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The specific problems of the disconnection of HVDC breakers need an analysis of performances at laboratory scale. In the study of hybrid circuit breakers with commutation, three steps are necessary: modeling, simulation and experimental tests. The paper presents a modeling procedure for a hybrid commutation breaker intended to operate using resonant circuits phenomenon. Using the Matlab platform,...
A new cascadable first-order current-mode all-pass filter (FOCMAPF) consists of single active element namely, dual-X current conveyor transconductance amplifier (DXCCTA) and one capacitor is presented in this paper. The proposed filter offers the features of ease of cascading, electronic tuning of pole frequency, low sensitivities to the active components as well as to the passive component, low total...
We present in this paper a high-efficiency Class-E polar power amplifier (PA) with a novel digitally-controlled output matching network (OMN). The OMN varies the load impedance seen by the PA to modulate the amplitude of the output signal. It performs the modulation while simultaneously achieving a high power-efficiency by attaining an approximate zero-voltage-switching condition at the PA, and mitigating...
Due to the increasing energy demand there is a need of energy storage and advanced power conversion system. Energy which are available from the renewable energy sources can be efficiently store and can be convert to feed load as per the requirement. There are some power quality issues or poor voltage regulation where the load is supplied by renewable energy source. Therefore it is required to design...
A new class of nuclear quadrupole resonance (NQR) detector based on non-Foster circuits (NFCs) is introduced. NQR is a solid-state radio frequency spectroscopic technique, allowing the detection of different substances based on their spectral profiles. Recently, non-Foster circuits have received significant interest for broadband impedance matching of small antennas; this principle will be used to...
A novel dualband impedance transformer based on fractional-order inductor and capacitor is proposed in this paper. This transformer is designed to transfer the arbitrary frequency-dependent complex impedances sources to loads at two irrelevant frequencies with one fractional-order inductor and two fractional-order capacitors. Each fractional-order element has two parameters to be determined: the order...
A new galvanically isolated DC-DC converter has been presented in this paper. The proposed topology is based on the quasi-switched-boost impedance network. It not only includes all positive characteristics of previous converters including continuous input current, high boost ability and high efficiency, but also has the prominent features of less passive elements utilization, small size and light...
Digital discrete-time implementations of non-Foster circuit elements offer an alternative approach to the design of devices such as negative capacitors and negative inductors. However, practical implementations of high-speed digital non-Foster circuits are affected by latency and noise, where latency can arise from analog-to-digital conversion time and computation time. Thus, the present work explores...
This paper proposes a design to reduce the size of traditional stepped-impedance low-pass filters and a solution to the discontinuity problem encountered in the original design. In this design, the low-impedance sections of the traditional design are replaced by periodical structures with shunt elements. The structure itself features size reduction and the new characteristic impedance is made equal...
This paper presents a generic model that links the compensation techniques used in two-stage amplifiers to the structures of three-stage amplifiers. Many previous designs can be derived from this model, and new three-stage amplifiers can potentially be constructed. A novel three-stage amplifier based on this generic model is proposed. Simulation results show that the proposed design outperforms many...
A novel design of voltage-mode (VM) all-pass filter (APF) utilizing a single dual-X current conveyor (DXCCII) is proposed. Although many other voltage mode first-order APFs are available in literature, however majority of them cannot allow us to get high input impedance, low output impedance and grounded capacitor properties together. The proposed circuit offers these properties with reduced number...
In this paper the results of characterization and modelling of capacitors have been presented. The experimental results obtained using RF impedance analyzer have been discussed, and based on them, parameters of equivalent circuits have been determined using analytical model. Approximate functions for parasitic elements of the device have been proposed.
Digital discrete-time implementations of non-Foster circuit elements offer an alternative to conventional analog circuit approaches. In particular, the design of a discrete-time negative capacitor is investigated, since such non-Foster circuit elements offer significant potential in wideband antenna, metamaterial, and artificial magnetic conductor applications. As with analog non-Foster circuits,...
There is renewed interest in the use of non-Foster circuit elements in a variety of important applications such as wideband impedance matching and artificial magnetic conductors. Although non-Foster devices such as negative capacitors and negative inductors can be realized using current conveyors and Linvill circuits, a digital design approach may offer an important alternative in some applications...
In this paper, using newly introduced analog adder and subtractor circuits, a new negative impedance converter, a lossy inductor simulator and an all-pass filter structure are presented. The proposed configurations have very simple structures containing only one or two adder/subtractor blocks together also with one or two passive elements. All capacitors used are grounded which is beneficial from...
An inverter-based low-voltage current feedback amplifier (CFA) is proposed in the paper. The proposed current conveyor is based on an inverter-based low-voltage second-generation current conveyor (CCII) and an inverter-based buffer. There are no on-chip capacitors in the proposed current conveyor, and it can be designed with standard CMOS digital processes, hence will reduce the cost of chip fabrication...
This paper introduces concept of discrete control method of class E amplifier which keeps nominal operation for varying load resistance. In the proposed method, shunt capacitance and output resonant capacitance are varied electronically by setting status of switches which are connected to capacitances. Proposed method can keep nominal operation, i.e., ZVS and ZDS, both when load resistance is higher...
Electromagnetic Compatibility (EMC) filters for power electronic devices are strongly influenced by magnetic couplings between all components in the system. Therefore, several methods were proposed to predict these influences. Although a precise simulation can be realized utilizing the past methods, it is not practical to consider the all existing couplings especially for a development process in...
This article evaluates the characteristics of a proposed π-CLCL immittance converter, which is a combination of the typical π- and T-type configurations, for constant current output applications. The input-output characteristics and efficiency characteristics are analyzed experimentally. The experimental results are compared to the recently evaluated simulation results of the proposed immittance converter...
This paper deals with the use of the integrated circuit electromagnetic model (ICEM) to analyze, predict, and optimize auto compatibility and electromagnetic emission at PCB level. ICEM is currently under standardization process (IEC62014-3). The basic ICEM architecture is composed of a power distribution network model and an internal current source modeling digital activity. Such an approach enables...
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