| US 7,339,443 B2 | ||
| Common mode radiation inhibit circuit and electronic equipment | ||
| Hirotsugu Fusayasu, Kyoto (Japan); Shin-ichi Tanimoto, Kyoto (Japan); Seiji Hamada, Osaka (Japan); and Ryo Matsubara, Osaka (Japan) | ||
| Assigned to Matsushita Electric Industrial Co., Ltd., Osaka (Japan) | ||
| Filed on Dec. 05, 2005, as Appl. No. 11/294,031. | ||
| Claims priority of application No. 2004-353203 (JP), filed on Dec. 06, 2004. | ||
| Prior Publication US 2006/0119449 A1, Jun. 08, 2006 | ||
| Int. Cl. H04B 1/12 (2006.01) | ||
| U.S. Cl. 333—12 [333/24 R] | 19 Claims |
| 1. A common mode radiation inhibit circuit comprising:
a differential transmission line which is constituted of a pair of signal wiring, and transmits differential signals;
a signal ground of the differential transmission line which is arranged along the differential transmission line, and has
a change point on its way;
a transformer; and
a reference ground, wherein a primary side of the transformer is connected between an electric midpoint of the pair of signal
wiring, and the signal ground at one side of the front and back of the change point of the signal ground;
wherein the secondary side of the transformer is connected between the electric midpoint of the pair of signal wiring and
the signal ground at another side of the front and back of the change point of the signal ground; and
wherein the reference ground is connected to a point which becomes a neutral sheet of the primary side of the transformer
and a point which becomes a neutral sheet of the secondary side of the transformer.
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