1. Active filter

2. No active filter

3. Method and active filter element for preventing the development of plants

4. An 8 - channel electroencephalogram ( EEG ) amplifier is designed based on instrumentation amplifier and universal active filter.

5. In one exemplary embodiment of the present invention, substantially all of the fluid flowing through the housing passes through the chemically active filter element.

6. This results in a hybrid filter for an alternating current network (6), whereby the active filter (4) is not subjected to fundamental frequency current component strain.

7. To verify the simulation approach, simulation results and experimental results of a shunt active filter for harmonic current compensation in a three-phase system are presented.

8. According to the invention, a filter (14) adjusted to the nominal frequency of the alternating current network (6) is mounted electrically parallel to the active filter (4).

9. This paper is focused on a shunt active filter based on detection of harmonic voltage to attenuate harmonic propagation in a power distribution network and its installation site selection.