Electricity: electrical systems and devices – Safety and protection of systems and devices – Voltage regulator protective circuits
Patent
1996-08-19
1998-06-30
Fleming, Fritz
Electricity: electrical systems and devices
Safety and protection of systems and devices
Voltage regulator protective circuits
361118, 323908, 307 86, 307 87, H02H 906
Patent
active
057743150
ABSTRACT:
A surge suppression circuit for gradually charging a capacitance of a device being hot plugged into a system, such as a disk drive being hot plugged into a RAID system. Without reliance on a permanently turned-on series element, such as a pass transistor, the surge suppression circuit uses a trigger circuit in combination with either a current limiting circuit or a slew rate control circuit. The current limiting circuit relies on a current sensing resistor in combination with a transistor that turns on when a voltage reaches a certain level across the current sensing resistor. The slew rate control circuit relies on a feedback mechanism that includes a capacitor and a resistor for maintaining a substantially constant rate of charging the capacitance of the device being hot plugged.
REFERENCES:
patent: 5155648 (1992-10-01), Gauthier
patent: 5272584 (1993-12-01), Austruy et al.
patent: 5587685 (1996-12-01), Johansson
Siliconix Inc., release in ECN Electronic Component News, vol. 40, No. 8, Aug. 1996.
Core Engineering, Inc.
Fleming Fritz
Sherry Michael
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