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To extend the concept of the memristive systems to capacitive systems, memcapacitive systems have been described in 2009. Memcapacitors which are a subset of memcapacitive systems are flux-dependent nonlinear circuit elements with memory. Materials with memcapacitive properties has already been reported in literature. The elusive memcapacitor show promise for new type of applications because of their...
In this paper, a novel approach for generating multi-double-scroll attractors(MDSA) without changing the original nonlinear functions is presented. By using the multi-level-logic pulse excitation technique in double scroll chaotic systems, MDSA can be generated. Furthermore, the corresponding realization circuits are designed. The Pspice results are in agreement with numerical simulation results,...
An integrator circuit is presented in this paper that has used Differntial Difference Current Conveyor Transconductance Amplifier (DDCCTA). It has one DDCCTA and one passive component. It has been realized only with first order low pass response. The operation of the circuit has been observed and enforced at a supply voltage of ± 1.8V (bias current 50pA) using cadence and the model parameters of gpdk...
In this paper, a novel model for accurately evaluating the performance behaviour of subharmonic self-oscillating mixers (SOM) is presented. This model permits to investigate on the effects of various design parameters of SOMs namely in terms of conversion gain, IF frequency, noise figure, and intermodulation distortion. Such an accurate model is specifically important in the design of millimeter-wave...
Oscillation based testing (OBT) has proven to be a simple yet effective VLSI test for numerous circuit types. In this work, OBT is applied to test Second-generation Current Conveyor (CCII) based filters for the first time. Adopting a CCII-based band pass filter as a case study, it is shown that OBT can be implemented with a minimally intrusive switched feedback loop to establish the oscillator. Exhaustive...
Wayside energy storage systems (ESSs) in DC-electrified railway are recently studied as one of methods to save regenerative brake energy. Voltage basis control method to regulate the filter capacitor (FC) voltage in order to increase the assisting and absorbing power was developed. The voltage controller gain in this method should be set high for more energy-saving effect. However, it causes sometimes...
This paper addresses mainly to the analysis of the emerging memristor-based oscillators. This novel oscillator, unable to be expressed in the form of the feedback system, cannot be analyzed using the conventional Barkhausen criterion. Here we propose an oscillation condition analysis method based on Hopf bifurcation theory, in which we introduce the first Lyapunov coefficient to determine whether...
In recent years, applications of ultracapacitor in electrical systems have witnessed a rise due to their high power density. Ultracapacitors are known to possess inherent nonlinear dynamics with long term memory, which can be better, described using fractional calculus. This article addresses possible application of ultracapacitors for the design of very low frequency (VLF) oscillators. The presence...
In the paper a deterministic chaos oscillator based on a bipolar and field-effect transistor structure with negative resistance is proposed and examined. A modified mathematical model of Anishchenko-Astakhov is proposed for describing the chaotic oscillation dynamics. The results of mathematical modelling and experimental research are obtained.
At Maximum power point tracking for photovoltaic power generation system technology, this paper explains the principles of photovoltaic power generation and the establishment of mathematical models. Combined with solar photovoltaic array output characteristics and principle of traditional P&O method, analyses of oscillation and misjudgment issues in P&O method are done. Improved variable step...
The article is devoted to modeling phase portraits of the noise of electronic devices. Analysis of the noise temporal characteristics confirms their fractal nature. Parameters of phase portraits of spectral noise components give the chance the electronic devices authentication. Oscillator model makes it possible to estimate the parameters of phase portraits.
In this study, we investigate synchronization in complex network with two hubs by using parametrically excited van der Pol oscillators with parameter mismatch. By means of computer simulation, we confirm various change of synchronization probability in complex network, and observe effects on synchronization probability by changing structural metrics (degree and path length) in subset of the nodes...
This paper presents an original approach to estimate the accuracy of numerical algorithms of transient analysis for four test problems. The tests are presented as mathematical models and electronic circuits too. Test problems and methods of estimation of numerical analysis algorithms' accuracy proposed in the present paper can be used in circuit simulators and in computer mathematics programs to test...
The physical radiated emission sources and main radiated structures of a Boost converter are identified according to equivalent radiation antenna in this paper. The turn-off voltage of MOSFET and the recovery current of diode are found as the sources for their oscillation frequencies are coincidence with radiation curve measured. The influence of the converter's metal enclosure is analyzed on two...
This paper explains a procedure on how to select resonant circuit components of a unique direct three-phase to single-phase AC/AC converter for a contactless electric vehicle (EV) charger. The topology has a fewer bi-directional switches than a matrix converter and consists of a resonant circuit to utilize a zero-current switching (ZCS) mechanism. The selection goal was to realize a working prototype...
Oscillations in power electronic circuits with fast switching semiconductors are commonly known and the corresponding parasitic elements have been investigated in multiple literature. However, this paper investigates the triggering of these electromagnetic interference (EMI)-critical oscillations. An analytical description is derived using a boost converter circuit. Based on this description an optimization...
This paper presents a computational analysis, by means of a compact model, of the electric response of an Ovonic Threshold-Switch device embedded in a circuit subjected to an oscillatory bias.
This paper introduces the design results of RF circuit system for use in a W-band Extended Interaction Oscillator (EIO). And the EIO can produce a continuous wave power of over 100 W, whose operating voltage is 11 kV with a beam current of 0.15 A. The RF system design adopts 2g operating mode, trapezoidal slow wave structure with dual coupling slots and a period of 24. Considering the power loss caused...
To date, a family of series-connected boost converter (SCBC) with enhanced efficiency has been presented as the front-end dc/dc stage of distributed photovoltaic (PV) inverter, which suffers the severe PV voltage/power oscillation when operated under unbalanced grid voltage condition. This paper proposes an operational scheme to enhance the performance of one type SCBC, namely the dual-input central...
SiC MOSFETs are known to provide a better performance compared to Si IGBTs. However, they can also introduce undesirable behaviors like switching oscillations due to the existence of parasitic elements. In this paper, we introduce the turn-on and turn-off switching equivalent circuit models and validate these models with commercially available SiC MOSFETs. Based on the models, theoretical analysis...
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