Switchable active termination for SCSI peripheral devices

Electronic digital logic circuitry – Signal sensitivity or transmission integrity – Bus or line termination

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

326 86, 326 90, 375257, H03K 1716

Patent

active

054225809

ABSTRACT:
A switchable active termination device internally mounted within a peripheral device and electrically connected to the end of a Small Computer Systems Interface (SCSI) bus cable. Through use of a pair of SCSI active terminator circuit chips, the termination device actively terminates the data lines of the bus cable in a first operating mode in response to a first digital command by providing precise resistive pull-up to a predetermined value on each data line. In a second mode of operation responsive to a second digital command, the termination device disconnects all terminating resistors. Activation of the termination modes is logically driven from an included switch, with visual indication of the presence of an active termination state provided by a light emitting diode.

REFERENCES:
patent: 4200876 (1980-08-01), Ray
patent: 4675551 (1987-06-01), Stevenson et al.
patent: 4748426 (1988-05-01), Stewart
patent: 4821170 (1989-04-01), Bernick et al.
patent: 4831283 (1989-04-01), Newton
patent: 4859877 (1989-08-01), Cooperman et al.
patent: 4864291 (1989-09-01), Korpi
patent: 4920339 (1990-04-01), Friend et al.
patent: 5029284 (1991-07-01), Feldbaumer et al.
patent: 5272396 (1993-12-01), Mammano et al.
Product & Applications Handbook 1993-1994, by Unitrode Integrated Circuits Corporation (U.I.C.C.), Jun. 1993.
Unitrode, SCSI Active Terminator, UC5601, data manual, Sep. 9, 1991.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Switchable active termination for SCSI peripheral devices does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Switchable active termination for SCSI peripheral devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switchable active termination for SCSI peripheral devices will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-989987

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.