An instance could well be the above mentioned schematic with the widespread-manner choke and pair of capacitors connected to an op-amp. The transfer functionality from the amplifier can then be modified by adding reactive things to the suggestions loop, Whilst Be careful for the stability of such a active EMI https://kitesurfingboard32108.aboutyoublog.com/33381027/what-does-enerdoor-three-phase-filter-mean