A new method of designing continuous-time monolithic filters derived from well known voltage controlled oscillators (VCOs) is introduced. These VCOderived filters are capable of operating at very high frequencies in standard CMOS processes. Prototype lowpass and band-pass filter designed in a TSMC 0.25 μm process are discussed. Simulation results for the low-pass filter designed for a cutoff fr...

-This paper introduces a general mixed integer linear programming (MILP) model for determining the switching angles of non-uniform step asymmetric cascaded multilevel inverters (CMLIs) that minimize the undesired harmonics values. The proposed model could be applied as well for uniform step asymmetric CMLIs. The model is applied first to compare two 21-level asymmetric CMLIs : one is uniform st...

This paper presents the implementation of Single Phase 7 level Multilevel DC link (MLDCL) Inverter with Half Bridge Cell topology. For N level inverter, (N-1)/2 half bridge cells are required with the same number of voltage sources. In this inverter topology, 3 Half Bridge Cells are used along with 3 voltage sources, each have 100V DC. These half bridges are connected in series to form a Multil...

Metalorganic chemical vapor deposition (MOCVD) was used to deposit epitaxial BaTiO 3 thin films on (100) MgO substrates at 600'C. The metalorganic precursors employed in the deposition experiments were hydrated Ba(thd)2 (thd = CIIH190 2) and titanium isopropoxide. The films were analyzed by means of transmittance spectroscopy, wavelength dispersive x-ray spectrometry, secondary ion mass spectro...

A bridgeless single phase ac-dc rectifier based Cuk derived converter topology fed BLDC motor is proposed to improvepower factor at the AC mains near to the unity with low THD for PFC applications. It utilizes one control signal over the whole line cycle. In addition, the proposed converter exhibits low inrush current and low magnetic emissions as classical Cuk topology. The partial elimination...

Department of Electrical Power and Machines Faculty of Engineering Cairo University Giza, Egypt Abstract The quality of the current waveform generated by a current controlled, voltage source shunt active power filter depends basically on three factors: (i) The reference signal being generated; (ii) the modulation method used and (iii) the switching frequency of the PWM modulator. A new adaptiv...

<p>This study presents the power quality issue mainly focus effect of total harmonic distortion (THD) on a grid-connected PV system. Firstly, system with single-phase single-stage has been developed to monitor output values voltage and current also its behaviours. Maximum point tracking (MPPT) was implemented since it is proven as first step for THD reduction because MPPT will extract max...

The single phase inverter performance through the unipolar and bipolar strategies has been previously analyzed based on constant switching frequency pulse width modulation (CSFPWM). However, confined band variable PWM (CB-VSFPWM) is currently proposed as a new technique strategy to facilitate design of high order filter, reduce losses, current total harmonics distortion (THD) well. To evaluate ...

In this paper, a comparative analysis of Total Harmonic Distortion (THD) between wind farms with double-fed induction generators (DFIG) and synchronous permanent magnet (PMSG) integrated into the grid is developed. The Fast Fourier Transform (FFT) technique to evaluate output current signal THD in different fault conditions indicate best performance among used. generation problems are associate...