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Bus bar bridged pc board for transitional termination of multiple cables and method

  • US 4,682,828 A
  • Filed: 12/06/1985
  • Issued: 07/28/1987
  • Est. Priority Date: 12/06/1985
  • Status: Expired due to Fees
First Claim
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1. A transitional printed circuit board for transitionally terminating four electrical transmission cables into a terminal connector, each of said cables including a plurality of ground wires and a plurality of signal wires, said transitional printed circuit board comprising;

  • a nonconductive substrate;

    a first electrical plane formed on a first side of said substrate;

    a second electrical plane formed on a second side of said substrate opposite the first side of said substrate, said substrate intermediate said first and second electrical planes forming an insulation layer between said electrical planes;

    said first electrical plane including;

    a generally U-shaped ground plane formed around peripheral edges of said substrate including a first ground plane section formed along a first peripheral edge, a second ground plane section formed along a second peripheral edge opposite said first peripheral edge, and a third ground plane section joining said first and second ground plane sections along a rear peripheral edge of said substrate;

    a first plurality of spaced electrically conductive lands in said first electrical plane spaced between said first and second ground plane sections;

    a second plurality of spaced electrically conductive lands included in said first electrical plane spaced forward of said first plurality of lands toward a connector edge of said printed circuit board;

    electrical trace means connecting said first and second plurality of electrically conductive lands in a desired pattern;

    a bus bar bridge including a ground bus bar spanning said electrical trace means in a manner in which said bus bar is out of electrical contact with said trace means to prevent shorting of electrical signals;

    a series of electrically conductive pads for making connection to a terminal connector disposed adjacent said connector edge of said printed circuit board; and

    a second plurality of electrical trace means connecting said second plurality of lands and said series of pads in a desired pattern for programmed termination; and

    said second electrical plane including;

    a generally U-shaped ground plane formed around peripheral edges of said substrate coextending generally with said ground plane of said first electrical plane including a first ground plane section formed along a first peripheral edge, a second ground plane section formed along a second peripheral edge opposite said first peripheral edge, and a third ground plane section joining said first and second ground plane sections along a rear peripheral edge of said substrate;

    a first plurality of spaced electrically conductive lands in said second electrical lane spaced between said first and second ground plane sections;

    a second plurality of spaced electrically conductive lands included in said second electrical plane forward of said first plurality of lands toward said connector side of said printed circuit board;

    electrical trace means connecting said first and second plurality of electrically conductive lands of said second electrical plane in a desired pattern;

    a bus bar bridge including a ground bus bar spanning said electrical trace means in said second electrical plane in a manner in which said bus bar is out of electrical contact with said trace means to prevent shorting of electrical signals;

    a series of electrically conductive pads included in said second electrical plane for making connection to a terminal connector disposed adjacent said connector side of said printed circuit board; and

    a second plurality of electrical trace means connecting said second plurality of lands and said series of pads in a desired pattern for programmed termination;

    a series of plated through holes formed in said substrate between said first and second electrical planes, a number of said plated through holes being connected to the lands of one of said electrical planes and to the termination pads of the other of said electrical planes.

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