Disk drive comprising a pulse width modulated demand limit...

Details Disk drive comprising a pulse width modulated demand limit... Disk drive comprising a pulse width modulated demand limit...

2005-11-29

2005-11-29

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S069000

Reexamination Certificate

active

06970319

ABSTRACT:
A disk drive is disclosed comprising a head, a disk and a spindle motor for rotating the disk. An internal supply voltage is generated from a back EMF (BEMF) voltage across the windings of the spindle motor. The internal supply voltage is applied to a voice coil motor for use in parking the head during a spin-down mode. The internal supply voltage is compared to a threshold in order to activate a demand limit control signal. A periodic signal periodically disconnects the internal supply voltage from the VCM while the demand limit control signal is active.

REFERENCES:
patent: 5444582 (1995-08-01), Suzuki
patent: 5504402 (1996-04-01), Menegoli
patent: 5781362 (1998-07-01), Bang
patent: 5838515 (1998-11-01), Mortazavi et al.
patent: 5898283 (1999-04-01), Bennett
patent: 6542324 (2003-04-01), Galbiati et al.
patent: 6574062 (2003-06-01), Bennett et al.

Affiliated with

Also associated with

Rating

Disk drive comprising a pulse width modulated demand limit... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Disk drive comprising a pulse width modulated demand limit..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disk drive comprising a pulse width modulated demand limit... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3497927