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This paper presents compact model for carbon nanotube field effect transistor (CNTFET) which is derived from electronic structure of carbon nanotube (CNT). Complete current transport model is developed from carrier concentration in CNT for different chirality. The model describes the variation of charge developed on CNT with gate voltage. I-V characteristics have been efficiently modeled and compact...
Energy management system (EMS) using natural energy such as sunlight is expected to build a low-carbon society. In this paper, we report the modeling of the Si-bifacial photovoltaic (PV) module and the accuracy evaluation of simulation at Hokuriku region where is one of heavy snowing area in Japan. We develop the simulation model of PV power generation using simulation program with integrated circuit...
This paper proposes a modeling methodology for the prediction of conducted EMI in the context of multi-physics optimizations. The study of the well-known DC-DC buck converter is chosen as illustration to validate this procedure. A bottom-up approach is used to model the entire structure. The modeling of switching cell, passive elements and also Printed Circuit Board (PCB) is presented. Models validation...
This paper discusses voltage-controlled M-M relaxation oscillator with analytical and circuit simulations. The introduced circuit has two different configurations based on the polarities of memristor; whether they are in the same direction or in the opposite direction. The Analytical formulas are function of the reference voltage such as the oscillation frequency and oscillation conditions for each...
Solar Photovoltaic cell is the smallest unit of solar photovoltaic power system, it converts light energy in to electrical energy. The phenomenon of this conversion of light energy into electrical energy is termed as Photovoltaic effect. The aim of this study is to develop a model for photovoltaic module based on mathematical expression. The conventional single diode model for solar cell with series...
This paper presents a voltage control strategy based on the optimal duty cycle for a renewable energy system comprised of a Thermoelectric Generator (TEG) in cascade with the KY-Converter, a voltage-boosting topology, and coupled to a resistive load. The mathematical model that describes the TEG is presented as well as a derivation for optimal values (i.e. current and voltage) that provide maximum...
In modular photovoltaic conditioning system (PCS), microinverter is the important device to convert solar energy to grid electricity. A hybrid resonant microconverter served as front-end converter in a two-stage microinverter with two different modes was proposed previously [1]. The topology with two operating modes can achieve wide-input regulation and maintain high-efficiency over a wide input range...
Several MOV models have been proposed to describe the dynamic behavior of a MOV. These models differ in the calculation and adjustment of model parameters. In this paper, we present a comprehensive study on the MOV characteristics. A model with both nonlinear resistance and nonlinear inductance is proposed. The calculation method of nonlinear inductance and nonlinear resistance are presented and the...
Recently, due to their high performance, electrical components with Pulse Width Modulation and a motor are being used in automotive systems. However, this increases the electromagnetic interference that affects electronic components in and the performance of automotive systems, making it more difficult to satisfy the standard of electromagnetic compatibility and electromagnetic issues. To solve the...
The influence of internal parameters on transfer and output characteristics of a Carbon Nanotube Field Effect Transistor are studied in this paper. For the purposes of the study a CNTFET compact model is used. The compact CNTFET model is coded in Verilog-A and it is simulated in Cadence Spectre circuit simulator. In particular, we have examined how the transfer and output characteristics are altering...
Mutual couplings between EMI filter components are of key concern when designing EMI filters for EMI attenuation in high frequency range. To reduce the parasitic couplings and improve EMI attenuation conductive shields can be placed between the components. This paper presents modeling and measurements of EMI filters with copper shields placed between the filter components. 3D electromagnetic field...
Bidirectional DC-DC converters play a very important role in energy storage systems. High voltage conversion ratio, high efficiency and economy are challenging issues for the research and development of advanced bidirectional DC-DC converters. In this paper, the modeling and control of a new non-isolated high step-up/down bidirectional DC-DC converter is studied. This converter is a combination of...
The stringent requirements on both the control bandwidth and the supply standby current make it tough to design the IC controllers for the v-core converters in future computer applications. The effects of the non-ideal characteristics of the finite gain-bandwidth product and non-zero output impedance of an operational amplifier (OP) are investigated for such a purpose. The results show surprising...
In this paper, a physics-based compact model is reported that captures the kink-effect observed in S22 for AlGaN/GaN HEMTs. The presence of this kink in the Smith-plot of S22 severely affects the design of the output matching network for amplifiers based on these devices which calls for a precise consideration of this effect. The kink-effect originates due to the ambivalent nature of the output impedance...
Pulsed power thyristors have been widely used in pulsed power systems due to their controllability, large through-flow capacity and high repetition frequency. To study the device's electrical characteristics and the circuit transient process, based on research of reverse recovery process of pulse thyristor, a macro model of pulsed power thyristor applying to MATLAB/Simulink software platform was established...
Core vias found in the packages of high-speed ICs can have a large impact on overall channel performance. Thus accurately modeling core vias in the package is essential. In this paper analytical methodologies are used to calculate equivalent circuit models of core vias.
This paper presents a lumped and distributed element models for dual-band (f1/f2) with harmonic suppression (HS) ±90° unit module. At first, the lumped and distributed element models for the dual-band (2.45/5.2-GHz) unit module are constructed. Then, the scattering parameter responses of the unit models are simulated and compared by using general microwave circuit software, such as Agilent ADS™ etc...
In this article, we provide an overview of the applications of ANN to efficient behavioral modeling of PA with short and long term memory effects. Summary of various PA memory effect modeling techniques including dynamic neural networks (DNN) and recurrent neural networks (RNN) are discussed. These techniques extract slow-changing signals from the inputs and outputs of the PA and use these signals...
The paper presents a simplified method for modelling non-linearity of the magnetic circuit of the power transformer. The saturation effect is implemented by describing the self and mutual inductances as a function of the magnetic flux. The most important element of this function is the saturation coefficient which is calculated based on transient state during the unloaded transformer switch on. The...
A novel nonvolatile memory technology is needed to meet the increasing demand of large storage elements. Spintronic memristor is a promising candidate for emerging memory technologies. The spintronic memristor combines the non-volatility advantage of memristors, the good scalability, and radiation hardness of spin-transfer torque magnetic random access memories (STT-MRAMs). In this paper, a modified...
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