The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 2015
Filed:
Jan. 06, 2011
Masanao Yoneya, Hadano, JP;
Kazunori Nakajima, Sagamihara, JP;
Naohiro Sezaki, Ebina, JP;
Kenji Kashiwagi, Minamiashigara, JP;
Akio Ikeya, Hiratsuka, JP;
Masanao Yoneya, Hadano, JP;
Kazunori Nakajima, Sagamihara, JP;
Naohiro Sezaki, Ebina, JP;
Kenji Kashiwagi, Minamiashigara, JP;
Akio Ikeya, Hiratsuka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
There is provided a printed circuit board having a differential signal transmission line composed of non-skew-adjusting portions and skew-adjusting portions. The non-skew-adjusting portion consists of parallel conductive traces spaced apart by a spacing. The skew-adjusting portion consists of a pair of meander traces for the skew adjustment. The skew-adjusting portion include convex transmission line segments and concave transmission line segments. The convex transmission line segment has parallel traces having a differential trace pair spacing greater than the differential trace pair spacing in the non-skew-adjusting portion. The concave transmission line segment has parallel traces having a differential trace pair spacing smaller than the differential trace pair spacing in the non-skew-adjusting portion.