Magnetic disk drive

Details Magnetic disk drive Magnetic disk drive

2006-06-06

2006-06-06

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S069000

Reexamination Certificate

active

07057841

ABSTRACT:
A magnetic disk drive drives a switch and supplies induced power of a motor to an actuator to retract a magnetic head, if a power supply voltage is judged as being below a predetermined level. The switch is driven using an output voltage of a step-up circuit. The step-up circuit operates from before the power supply voltage drops below the predetermined level, so that the switch can be driven immediately. This makes it possible to efficiently supply the induced power to the actuator.

REFERENCES:
patent: 6025968 (2000-02-01), Albrecht
patent: 6549359 (2003-04-01), Bennett et al.
patent: 09-213035 (1997-08-01), None
patent: 2000-306380 (2000-11-01), None
patent: 2001-307408 (2001-11-01), None

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