An inductor device, a filter device, and a steering system. The inductor device includes first to third cores and first and second wires. The first core, a portion of the first wire passing through the first core, and a portion of the second wire passing through the first core are provided as a first inductor. The second core and another portion of the first wire passing through the second core are provided as a second inductor. The third core and another portion of the second wire passing through the third core are provided as a third inductor.

A filter unit is provided to retrofit within signal lines that couple analog cockpit gauges to transducers in rotorcraft systems. The filter unit may include a housing assembly and an electromagnetic interference (EMI) filter assembly housed therein. The filter assembly may include a printed circuit board (PCB) having conductive PCB traces and a signal line input connector configured to connect to multiple transducer signal lines. The filter assembly may also include a signal line output connector configured to connect to multiple analog cockpit gauge signal lines and a plurality of common mode chokes electrically connected between the signal line input connector and the signal line output connector. Each common mode choke may be positioned on the PCB so that it does not electrically/magnetically interfere with the other common mode chokes of the plurality of common mode chokes.

A Communication System includes a first power supply channel including a first impedance and a second impedance, and configured to transfer electrical power from a first power source to a first load. The first power supply channel is configured to electrically couple to the first power source via a first common mode choke. The communication system also includes a second power supply channel comprising a third impedance and a fourth impedance, and configured to transfer electrical power from a second power source to a second load. The second power supply channel is configured to electrically couple to the second power source via a second common mode choke. The communication system further includes a first transceiver comprising a first output pin electrically coupled to the first power supply channel and a second output pin electrically coupled to the second power supply channel at a first end of the communication system.

Disclosed herein is a common mode filter that includes a winding core part and first and second wires wound in a same direction around the winding core part. The first and second wires constitute a first winding block on one endmost side in an axial direction of the winding core part, a second winding block on other endmost side in the axial direction of the winding core part, and a third winding block positioned between the first and second winding blocks. The second winding block is a winding block at an odd-numbered position counted from the first winding block. The first and second wires cross each other in an area between the first and third winding blocks and in an area between the second and third winding blocks.

An ESD protection device includes a first terminal and a second terminal defining a first balanced port, a third terminal and a fourth terminal defining a second balanced port, and a ground terminal. A first coil and a third coil are provided between the first terminal and the third terminal to cancel an inductance component of a first ESD protection circuit. A second coil and a fourth coil are provided between the second terminal and the fourth terminal to cancel an inductance component of a second ESD protection circuit.

A transformer filter arrangement including a transformer having a first winding and a second winding is provided. Both of the first and the second windings are located between an outer border and an inner border, which is inside the outer border. The transformer filter arrangement further includes at least one reactive sub circuit, each including at least one inductor. The first winding of the transformer is divided into a plurality of winding segments. At least a first one of the at least one reactive sub circuit being connected in series with the winding segments of the first winding between two such winding segments, and having at least one of the at least one inductor located inside said inner border.

A transient noise reduction filter comprises a cable including one or more twisted pairs of conductors and one or more common mode chokes (CMCs). The one or more CMCs a formed from respective pluralities of turns of the cable. Each of the CMCs may be a magnetic CMC wherein the plurality of turns of the cable are wrapped around a magnetic core, or an air-core CMC wherein the plurality of turns of the cable are not wrapped around a magnetic core but are instead disposed around a non-magnetic material (such as air)

An electronic device includes an IC mounted on a substrate and a filter circuit connected to the IC. The filter circuit includes a coil component and a capacitor. The coil component includes a multilayer body, a first coil including a portion of multiple wiring patterns laminated in the multilayer body, a second coil provided on layers different from those of the first coil and including a portion of the multiple wiring patterns, and first, second and third electrodes provided on side surfaces. An opening of the first coil is at least partially overlapped with an opening of the second coil when viewed from a main surface direction. The third electrode is grounded via the capacitor. The first coil has an inductance lower than that of the second coil.

Disclosed herein is an electronic circuit module that includes a circuit board and a common mode filter mounted on the circuit board. The common mode filter includes first and second terminal electrodes constituting a first pair of terminal electrodes and third and fourth electrodes constituting a second pair of terminal electrodes. The circuit board includes: a first wiring layer having first, second, third, and fourth land patterns connected to the first, second, third, and fourth terminal electrodes, respectively, and first, second, third, and fourth wiring patterns connected to the first, second, third, and fourth land patterns, respectively; and a second wiring layer having a ground pattern that overlaps the first, second, third, and fourth wiring patterns without overlapping the first and second land patterns.

An electronic component includes a multilayer body, a primary coil including an n-number primary coil conductor layers and one series coil conductor layer, a secondary coil including an n-number secondary coil conductor layers, and a tertiary coil including an n-number tertiary coil conductor layers. The arrangement includes one primary coil conductor layer, one secondary coil conductor layer, and one tertiary coil conductor layer in this order from a first side to a second side of a laminating direction. The series coil conductor layer is electrically connected in series to the n-number primary coil conductor layers and is provided at the second side of the laminating direction with respect to the tertiary coil conductor layer closest to the second side of the laminating direction.