Excitation of the discrete (surface-wave/plasmon propagation mode) and continuous (radiation modes) spectrum by a point current source in the vicinity of graphene is examined. The graphene is represented by an infinitesimally thin, local, and isotropic two-sided conductivity surface. The dynamic electric field due to the point source is obtained by complex-plane analysis of Sommerfeld integrals...

This paper analyses whether any differences in behaviour arise due to an induction motor being star or delta connected when supplied by a current source inverter. Two comparisons are considered. The first is that of a delta connected motor compared to a star connected motor of the same power and voltage ratings; the star connected motor in this case is then mathematically the delta connected mo...

A novel scheme for exciting VLF waves and injecting them in the magnetosphere is presented. The scheme is based on Cerenkov excitation of whistler and helicon waves in an altitude range of 80-95 kin. Contrary to the traditional Cerenkov excitation which relies on a charge moving at speeds ex•g the local phase velocity of the wave, the present scheme relies on currents moving transversely to its...

1. INTRODUCTION Recently, the studies on the scattering of electromagnetic waves by a cylindrically curved conducting open surface are becoming an important subject for a variety of applications [1]-[4]. When the geometrical ray or the creeping wave is incident on the edge of the cylindrically curved conducting open surface, the geometrical rays and the whispering gallery modes, which cling to ...

It is shown that an MOS weak-inversion differential pair can be linearized considerably by replacing the tail current source with a MOSFET biased in the weak-inversion triode region. Calculations show that the transconductance can be kept constant to within +5%/ 0% for input voltages up to 130 mV. This linearized differential pair is used in a third-order transconductance-C bandpass filter with...

Space vector control is popular for controlling motor drives or three-phase rectifiers since it offers reduced switching losses and better utilization of the DC bus compared to conventional PWM modulation. This report describes a space vector controller for a three-phase boost-type rectifier that is implemented in PLECS. The schematic diagram of the boost rectifier is shown in Fig. 1. The sourc...

This paper introduces a new reduced swing logic style called dynamic current mode logic (DyCML) that reduces both gate and interconnect power dissipation. DyCML circuits combine the advantages of MOS current mode logic (MCML) circuits with those of dynamic logic families to achieve high performance at a low-supply voltage with low-power dissipation. Unlike CML circuits, DyCML gates do not have ...

Current Source Inverter(CSI) has applications in the area of current protection. For CSI fed loads, when connected at a point of common coupling (PCC), the system voltage, may not always be a pure sinusoidal waveform, due to distortions created by other loads at the PCC. This paper presents two simple controllers, namely the comparator type and PI type, to derive and generate a constant current...

Conditioning a current source using OCCII-GIC for EIT systems Ali Zarafshani, Thomas Bach, Wei Wang and Chris Chatwin Instrumentation and Hardware, Bioelectrical Research Group, Engineering and Design, University of Sussex, England, BN19QT Sensatech Research, Brighton, England, BN2 0GP [email protected] Abstract: A multi-Frequency EIT has been developed to evaluate the permittivity spec...

A new current source for low-voltage applications is proposed. This current source is well suited for biasing differential pairs and source followers. Measured compliance voltage is slightly smaller than that of a single transistor. Its output resistance is a factor of 25 larger than that of a single transistor current source and was measured to be 8 M : The use of the new current source improv...