An LC filter arrangement includes a filter capacitor that connects the first output terminal to the second output terminal, a magnetic core, and a choke having a plurality of turns surrounding the magnetic core, and a first choke terminal and a second choke terminal. Each of the turns is formed by a separate conductor segment, at least partially surrounding the magnetic core. The LC filter arrangement is mounted on a circuit board and is electrically connected to a conductor track of the circuit board.

A transmission line includes three wires formed on a substrate. Each of the transmission lines transmits a three-level signal. A common-mode choke coil is inserted into the transmission line. The common-mode choke coil includes three coils coupled to one another and three pairs of outer electrodes, each of the three pairs being connected to the corresponding two ends of the coils. The outer electrodes of the common-mode choke coil are connected to the transmission line such that the three coils are serially inserted into the respective three wires.

A filter component assembly kit includes a bobbin that is configured with first and second members and a core that is in a quadrangular frame shape. When the first member is assembled with the second member, a through hole is formed in the bobbin. The through hole extends in a first direction. The core is configured with first and second extension bars. The first and second extension bars extend in parallel in the first direction. When the first extension bar is disposed in the through hole of the bobbin, rotation of the core around the first extension bar is prevented. First allowance of the first extension bar in a second direction, which is perpendicular to the first direction, in the through hole is larger than second allowance of the first extension bar in a third direction, which is perpendicular to the first and second directions, in the through hole.

An electromagnetic interference (EMI) suppression circuit is interposed between an AC source and a DC power conversion system. The EMI suppression circuit includes a pi-type filter network having first and second filter input terminals and having first and second filter output terminals. The pi-type filter network includes a common mode choke and a differential mode choke between the input terminals and the output terminals. The pi-type filter network includes a first X-type capacitor across the first and second filter input terminals and includes a second X-type capacitor across the first and second filter output terminals. A first Y-type emission reduction capacitor is connected between the first filter input terminal and earth ground. At least a second Y-type emission reduction capacitor and a damping resistor are connected in series to form a series resistor-capacitor combination between the first filter output terminal and earth ground.

A common mode noise filter includes a laminated body including first to fourth insulating layers stacked on one another, first to fourth coil conductors spirally extending and disposed on upper surfaces of the first to fourth insulating layers, respectively, a first via-electrode connecting the first coil conductor to the second coil conductor, a second via-electrode connecting the third coil conductor to the fourth coil conductor, first and second connection parts connecting the first via-electrode to first and second inner ends of the first and second coil conductors, respectively, and third and fourth connection parts connecting the second via-electrode to third and fourth inner ends of the third and fourth coil conductors, respectively. The first connection part overlaps the second connection part when viewed from above. The third connection part overlaps the fourth connection part when viewed from above. The common mode noise filter is operable in high frequencies.

A positive electrode side input loop line (10a) and a positive electrode side output loop line (10b), and a negative electrode side input loop line (11a) and a negative electrode side output loop line (11b) form two sets of coupling loops, and the loop lines of the two sets have the same winding direction, and have the same loop sizes of and relative relationship between the loop lines. A capacitor (3) is connected in series between the positive electrode side input loop line (10a) and the negative electrode side input loop line (11a).

An active compensation circuit is disclosed. In an embodiment a circuit includes a first compensation stage and at least one other compensation stage, wherein each of the first compensation stage and the at least one other compensation stage includes a sensor configured to provide a sensor signal being representative of a current flowing in one or more phases, a controlled current sink configured to supply a compensation current as a function of the sensor signal and an active amplifier element configured to provide a frequency response of an open circuit voltage amplification and/or is to supply a maximal output current, wherein the frequency response differs from a frequency response of at least one other active amplifier and/or wherein the maximal output current differs from a maximal output current of at least one other active amplifier.

A filter for electromagnetic noise comprising: a printed circuit board (5) having conductor tracks, having a first side and having a second side opposite the first side; a first busbar (1), which is secured on the first side of the printed circuit board (5) and is electrically connected to at least one of the conductor tracks; and a second busbar (2), which is secured on the second side of the printed circuit board (5) and is electrically connected to at least one of the conductor tracks. The printed circuit board (5) is arranged between the first busbar (1) and the second busbar (2) for the insulation thereof.

Provided are a device, a differential signal line processing method and a differential signal line processing apparatus. The device includes a first component and a second component; the first component and the second component perform signal transmission via multiple sets of differential signal lines; the device further includes at least one common-mode filter, each common-mode filter of the at least one common-mode filter being serially connected between the first component and the second component via one set of differential signal lines, and a group delay of the each common-mode filter being adopted for adjusting a delay of signal transmission on the one set of differential signal lines connected to the common-mode filter.

To improve the performance of the voltage filter. Rather than reducing an area of a region surrounded by a closed loop formed in a voltage filter 12A, an induced electromotive force generated in the voltage filter 12A itself is reduced by forming a pair of a closed loop CA and a closed loop CB in which the directions of the generated induced electromotive forces are opposite to each other by making a wiring 100 (anode wiring) intersect a wiring 200 (cathode wiring).