Drive power sequencing

Details Drive power sequencing Drive power sequencing

1978-10-19

1980-11-11

Miller, Charles D.

Boots, shoes, and leggings

318102, G06F 100

Patent

active

042336660

ABSTRACT:
In a digital information storage system or the like, start up power sequencing for independently operable machines such as disk drives each equipped with a microprocessing unit is provided through a simplified power sequencing circuit. The power sequencing circuit is operatively coupled with an independent preprogrammable micropocessing unit in each machine and to a single control line common to all disk drives. The microprocessing unit is preprogrammed to interact with the power sequencing circuit to provide Enable/Disable signals to the control line and to sense the state of the control line. In particular, the microprocessing unit executes a preprogrammed sequence of steps in interaction with the control line to sequence the start-up of each spindle motor irrespective of the number of disk drives coupled to the control line, thereby preventing electrical power overload.

REFERENCES:
patent: 4055786 (1977-10-01), Dimarzio

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