active filter


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active filter

[′ak·tiv ′fil·tər]
(electronics)
A filter that uses an amplifier with conventional passive filter elements to provide a desired fixed or tunable pass or rejection characteristic.
References in periodicals archive ?
Improvement of the Time Domain Specifications of Dc Bus Voltage of Shunt Active Filter Using Controllers.
The essential scope of services includes: - ms switchgear as sf6 system, Ring feed; - transformers (1 000 kva); - nsvht for the supply of process drives in withdrawable design, Busbars rated current 2 500 a icw 80 ka - lv distribution with frequency converters; - active filter (harmonics); - ups system approx.
The THD value calculated for the computation has been compared with the output of Shunt Active filter installed after the detection to reduce the harmonics [1].
Derbel, "Optimization of a rail to rail low voltage CCII for active filter applications," in International Conference on Design and Technology of Integrated Systems in Nanoscale Era, DTIS'08, 2008.
com/AL/text/HB428/2017) House Bill 428 , would "prohibit the sale of a device that provides Internet access unless the device contains an active filter that blocks access to specified types of obscene material.
The trapezoidal strategy relies its operation on a discrete trapezoidal linear approximation that more accurately determines the switching of the active filter for the one-step ahead current sample, such that three significant advantages are potentially exhibited: first, the trapezoidal predictive controller slightly increments the processing time without affecting the switching of the power converter; second, in contrast to the typical Euler approximation used in other works [6,7,13-20], the trapezoidal method generates lower AC current ripple; and third, the convergence time and load operating performance are wider than those obtained using the typical predictive control strategy, which improves the reference current tracking and, therefore, the power quality.
It describes the importance of active power filters and solid-state devices and APF configurations and selection considerations; proportional-integral (PI) controller-based shunt active filter (SHAF) control strategies; type 1 fuzzy logic controller (FLC)-based SHAF control strategies with different fuzzy membership functions for extracting three-phase reference currents; type 2 FLC-based SHAF control strategies with different fuzzy membership functions; and real-time simulation.
A Digital Signal Processor Based Performance Evaluation of Three-phase Four-wire Shunt Active Filter for Harmonic Elimination, Reactive Power Compensation, and Balancing of Non- linear Loads under Non-ideal Mains Voltages.
And in December, TDK introduced the EPCOS LeaXield active filter module for the minimization of earth leakage currents in power drive systems with frequency converters (Figure 2).
Requiring mathematical and general electronics knowledge, the work discusses such topics as separating and managing AC and DC gain, transducer to analog-to-digital converter interfacing, active filter designs, op amps for radio frequency design, low voltage op amp circuits, design for extreme environments, and voltage regulation.
app's Spam Protection feature and the active filter rules are applied.
Every incoming call or text message is scanned by the app's Spam Protection feature and the active filter rules are applied.