An case in point can be the above mentioned schematic with the popular-method choke and pair of capacitors connected to an op-amp. The transfer perform from the amplifier can then be adjusted by adding reactive aspects on the responses loop, Even though Be careful for the stability of this type https://trentonvgviv.techionblog.com/31204471/5-easy-facts-about-single-phase-emi-emc-line-filter-described