Electrical computers and digital data processing systems: input/ – Intrasystem connection – Bus access regulation
Patent
1997-06-25
1999-07-06
Sheikh, Ayaz R.
Electrical computers and digital data processing systems: input/
Intrasystem connection
Bus access regulation
709301, G06F 1300
Patent
active
059192534
ABSTRACT:
An integrated circuit provides for an output driver having a quick turn-on characteristic as well as a maximum V.sub.OH level limited to the maximum SCSI specification limit. The output driver's V.sub.OH is controlled by a resistor divider network, connected between a pull-up signal source and a pull-up output device, and which functions to reduce the gate voltage on the output device such that its maximum V.sub.OH level is limited to the SCSI specification. The quick turn-on characteristic is implemented by coupling a transfer gate in parallel with the series resistor of the resistor divider network, and bypassing the series resistor during a first portion of the pull-up turn-on time of the output driver. A feedback circuit is connected between the output driver output and the transfer gate bypass circuit, in order to turn the transfer gate off when the output voltage reaches a particular trigger value, thus removing the bypass from the series resistor and allowing the resistor divider network to function normally and limit the output driver's pull-up to the maximum SCSI V.sub.OH limit. The transfer gate is further configured to allow an SCSI device incorporating the circuit to be hot-switched onto and off of an active SCSI bus.
REFERENCES:
patent: 5345357 (1994-09-01), Pianka
patent: 5751978 (1998-05-01), Tipple
patent: 5832244 (1998-11-01), Jolley et al.
patent: 5862350 (1999-01-01), Coulson
Adaptec, Inc.
Sheikh Ayaz R.
Wiley David A.
LandOfFree
Hot-switchable SCSI controller having output drivers with quick does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hot-switchable SCSI controller having output drivers with quick , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hot-switchable SCSI controller having output drivers with quick will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-895992