Electrical transmission or interconnection systems – Plural supply circuits or sources
Patent
1991-02-26
1993-12-07
Pellinen, A. D.
Electrical transmission or interconnection systems
Plural supply circuits or sources
361 58, H01R 909
Patent
active
052685926
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.
REFERENCES:
patent: 3710197 (1973-01-01), Olds et al.
patent: 4079440 (1978-03-01), Ohnuma et al.
patent: 4200865 (1980-04-01), Morioka et al.
patent: 4245270 (1981-01-01), Busby
patent: 4454552 (1984-06-01), Barnes et al.
patent: 4510553 (1985-04-01), Faultersack
patent: 4574332 (1986-03-01), Calabro
patent: 4747783 (1988-05-01), Bellamy et al.
patent: 5028809 (1991-07-01), Watanabe et al.
IBM Technical Disclosure Bulletin, vol. 34, No. 4A, Sep. 1991, pp. 9-10, `Hot-Plug Circuit`.
Ellis, "Replacing a Power Supply Under Microprocessor Control in an Operating System", IBM Technical Disclosure Bulletin (IBM TDB), May 1985, pp. 7239.sub.]7241.
Badaoui et al., "Circuit Allowing Card Hot Plugging and Unplugging", IBM TDB, Nov. 1988, pp. 125-127.
Kisacky et al., "Charge Controller for Power-On Plugging and Unplugging of Electronic Components", IBM TDB, Aug. 1990, pp. 244-246.
Bellamy Paul D.
Takayesu Ted T.
Gonzalez Floyd A.
International Business Machines - Corporation
Kinnaman Jr. William A.
Krishnan Aditya
Pellinen A. D.
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