Patents by Inventor Masanao YONEYA

Masanao YONEYA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Different signal transmission line for printed circuit board
    Patent number: 9024196
    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.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: May 5, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Masanao Yoneya, Kazunori Nakajima, Naohiro Sezaki, Kenji Kashiwagi, Akio Ikeya
  • PRINTED CIRCUIT BOARD
    Publication number: 20110203834
    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.
    Type: Application
    Filed: January 6, 2011
    Publication date: August 25, 2011
    Applicant: HITACHI, LTD.
    Inventors: Masanao YONEYA, Kazunori NAKAJIMA, Naohiro SEZAKI, Kenji KASHIWAGI, Akio IKEYA