Disk drive charging capacitor using motor supply voltage during power failure
TA Ferris, RP Ryan - US Patent 9,093,105, 2015 - Google Patents
A disk drive is disclosed comprising a disk, a spindle motor operable to rotate the disk, a
head actuated over the disk, an interface operable to receive a host supply voltage, and a …
head actuated over the disk, an interface operable to receive a host supply voltage, and a …
Disk drive comprising slanted line servo bursts having a varying tilt angle
G Guo, J Yu - US Patent 7,916,416, 2011 - Google Patents
BACKGROUND Disk drives comprise a diskanda head connected to a distal end of an
actuator arm which is rotated about a pivot by a voice coil motor (VCM) to position the head …
actuator arm which is rotated about a pivot by a voice coil motor (VCM) to position the head …
Disk drive adjusting servo burst signals to compensate for radial velocity of the head
(57) ABSTRACT A disk drive is disclosed comprising a head actuated over a disk
comprising a plurality of servo sectors that define a plurality of servo tracks, wherein the …
comprising a plurality of servo sectors that define a plurality of servo tracks, wherein the …
Disk drive employing velocity insensitive servo burst pattern
M Chen, Q Zheng - US Patent 8,189,286, 2012 - Google Patents
BACKGROUND Disk drives comprise a disk and a head connected to a distal end of an
actuator arm Which is rotated about a pivot by a voice coil motor (VCM) to position the head …
actuator arm Which is rotated about a pivot by a voice coil motor (VCM) to position the head …
Disk drive rotating phase based servo bursts based on radial location of head
BACKGROUND Disk drives comprise a diskanda head connected to a distal end of an
actuator arm which is rotated about a pivot by a voice coil motor (VCM) to position the head …
actuator arm which is rotated about a pivot by a voice coil motor (VCM) to position the head …
Disk drive employing radially coherent reference pattern for servo burst demodulation and fly height measurement
G Guo, J Yu - US Patent 8,824,081, 2014 - Google Patents
(57) ABSTRACT A disk drive is disclosed comprising a disk comprising a plurality of data
tracks defined by servo sectors. Each servo sector comprises a periodic preamble recorded …
tracks defined by servo sectors. Each servo sector comprises a periodic preamble recorded …
Data storage device employing adaptive feed-forward control in timing loop to compensate for vibration
JG Zhou, W Xi, G Guo, H Li - US Patent 9,111,575, 2015 - Google Patents
A data storage device is disclosed comprising a head actuated over a disk and a vibration
detector configured to generate a vibration signal in response to a vibration affecting the …
detector configured to generate a vibration signal in response to a vibration affecting the …
Disk drive measuring radial offset between heads by detecting a difference between ramp contact
J Nie, ED Sheh, BP Rigney - US Patent 9,064,537, 2015 - Google Patents
A disk drive is disclosed comprising a plurality of disk surfaces including a first disk surface
and a second disk surface. The disk drive further comprises a plurality of heads including a …
and a second disk surface. The disk drive further comprises a plurality of heads including a …
Data storage device reading servo sector while writing data sector
6,204,988 B1 3/2001 Codilian et al. 6,958,881 B1 10/2005 Codilian et al. 6,243,223 B1 6,
2001 Elliott et al. 6,963,465 B1 1 1/2005 Melkote et al. 6.265. 86s B1 7/2001 Richter …
2001 Elliott et al. 6,963,465 B1 1 1/2005 Melkote et al. 6.265. 86s B1 7/2001 Richter …
Power control module using protection circuit for regulating backup voltage to power load during power fault
RP Mayo - US Patent 9,899,834, 2018 - Google Patents
A power control module comprising low voltage (LV) port for receiving low supply voltage via
LV supply line, high voltage (HV) input port for receiving high supply voltage via HV supply …
LV supply line, high voltage (HV) input port for receiving high supply voltage via HV supply …