Disk drive employing a multi-stage pulse width modulated...

Details Disk drive employing a multi-stage pulse width modulated... Disk drive employing a multi-stage pulse width modulated...

2006-10-24

2006-10-24

Young, Wayne (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S078040

Reexamination Certificate

active

07126781

ABSTRACT:
A disk drive is disclosed comprising a disk and a voice coil motor (VCM) having a voice coil for actuating a head over the disk. A VCM driver comprises an H-bridge driver having a plurality of driver switches for driving current through the voice coil to ground. A first pulse width modulated (PWM) signal controls a first voltage level driving the voice coil relative to a duty cycle of the first PWM signal, and a second PWM signal controls a second voltage level driving the voice coil relative to a duty cycle of the second PWM signal, wherein the first voltage level is greater than the second voltage level.

REFERENCES:
patent: 5781362 (1998-07-01), Bang
patent: 5818178 (1998-10-01), Marumoto et al.
patent: 5838515 (1998-11-01), Mortazavi et al.
patent: 6023143 (2000-02-01), Salina et al.
patent: 6084378 (2000-07-01), Carobolante
patent: 6850383 (2005-02-01), Bennett
U.S. Appl. No. 10/028,954, filed Dec. 10, 2001, entitled “Digital Amplifier with Improved Performance”.

Affiliated with

Also associated with

Rating

Disk drive employing a multi-stage pulse width modulated... 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 employing a multi-stage pulse width modulated..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disk drive employing a multi-stage pulse width modulated... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3624254