Sequential connector
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United States of America Patent
Stats
-
Dec 7, 1993
Grant Date -
N/A
app pub date -
Feb 26, 1991
filing date -
Feb 26, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A circuit for facilitating hot plugging by limiting the inrush current when a card is plugged into a board having plural card-receiving slots. A single MOSFET charging circuit for all of the cards is provided on the board for each voltage level supplied to the cards. Each card connector half has a staggered set of pins so that, upon insertion of a card, the following events occur in sequence (1) the card ground is connected to the board ground through a high-resistance path; (2) the card ground is connected to board ground through a low-resistance path and the MOSFET source is coupled to the card components; (3) the MOSFET gate is coupled through a card jumper to a bias supply; (4) the normal connection is made between the voltage supply and the card components; and (5) the connection to the card components from the MOSFET source is broken.
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Cited Art Landscape
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