Patents Examined by Steohen E. Jones
  • Circuit board with return path separated low crosstalk via transition structure
    Patent number: 10375822
    Abstract: Various circuit boards and systems are disclosed. In one aspect a system includes a circuit board and n differential signal via pairs. Each of the n differential signal via pairs has a first signal via and a second signal via and an electrical wall between the first signal via and the second signal via. There is a midline between every two adjacent differential via pairs. There are n ground return path vias. Each of the n ground return path vias is positioned substantially along one of the midlines and not on one of the electrical walls.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: August 6, 2019
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Yuan Li, James R. Foppiano, Jonathan P. Dowling, Gerald J. Merits, Manjunath Shivappa, Wasim I. Ullah, Claude Hilbert