Apparatus for connecting and disconnecting drives under active s

Details Apparatus for connecting and disconnecting drives under active s Apparatus for connecting and disconnecting drives under active s

1996-12-27

1997-11-18

Sheikh, Ayaz R.

Electronic digital logic circuitry

Multifunctional or programmable

Array

326 30, G06F 1300

Patent

active

056896557

ABSTRACT:
An apparatus for connecting and disconnecting a plurality of drives connected in parallel with respect to a data transmission line in a magnetic disk system, etc., to and from the data transmission line under an active state, has data communication terminals provided for each of the drives, so as to be connected to the data transmission line and disconnected from the data transmission line; and units for fixing the levels at the data communication terminals when the data communication terminals are open. Preferably, the units for fixing the levels includes resistors connected between the data communication terminals and a ground, the resistance of each of the resistors being determined not to disturb an impedance of the data transmission line.

REFERENCES:
patent: 4808853 (1989-02-01), Taylor
patent: 4890271 (1989-12-01), Stohs
patent: 5142594 (1992-08-01), Sugishima
patent: 5192883 (1993-03-01), Kimura
patent: 5285512 (1994-02-01), Duncan et al.
patent: 5317697 (1994-05-01), Husak et al.
patent: 5432916 (1995-07-01), Hahn et al.

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