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2010-06-23 |
2011-12-13 |
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Disk drive correcting position error signal based on velocity of head
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2010-06-25 |
2012-10-30 |
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Disk drive detecting disk boundaries using microactuator
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2010-08-31 |
2013-07-30 |
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Data storage device evaluating frequency range of supply voltage to detect power failure
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2010-08-31 |
2014-11-25 |
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Adaptive track follow control
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2010-11-30 |
2014-04-01 |
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Edge detection for disk drives
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2010-12-13 |
2013-09-10 |
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Disk drive adjusting servo burst signals to compensate for radial velocity of the head
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2011-01-28 |
2013-12-31 |
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Disk drive biasing sync pattern of an extended sync mark
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2011-02-15 |
2013-03-05 |
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Ensuring minimum gate speed during startup of gate speed regulator
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2011-03-21 |
2012-08-28 |
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Disk drive tuning dual stage actuator servo loop gains from open loop response at target frequency
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2011-05-03 |
2015-04-14 |
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Booting from a secondary storage device in order to accumulate disk drive performance data
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2011-05-12 |
2014-05-27 |
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Disk drive adjusting gain of spindle motor compensator based on a ratio of spin speeds
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2011-05-23 |
2013-05-28 |
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Disk drive centering demodulation windows on spiral tracks during a seek operation
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2011-05-23 |
2013-04-30 |
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Disk drive centering sync frames on sync marks of a spiral track
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2011-05-26 |
2013-08-13 |
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Disk drive employing system inversion for tuning seek to settle servo loop
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2011-06-03 |
2014-06-03 |
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Disk drive detecting track squeeze when circular tracks are defined from non-circular servo tracks
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2011-06-03 |
2014-06-24 |
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Reducing acoustic noise in a disk drive when exiting idle mode
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2011-06-08 |
2013-12-10 |
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Disk drive to load a head to a load/unload (LUL) zone of a disk
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2011-06-23 |
2014-04-08 |
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Alternating wedge repeatable runout (WRRO) pattern
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2011-06-27 |
2014-04-08 |
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Disk drive correcting high order gray code using track estimator and decoding low order track code separately
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2011-06-29 |
2013-12-17 |
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Disk drive optimizing spindle motor torque by adjusting leading phase angle during spin-up
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2011-08-08 |
2014-01-21 |
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Disk drive performing in-drive spiral track writing
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2011-08-08 |
2014-01-21 |
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Disk drive writing a sync mark seam in a bootstrap spiral track
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2011-08-09 |
2013-10-22 |
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Disk drive decreasing a settle delay based on speed that a settle parameter adapts
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2011-08-10 |
2013-09-17 |
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Disk drive writing spiral tracks on a slave surface using repeatable runout compensation for a master surface
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2011-09-01 |
2014-04-15 |
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Disk drive detecting touchdown event by evaluating frequency response of a touchdown metric
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2011-09-21 |
2014-01-14 |
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Systems and methods for data throttling during disk drive power down
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2011-10-06 |
2013-10-08 |
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Disk drive correcting track ID in response to an estimated radial location and a burst PES
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2011-11-16 |
2014-01-21 |
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Disk drive generating feed-forward actuator compensation based on a speaker driver signal
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2011-11-16 |
2014-05-27 |
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Disk drive selecting disturbance signal for feed-forward compensation
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2011-11-16 |
2013-09-24 |
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Disk drive upsampling servo control signal
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2011-11-21 |
2014-02-18 |
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Calculation of head media separation (HMS) from servo preamble in a hard disk drive
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2011-12-08 |
2014-07-01 |
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Data storage device employing cascaded voltage regulators during power failure
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2011-12-09 |
2015-07-28 |
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Disk drive charging capacitor using motor supply voltage during power failure
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2011-12-22 |
2014-03-04 |
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Disk drive adjusting gain and offset of BEMF velocity sensor during self writing of spiral tracks
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2012-01-10 |
2014-05-06 |
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Voltage quadrupler comprising a second charging capacitor charged using a first charging capacitor
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2012-02-28 |
2014-05-06 |
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Disk drive defining non-circular data tracks relative to a rotation axis of the disk
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2012-02-28 |
2014-06-10 |
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Disk drive compensating for track squeeze by writing non-circular servo tracks
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2012-02-29 |
2014-01-14 |
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Methods for closed-loop compensation of ultra-high frequency disturbances in hard disk drives and hard disk drives utilizing same
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2012-03-13 |
2014-09-02 |
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Disk drive employing radially coherent reference pattern for servo burst demodulation and fly height measurement
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2012-03-27 |
2014-03-11 |
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Disk drive estimating repeatable runout of reference pattern based on repeatable runout of phase error
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2012-03-27 |
2014-05-13 |
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Disk drive adjusting demodulation window for spiral track using timing feed-forward compensation
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2012-03-28 |
2014-02-11 |
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Disk drive tuning speed control loop for a spindle motor
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2012-03-29 |
2014-07-08 |
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Changing the performance level of a disk drive
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2012-04-16 |
2014-02-18 |
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Disk drive increasing bandwidth of cutoff filter while reading servo sector preamble
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2012-04-24 |
2014-07-01 |
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Disk drive increasing integrator output range to complete seek operation
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2012-06-21 |
2014-05-13 |
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Disk drive employing overlapping servo zones to facilitate servo zone crossing
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2012-06-21 |
2013-11-05 |
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Disk drive estimating reader/writer gap across servo zones
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2012-06-21 |
2014-07-15 |
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Disk drive adjusting servo timing to compensate for transient when crossing a servo zone boundary
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2012-07-25 |
2014-06-03 |
Western Digital Technologies, Inc. |
Servoing on zoned concentric servo sectors of a first disk surface to write a spiral servo track to a second disk surface
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2012-09-27 |
2013-12-17 |
Western Digital Technologies, Inc. |
Disk drive adjusting microactuator gain by injecting a sinusoid into a servo control system
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2012-11-06 |
2013-12-10 |
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Disk drive performing lifetime logging of microactuator sensitivity
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2012-11-07 |
2014-08-12 |
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Disk drive predicting spindle motor failure by evaluating current draw relative to temperature
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2012-11-19 |
2014-04-29 |
Western Digital Technologies, Inc. |
Analog-to-digital converter with input voltage biasing DC level of resonant oscillator
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2012-11-20 |
2014-07-15 |
Western Digital Technologies, Inc. |
Disk drive estimating microactuator gain by injecting a sinusoid into a closed loop servo system
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2012-12-04 |
2014-05-06 |
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Disk drive adjusting noise spectrum to reduce resonance excitation of shock detector
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2012-12-22 |
2014-08-05 |
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Polarity detection of piezoelectric actuator in disk drive
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2013-03-11 |
2014-06-03 |
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Disk drive updating compensation values for multiple servo sectors based on PES generated for current servo sector
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2013-04-03 |
2014-07-01 |
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Disk drive predicting off-track error due to disturbances occurring over different frequency ranges
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2013-05-17 |
2014-07-15 |
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Disk drive executing jerk seeks to rotate pivot ball bearings relative to races
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2013-08-19 |
2014-09-02 |
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Disk drive accounting for sinusoidal offset between heads when executing a rotational position optimization algorithm
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2013-08-29 |
2014-07-29 |
Western Digital Technologies, Inc. |
Disk drive adjusting rotation speed of disk to compensate for blind area when measuring frequency response of servo control system
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