Electrical computers and digital data processing systems: input/ – Intrasystem connection – Bus access regulation
Patent
1997-12-05
2000-03-28
Sheikh, Ayaz R.
Electrical computers and digital data processing systems: input/
Intrasystem connection
Bus access regulation
307 85, G06F 126
Patent
active
06044424&
ABSTRACT:
A system and method for minimizing disruption of operating power in a high-availability computer as new power supplies are hot-inserted. In the preferred embodiment, the high-availability computer includes a plurality hot-plug power supplies, a logic circuit system, and a power distribution system for distributing operating power from the power supplies to the logic circuit system. Preferably, the output capacitance of each power supply is significantly less than the total capacitance of the logic circuit system and the power distribution system, such that, as each power supply is hot-inserted into the computer, only a minute amount of electric charges will be transferred from the power distribution system and the logic circuit system to the power supply. As a small amount of charge transfer would generate only a small voltage drop, any glitch produced by hot-insertion would be significantly reduced. In order to compensate for an increased glitch recovery time attributable to the increased capacitance, the power supply of the present invention may use a poly-phase voltage regulator. Further, the computer system of the present invention may include a timer for indicating to the service person that the power supply of the present invention has been successfully installed on an operating computer.
REFERENCES:
patent: 5272584 (1993-12-01), Austruy et al.
patent: 5376831 (1994-12-01), Chen
patent: 5675467 (1997-10-01), Nishimura et al.
patent: 5714809 (1998-02-01), Clemo
patent: 5774315 (1998-06-01), Mussenden
Sheikh Ayaz R.
Silicon Graphics Inc.
Wiley David A.
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