Hybrid filter circuit and system with hybrid filter circuit

A hybrid filter circuit for reducing common-mode interference signals at least with frequencies greater than or equal to 150 kHz in a power line with at least one phase, comprising

• at least one first passive filter stage and
• an active filter unit with at least one first active filter stage,
• wherein the hybrid filter circuit can be coupled to an electrical device on a load side via a load terminal and to a power grid on a supply side via a supply terminal, and the power grid and the electrical device are coupled directly or indirectly via the power line,
• wherein the first active filter stage comprises a sensor for measuring a common mode noise signal in the power line and a feedback unit with an active amplifier unit for generating a compensation signal counteracting the common mode noise signal, which is coupled into the power line via an output of the first active filter stage,
• wherein the at least one passive filter stage and the active filter circuit are arranged in cascade between the load terminal and the supply terminal.