Multi-stage precharging system to limit power supply transients

Details Multi-stage precharging system to limit power supply transients Multi-stage precharging system to limit power supply transients

1997-12-23

1999-06-01

Paladini, Albert W.

Electrical transmission or interconnection systems

Conductor arrangements or structure

361 58, 361111, 361788, 361791, 4399241, H02H 720

Patent

active

059090650

ABSTRACT:
A system for limiting power supply transients in a powered up backplane when a printed circuit (PC) board is plugged in. The PC board includes first connecting pins with different lengths connecting to precharge planes on the backplane where each sequentially longer pin length is connected to a precharge plane providing a sequentially lower voltage. The first connecting pins are further connected by precharge circuits to power planes on the PC board. The precharge circuits are configured to ramp current to minimize power supply transients. In one embodiment, the precharge circuits each include a transistor and RC circuit connecting each first connecting pin to a power plane on the PC board.

REFERENCES:
patent: 3993935 (1976-11-01), Phillips et al.
patent: 4079440 (1978-03-01), Ohnuma et al.
patent: 4245270 (1981-01-01), Busby
patent: 5210855 (1993-05-01), Bartol
patent: 5384492 (1995-01-01), Carlson et al.
patent: 5530810 (1996-06-01), Bowman
patent: 5726506 (1998-03-01), Wood

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