and Power Systems · Vol. 10, Issue 2, 2020 · pp. 1–10 Read article
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Power Analysis Comparison of Gated Diode Dram Cell Design on 32 nm Technology
Abstract: In this paper power consumption of Gated diode DRAM (Dynamic Random Access Memory) cells are carried out. This analysis is carried out on 32 nm scale. The DRAM cell used here are 3T1D and 2T1D DRAM cell. Static, total average and transient power for both types of cells are simulated in order to have a comparison of their performance on the same technology. A comparative study of different types of …
Published in Journal of VLSI Design Tools and Technology · Vol. 5, Issue 1, 2015 · pp. 19–23 Read article
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Simple Gain Model of Group III-V Semiconductor-based Laser Diode
Abstract: In these days, a layer of low bandgap material is sandwiched between two high bandgap layers.Most commonly-used pair of materials is gallium arsenide (GaAs) with aluminium galliumarsenide (AlGaAs) and Indium Phosphide (InP) with Indium gallium arsenide phosphide(InGaAsP) laser. A heterostructure is the junctions between different bandgap materials. Here,two such junctions are present, hence it is called the name "double heterostructure laser" orDH laser. The kind of laser diode may be …
Published in Recent Trends in Electronics Communication Systems · Vol. 7, Issue 3, 2020 · pp. 9–27 Read article
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Harmonic Analysis of Full-Wave Diode Bridge Rectifier Circuits
Abstract: This paper analyzes the steady-state harmonic performance of four-diode, single-phase full-wave rectifier bridge circuits. The frequency spectra of the source and load currents are presented. The effect of the load resistance, the source inductance, the smoothing shunt- capacitor as well as the waveform of the supply voltage is illustrated. The approach can also handle cases involving non-sinusoidal sources and non-linear loads. Based on a Mathematica code, the paper presents the …
Published in Trends in Electrical Engineering · Vol. 10, Issue 1, 2020 · pp. 7–21 Read article
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Transients of Short-Circuits and Fault Clearance in 6-Pulse Diode Rectifiers
Abstract: The paper addresses the short-circuit transients in 6-pulse diode rectifier bridges. It includes also an investigation into the transients resulting from the subsequent fault clearance. Unit-step functions are efficiently used for representing the diode characteristics and emulating the fault switching actions. The short-circuit fault and its subsequent clearance are simulated by means of a time-dependent shunt resistance at the rectifier terminals. The governing set of simultaneous algebraic and differential equations …
Published in Trends in Electrical Engineering · Vol. 10, Issue 3, 2020 · pp. 6–14 Read article
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Investigating the effect of Anodes workfunction on the Opto-electronics Performance of Organic Light Emitting Diode
Abstract: The research aims to assess the performance of organic light-emitting diodes (OLEDs) by exploring how various anode materials affect their optoelectronic properties. OLEDs are crucial for modern displays and lighting, and their efficiency and functionality are heavily influenced by the materials used in their design.This study examines four different anode materials: Indium Tin Oxide (ITO), Zinc Oxide (ZnO), Aluminum-doped Zinc Oxide (AZO), and Poly(3,4-ethylenedioxythiophene) Polystyrene Sulfonate (PEDOT: PSS). These materials …
Published in Research & Reviews : Journal of Physics · Vol. 13, Issue 2, 2024 · pp. 27–37 Read article
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Advancement in Light Emitting Diode
Abstract: This paper discusses the advancements made in light-emitting diodes (LEDs) technology over the years. Whenever a current flows through an LED, the device produces light. The paper covers the basics of LED operation and the various types of LEDs, including organic LEDs (OLEDs). It then delves into the significant improvements that have been made in LED efficiency, brightness, and color rendering. These improvements have made LEDs more energy-efficient and cost-effective, …
Published in Journal of Semiconductor Devices and Circuits · Vol. 9, Issue 3, 2022 · pp. 32–46 Read article
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On The Energization and Steady-State Performance of 6-Pulse Diode Bridge Rectifiers Supplying Constant Voltage Loads
Abstract: The paper addresses the analysis of 3-phase 6-pule diode bridge rectifier circuits supplying a special load category representable by constant voltage sources. The applied Mathematica-based solution technique can handle symmetrical and unsymmetrical 3-phase voltages. The presented results include the phase currents on the AC side as well as the magnitude and wave shape of the output current on the DC side. Several case studies demonstrating the impact of the source’s …
Published in Trends in Electrical Engineering · Vol. 11, Issue 1, 2021 · pp. 14–23 Read article
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Carbon quantum dots (CQDs) and bioinspired photonic nanomaterials have emerged as promising multifunctional platforms for a wide range of applications in optoelectronics, nanomedicine, biosensing, fluorescence imaging, and photodynamic therapy. CQDs are nanoscale carbon-based materials characterized by unique optical and electronic properties, including size-dependent photoluminescence, high photostability, excellent water solubility, low cytotoxicity, and remarkable biocompatibility. These characteristics make them attractive alternatives to conventional semiconductor quantum dots for both technological and biomedical applications. Inspired by natural photonic systems such as photosynthetic light-harvesting complexes, rhodopsin-based photoreceptors, butterfly wings, and bioluminescent organisms, researchers have developed advanced nanostructures capable of efficient photon capture, energy transfer, and photoinduced charge separation. Recent advances in synthesis techniques, including hydrothermal, solvothermal, microwave-assisted, and green synthesis approaches, have enabled precise control over the size, surface chemistry, and optical properties of CQDs. Functionalization and heteroatom doping further enhance their photophysical performance and application versatility. In optoelectronics, CQDs have been incorporated into photodetectors, solar cells, light-emitting diodes, and flexible electronic devices due to their tunable emission characteristics and efficient charge transport properties. In the biomedical field, CQDs are increasingly utilized for targeted drug delivery, bioimaging, biosensing, and photodynamic therapy because of their excellent fluorescence behavior and biological compatibility. Furthermore, bioinspired photonic nanomaterials are being explored for artificial photosynthesis and sustainable energy conversion systems, where efficient light harvesting and electron transfer are critical. This review highlights recent developments in the synthesis, photophysical properties, and multifunctional applications of CQDs and related bioinspired photonic nanomaterials, while discussing current challenges and future opportunities for the development of intelligent nanophotonic and bioelectronic technologies.
Abstract: Carbon quantum dots (CQDs) and bioinspired photonic nanomaterials have emerged as promising multifunctional platforms for a wide range of applications in optoelectronics, nanomedicine, biosensing, fluorescence imaging, and photodynamic therapy. CQDs are nanoscale carbon-based materials characterized by unique optical and electronic properties, including size-dependent photoluminescence, high photostability, excellent water solubility, low cytotoxicity, and remarkable biocompatibility. These characteristics make them attractive alternatives to conventional semiconductor quantum dots for both technological and biomedical …
Published in International Journal of Photochemistry and Photochemical Research · Vol. 4, Issue 2, 2026 · pp. 16–24 Read article