Abstract: An electronic component such as a transformer or choke coil in which a coil is wound around the toroidal core to form a coil element which is completely encased in resin case. The inside of the case is partitioned by a plate so that the external terminals are fixed within terminal housing sections formed in four corners of the case and the toroidal core is fixed within a core housing section formed at the center of the case.

Abstract: The present invention relates to a balanced low-pass filter characterized in comprising a pair of input terminals and a pair of output terminals, wherein a pair of coils is connected in series in a negatively coupled manner between a first input terminal and a first output terminal and a pair of coils is connected in series in a negatively coupled manner between a second input terminal and a second output terminal, the connection point between each pair of coils and each end of each coil opposite to the connection point being connected across to the corresponding point of the corresponding pair of coils, with capacitors therebetween, and the coils being wound on the same bobbin in such a manner that each pair of negatively coupled coils is formed in adjacent winding portions.