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In this paper, a voltage-mode universal biquadratic filter with high input impedance is presented. The proposed circuit has three input terminals and uses three differential voltage current conveyors (DVCCs), two grounded capacitors and two resistors. It can realize all the standard filter functions that are highpass, bandpass, lowpass, notch, and allpass filters by the adjustments of input voltage...
The paper presents a controller for an active filter to compensate reactive power and current harmonic distortion in a single phase system, i.e., to guarantee a power factor close to unity. The proposed controller considers the negative effects caused by the interaction between load and line impedances, which may lead to instabilities. In particular, the scheme provides a solution in the critical...
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