Abstract: Along with the increasing demand on improving power quality i.e generally defined as any change in power (voltage, current, or frequency) that interferes with the normal operation of electrical equipment, the most popular technique that has been used is Active Power Filter (APF); This is because Passive filters performance is limited to a few harmonics and they can introduce resonance...

The nonlinear load such as UPS, fan controller, mobile charger is distorting the supply current waveform. This current harmonics derates the power system equipment. To avoid this current harmonics, filters namely passive filter / active filter /hybrid filters are introduced in the supply line. In this paper the overall view of the performance of the various filters are studied and the performan...

This paper introduces some results, obtained by experiments with evolutionary algorithms in synthesis of passive LC filters. The aim of the presented experiments was to verify, if heuristic algorithms were able to successfully solve filter design problem including some optimization requirements in the mathematical program environment. As shown in some examples, MAPLE program seems to be a conve...

We briefly introduce the source and harm of aircraft grid harmonic and summarise the common methods of harmonic reduction, such as passive filter, multi-pulse rectifier, power factor correction and active power filter. Then we introduce the disadvantages of the above methods, analyse the application status, advantages and deficiencies of active power filter in aircraft grid harmonic reduction, ...

Unfortunately, most of the articles and books written about designing the Loop Filter for PLL synthesizers dwell in the theoretical and try to cover the subject for all cases of PLL synthesizer design. This article will consider the design of a simple passive three-pole Loop Filter typically used in low voltage, low operating bandwidth synthesizer applications. This approach will simplify and d...

A new multi function voltage-mode universal biquadratic filter using single Voltage Differencing Differential Input Buffered Amplifier (VD-DIBA), two capacitors and one resistor is proposed. The proposed configuration has four inputs and one output and can realize all the five standard filters from the same circuit configuration. The presented biquad filter offers low active and passive sensiti...

This paper aims to discuss the filter structures which constitutes a planar inductor, capacitors using microstrip lines and make it tunable taking the advantage of LTCC multilayer design. Investigations of passive multilayer filter structure using low-temperature co-fired ceramic (LTCC) for microwave and radio frequency application is studied. A roadmap for performance and process parameters to...

In this paper, a novel single-input three-output (SITO) second-order multifunction active voltage filter with high-input impedance is proposed. The proposed circuit is based on using the recently reported active building block, namely differential difference current conveyor transconductance amplifier (DDCCTA). It employs one DDCCTA as active element together with one grounded resistor and two ...

A fully differential R-MOSFET-C fourthorder Bessel active lowpass filter employing passive resistors and . cuirent-steering MOS transistors as a variable resistor is proposed. The implementation relies on the tunability of the current-steering MOS transistors operating in triode region which counteract the concert deviation of resistance in integrated circuit manufacturing technology in order t...