Energy storage for use in emergency head retraction in disk...

Details Energy storage for use in emergency head retraction in disk... Energy storage for use in emergency head retraction in disk...

2005-06-07

2005-06-07

Sniezek, Andrew L. (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

06903893

ABSTRACT:
One embodiment of the present invention is a power source for a disk drive to handle an Emergency Power Off event that includes: (a) a storage capacitor; (b) a voltage source that outputs a first voltage that is applied as input to the storage capacitor; (c) a tester, responsive to the first voltage and a reference voltage; and (d) an adjustable voltage source, responsive to the tester output, that outputs a second voltage that is applied as input to the storage capacitor.

REFERENCES:
patent: 4786995 (1988-11-01), Stupeck et al.
patent: 6567232 (2003-05-01), Klaassen
patent: 6594102 (2003-07-01), Kanda et al.

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