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Browse Prior Art Database

Multi-point Grounding in Two Storied Logic Card Systems

IP.com Disclosure Number: IPCOM000109870D
Original Publication Date: 1992-Sep-01
Included in the Prior Art Database: 2005-Mar-24
Document File: 1 page(s) / 27K

Publishing Venue

IBM

Related People

Eguchi, T: AUTHOR [+3]

Abstract

Disclosed is a technique to reduce an electro-magnetic interface, to increase a noise margin on electrical signals, and to increase mechanical strength in fixing daughter cards in two-storied logic card systems. In the technique, additional connectors between the card and its daughter card are used both as a grounding point and as a spacer.

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Multi-point Grounding in Two Storied Logic Card Systems

       Disclosed is a technique to reduce an electro-magnetic
interface, to increase a noise margin on electrical signals, and to
increase mechanical strength in fixing daughter cards in two-storied
logic card systems.  In the technique, additional connectors between
the card and its daughter card are used both as a grounding point and
as a spacer.

      The figure shows a two-storied logic card system and how it is
built in accordance with the technique.  The logic card system
includes a mother card 1, a daughter card 2, an electrical signal
connector 3, and additional grounding connectors 4, 5 which are
located near the farthest points from the electrical signal
connectors on the daughter card.  In this system, the ground levels
on theses cards get more stable and closer to each other, and the
daughter card is more securely supported.