Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1995-11-22
1996-12-24
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
361 58, 361110, 361111, 361118, 323908, 307 43, 327384, G05F 302
Patent
active
055876854
ABSTRACT:
Individual devices of a redundant array of independent devices (RAID) are coupled to an electrical power supply. For devices having widely varying load impedances, such as disks, incident with the coupling of electrical power thereto, the replacement or addition of a device in the system, while the system is in operation, causes unacceptable power transients in the power supply. To minimize such power transients, a transient suppression circuit is employed to isolate the load impedance of the device from the power supply. Isolation is achieved in the transient suppression circuit by employing an active circuit element, such as a MOSFET power transistor, as the power coupler. A capacitor controlled voltage divider circuit, incident with the coupling of electrical power thereto, couples a time varying gate voltage, which changes as a function of the rate of charge of the capacitor, to the MOSFET power transistor. This slowly increases MOSFET conduction, thereby providing controlled conductive coupling of the electrical load of the device to the power supply.
REFERENCES:
patent: 4233566 (1980-11-01), Nestorovic
patent: 4245270 (1981-01-01), Busby
patent: 4329705 (1982-05-01), Baker
patent: 4620272 (1986-10-01), Fulton et al.
patent: 5268592 (1993-12-01), Bellamy et al.
patent: 5283707 (1994-02-01), Conners et al.
patent: 5313358 (1994-05-01), Severinsky
patent: 5383081 (1995-01-01), Nishikawa
"Limiting Voltage & Current Transients On PCB Power Inputs" by Matthew Knight, pp. 002-005, Sep. 1994.
Technical Information "Increasing Reliability Of SMD Tantalum Capacitors In Low Impedance Applications" by David Mattingly, pp. 005-015, Sep. 1994.
Callahan Timothy P.
Hewlett--Packard Company
Wells Kenneth B.
LandOfFree
System for suppressing power transients when connecting a disk d does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for suppressing power transients when connecting a disk d, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for suppressing power transients when connecting a disk d will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1181151