Nec Tokin Corporation

Honda Electron Co., Ltd.

Fumishiro Tsuda

Toshiro Tojo

Toshiya Sato

Kazuya Sugawara

Toyomi Obikawa

Hideaki Yamauchi

Takashi Kaku

Masahiko Kunii

A modem coupling circuit comprising: (a) a transformerhaving a coreincluding a gap formed therein, primary windings N, Nconstituting a bifilar wound coil which is wound around the core, forming a single layer and connected to power lines L, L, and a secondary winding Nconnected to a transmitting circuitand a secondary winding Nconnected to a receiving circuit, the secondary windings N, Nholding the single layer of the primary windings between; (b) a coupling capacitor Cconnected to a middle point between first ends of the primary windings, the first ends being not connected to the power lines L, L; (c) current limiting resistances R, Rconnected to the primary windings N, Nhaving a bifilar construction; (d) drive resistances R, Rconnected to the secondary winding for transmission N; and (e) terminating resistances R, Rconnected to the secondary winding for reception N

Modem coupling circuit for power-line carrier

Line filter

Growing community of inventors

Sendai, Miyagi, Japan

Fumishiro Tsuda