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This paper explores the possibility of utilizing the signature characteristics of a Memristor to obtain sustained low frequency oscillations from conventional oscillators. The case example considered in this work is a typical opamp-based third-order quadrature oscillator. It is demonstrated that the use of a Memristor instead of a resistor leads to improved oscillator characteristics. Specifically,...
Maximum power point tracking (MPPT) is required to extract the maximum available power in PV systems. Wide variety of methods exist in literature, with range of complexity and effectiveness. The features of these diverse methods are usually evaluated at specific environmental conditions for a tiny period, and then the evaluations are generalized for PV systems working under long-term environmental...
Recently, an efficient damped pseudo transient analysis method was proposed to find DC solutions for nonlinear circuits. However, the simulation efficiency is still not satisfactory. In this paper, for different kinds of circuits, we get some groups of PTRAN algorithm control parameters values by using a parameter optimization algorithm for pseudo-transient analysis to obtain higher efficiency during...
In this work a model of the oscillator with inductive coupling of the gates operating at ultralow voltage is presented and experimentally verified. The topology needs a bias voltage at the gates, and we propose a circuit called starting block to generate this voltage from the supply. Theoretical behavior is compared with experimental results, showing good agreement. The circuit, which behaves as astable...
In high-power converters based on SiC-MOSFET half-bridge modules, laminated busbar plays a critical role in linking the DC capacitor bank to power modules. The busbar stray capacitance has the same order of magnitude with drain-source capacitance of SiC-MOSFET and has a great impact on the turn-off voltage oscillation of SiC-MOSFET. In this paper, parasitic elements of a three-layer laminated busbar...
The paper presents an original concept for interfacing of tensoresistive and capacitive force sensors with applications in modern microelectronics systems. In the first part, the authors show the results and conclusions of a PSPICE simulation for an original patented circuit. The used simulations models were introduced in some circuit components corresponding to the realistic behavior implementation...
For the excellent electrical performance, Gallium Nitride (GaN) new-type semiconductor devices are preferred in high voltage, high frequency and high power applications. However, GaN devices have low on-resistance and the loop layout requires low damping in high frequency loop. These both can lead to voltage and current oscillations under high frequency and even cause uncontrollable oscillations,...
SiC-MOSFETs have attracting increasing attention because of their outstanding characteristics that contributes to high efficiency and high power density of power converters. However, compared to conventional Si-IGBTs, SiC-MOSFETs are susceptible to false triggering, because they tend to generate large switching noise due to ultrafast switching capability and have a lower threshold voltage in high...
Silicon carbide (SiC) MOSFETs have been widely studied in high frequency applications. The switching performance, however, is limited with the existence of the parasitic elements. One critical issue is the susceptibility of the gate-source voltage to the parasitic elements, rendering the possibility of spurious operation of the SiC MOSFETs. This paper conducts comprehensive investigations on the impact...
In this work, a simple electric circuit model for the evaluation of the impact of vias (inter-metallic vertical connections) in resonant rotary traveling wave oscillator (RTWO) is proposed. A test structure was designed to quantify the degradation on the signal integrity of RTWOs caused by these vias. The test structure and the RTWO were designed according to the rules of the 130 nm commercial mixed...
Soft-switching self-tuning H-bridge converters for inductive power transfer (IPT) systems with resonant current regulation are introduced. The proposed converters are controlled based on an amplitude modulation technique for resonant converters to regulate the transferred power in an IPT system. The switching operations of the converters are synchronized to the resonance current of the IPT system...
Research on direct current (dc) interruption has grown in recent years, driven by increased interest in using high voltage direct current (HVDC) for large power transmission and future grids. In fact, dc interruption poses particular challenges to protection devices and circuit breakers and new technologies are needed to meet the requirements of future HVDC grids. In this paper we review some of the...
In this work we present the realization of a hybrid model (hardware-software) for memristors based on the nonlinear dopant model for three window functions: Strukov, Joglekar and Prodromakis. Proposing a methodology that allows us to design nonlinear analog circuits with memristors in an easier and faster way using the tools of Simulink, Simscape and System Generator. In addition, we tested the functionality...
Due to with the actuality of the task of interconnection of non-synchronously operating alternating current energy systems, an experimental comparison of the interconnection devices models, which implement various methods of operation of these devices, is required. Therefore, a stand is needed, that allows conducting experimental studies with the specified models of devices. The basis of the stand...
This paper aims toward joining the ideas of OBT (oscillation-based testing) and DFT (design for testability). It gives insight into an optimization process that provides testability if one chooses to use the OBT. The optimization procedure is exemplified on a timer device NE555. Utilization of a timer circuit allows avoidance of a specific design of the feed-back loop. The optimization procedure is...
The transient interruption characteristics and reignition conditions of direct-current (DC) forced current zero for vacuum interrupters in 270 V power-supply systems are discussed. Three stages are identified in forced interruption: DC arcing stage, current commutation stage, and voltage recovery stage. During the current commutation stage, the reverse peak current coefficient k, which is a key design...
Physical and electromagnetic modelling of double barriers InGaAs/AlAs resonant tunneling diode has been carried out using 9 μm2 mesa devices with a peak current density of 1.2 mA/μm2 integrated with a coplanar waveguide resonator. A 100 GHz oscillator was realized and achieved an output power of 100 μW through exploiting the negative differential resistance feature of the diode. Validation of the...
We develop new power device models that express the waveforms of power devices by functions. These models are described with VHDL-AMS, which is a hardware description language. The developed model can accurately reproduce the diode recovery waveforms calculated by the TCAD model in the same time as when using the SPICE model.
The article is devoted to experimental studies and modeling of the fluctuations of analog-to-digital converter for dynamic authentication of computational devices. Modelling of phase trajectories of the fluctuation spectrum is made using the oscillator model. Phase portraits parameters allow to perform computer authentication. Temporary structures in the spectrum of the fluctuations are recorded experimentally.
In wireless communication systems oscillators are basic components in the transmitter and receiver unit. However, the design process of an oscillator is very challenging. At first, an appropriate topology has to be selected and then the circuit has to be dimensioned. For this purpose, a high dimensional design space has to be considered in order to meet given specifications. Usually this design step...
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