Circuit using choke coil and choke coil

Details Circuit using choke coil and choke coil Circuit using choke coil and choke coil

2006-10-03

2006-10-03

Mai, Anh (Department: 2832)

Inductor devices

Coil or coil turn supports or spacers

Coil on a preformed support or mount

C336S212000, C336S180000, C333S181000

Reexamination Certificate

active

07116203

ABSTRACT:
A first winding of a choke coil is closely wound in a single layer on the outer periphery of a substantially cylindrical body portion of a first bobbin. A second winding is closely wound in a single layer over the first winding. A third winding is closely wound in a single layer on the outer periphery of a substantially cylindrical body portion of a second bobbin. A fourth winding is closely wound in a single layer over the third winding. The first, second, third and fourth windings are wound so as to mutually strengthen magnetic fluxes when an in-phase noise current flows. The first and second windings are connected to a pair of signal lines via which differential transmission communication is performed and on which a power supply current is sent out. The third and fourth windings are connected to a pair of signal lines via which differential transmission communication is performed and on which the power supply current returns. Thus, a circuit including a compact choke coil having large inductance and better high-frequency characteristics, and the choke coil is provided.

REFERENCES:
patent: 5726611 (1998-03-01), Takagi et al.
patent: 5825259 (1998-10-01), Harpham
patent: 5831505 (1998-11-01), Yamaguchi et al.
patent: 6900717 (2005-05-01), Timashov et al.
patent: 4-4712 (1992-01-01), None
patent: 05-36821 (1993-05-01), None
patent: 10-261521 (1998-09-01), None
patent: 11-135330 (1999-05-01), None
patent: 2001-223117 (2001-08-01), None
patent: 2002-43148 (2002-02-01), None
Official Communication issued in the corresponding Japanese Patent Application No. 2002-380536, dated Apr. 25, 2006.

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