Inventor · disambiguated record
Duc T. Phan
Also filed as: PHAN DUC · PHAN DUC T · PHAN DUC TIEN
40 granted patents·1 pending application·2,583 citations·filing 1992–2021
98Inventor score
Top patents by PatentIndex Score
41 records- 0198US8605384B1Disk drive performing lifetime logging of microactuator sensitivityWESTERN DIGITAL TECH INC·Filed 2012·Granted Dec 10, 2013·110 cites·24 claims
- 0298US8315006B1Adaptive data writing mode based on drive environmentCHAHWAN ALAIN·Filed 2010·Granted Nov 20, 2012·161 cites·27 claims
- 0398US7839600B1Disk drive employing data-based basis function expansion for tuning seek servo loopWESTERN DIGITAL TECH INC·Filed 2009·Granted Nov 23, 2010·109 cites·14 claims
- 0497US8717696B1Disk drive adjusting noise spectrum to reduce resonance excitation of shock detectorWESTERN DIGITAL TECH INC·Filed 2012·Granted May 6, 2014·97 cites·22 claims
- 0597US8179626B1Adaptive shock detectionRYAN ROBERT P·Filed 2009·Granted May 15, 2012·119 cites·24 claims
- 0697US7660067B1Disk drive initializing a coil temperature estimation algorithm using a resistance of the coil estimated during a load operationWESTERN DIGITAL TECH INC·Filed 2007·Granted Feb 9, 2010·112 cites·19 claims
- 0797US7558016B1Disk drive servo control techniques for predicting an off-track condition utilizing an estimation filterWESTERN DIGITAL TECH INC·Filed 2007·Granted Jul 7, 2009·111 cites·18 claims
- 0896US8743495B1Disk drive detecting track squeeze when circular tracks are defined from non-circular servo tracksCHEN MIN·Filed 2011·Granted Jun 3, 2014·101 cites·16 claims
- 0996US8508881B1Disk drive employing system inversion for tuning seek to settle servo loopBABINSKI ALEXANDER·Filed 2011·Granted Aug 13, 2013·109 cites·18 claims
- 1096US7961422B1Disk drive computing data center off-track from repeatable runout of write servo track and read servo trackWESTERN DIGITAL TECH INC·Filed 2009·Granted Jun 14, 2011·116 cites·16 claims
- 1196US7864482B1Disk drive calibrating VCM notch filter by increasing the width and/or the depth of the notchWESTERN DIGITAL TECH INC·Filed 2009·Granted Jan 4, 2011·115 cites·24 claims
- 1296US7688538B1Disk drive comprising a disk surface having track addresses of varying widthWESTERN DIGITAL TECH INC·Filed 2007·Granted Mar 30, 2010·113 cites·14 claims
- 1396US7616399B1Disk drive servo control techniques to preserve PES continuityWESTERN DIGITAL TECH INC·Filed 2006·Granted Nov 10, 2009·119 cites·22 claims
- 1495US8797664B1Polarity detection of piezoelectric actuator in disk driveWESTERN DIGITAL TECH INC·Filed 2012·Granted Aug 5, 2014·77 cites·20 claims
- 1595US8767343B1Disk drive increasing integrator output range to complete seek operationHELMICK DANIEL L·Filed 2012·Granted Jul 1, 2014·83 cites·20 claims
- 1695US8542455B2Disk drive upsampling servo control signalHUANG YANAN·Filed 2011·Granted Sep 24, 2013·110 cites·14 claims
- 1795US7679854B1Head switch operation for a disk driveWESTERN DIGITAL TECH INC·Filed 2008·Granted Mar 16, 2010·109 cites·23 claims
- 1894US8804267B2Disk drive predicting spindle motor failure by evaluating current draw relative to temperatureWESTERN DIGITAL TECH INC·Filed 2012·Granted Aug 12, 2014·77 cites·16 claims
- 1994US8553351B1Disk drive correcting track ID in response to an estimated radial location and a burst PESNARAYANA ASWARTHA·Filed 2011·Granted Oct 8, 2013·107 cites·8 claims
- 2094US5696647AMethod for carrying out seeks in a hard disc drive to limit the generation of acoustic noise including using a slew rate limitSEAGATE TECHNOLOGY·Filed 1994·Granted Dec 9, 1997·60 cites·3 claims
- 2194US5369345AMethod and apparatus for adaptive controlSEAGATE TECHNOLOGY·Filed 1992·Granted Nov 29, 1994·213 cites·64 claims
- 2292US5760992AMethod for carrying out seeks in a hard disc drive to limit the generation of acoustic noiseSEAGATE TECHNOLOGY·Filed 1996·Granted Jun 2, 1998·60 cites·3 claims
- 2388US5751513AMethod for carrying out seeks in a hard disc drive to limit the generation of acoustic noiseSEAGATE TECHNOLOGY·Filed 1996·Granted May 12, 1998·42 cites·5 claims
- 2484US5721648AMultirate digital control system for use with a system having a linear transfer function, such as a head positioning system in a magnetic disc driveSEAGATE TECHNOLOGY·Filed 1996·Granted Feb 24, 1998·42 cites·22 claims
- 2582US9142225B1Electronic system with actuator control mechanism and method of operation thereofWESTERN DIGITAL TECH INC·Filed 2014·Granted Sep 22, 2015·5 cites·22 claims
- 2682US8896955B1Adaptive track follow controlCHEN MIN·Filed 2011·Granted Nov 25, 2014·8 cites·23 claims
- 2782US5726825AMethod for carring out seeks in a hard disc drive to limit the generation of acoustic noiseFiled 1996·Granted Mar 10, 1998·29 cites·5 claims
- 2881US8988811B1Disk drive toggling VCM inductor compensation to reduce acoustic noiseDING JIANGHONG·Filed 2008·Granted Mar 24, 2015·7 cites·25 claims
- 2979US9076473B1Data storage device detecting fly height instability of head during load operation based on microactuator responseWESTERN DIGITAL TECH INC·Filed 2014·Granted Jul 7, 2015·4 cites·34 claims
- 3079US5473550AFast calibration using microstepsSEAGATE TECHNOLOGY·Filed 1994·Granted Dec 5, 1995·24 cites·4 claims
- 3177US9142235B1Disk drive characterizing microactuator by injecting sinusoidal disturbance and evaluating feed-forward compensation valuesBABINSKI ALEXANDER·Filed 2009·Granted Sep 22, 2015·4 cites·24 claims
- 3274US11898129B2Microfluidic pressure regulator for robust hydrogel loading without burstingUNIV CALIFORNIA·Filed 2021·Granted Feb 13, 2024·0 cites·6 claims
- 3371US8929022B1Disk drive detecting microactuator degradation by evaluating frequency component of servo signalWESTERN DIGITAL TECH INC·Filed 2012·Granted Jan 6, 2015·2 cites·30 claims
- 3470US8922931B1Disk drive releasing variable amount of buffered write data based on sliding window of predicted servo qualityWESTERN DIGITAL TECH INC·Filed 2013·Granted Dec 30, 2014·2 cites·24 claims
- 3568US9355666B1Disk drive measuring stroke difference between heads by detecting a difference between ramp contactWESTERN DIGITAL TECH INC·Filed 2015·Granted May 31, 2016·2 cites·26 claims
- 3664US9286927B1Data storage device demodulating servo burst by computing slope of intermediate integration pointsWESTERN DIGITAL TECH INC·Filed 2014·Granted Mar 15, 2016·1 cites·22 claims
- 3761US5566095AFast calibration using microstepsSEAGATE TECHNOLOGY·Filed 1995·Granted Oct 15, 1996·13 cites·6 claims
- 3854US11180724B2Microfluidic pressure regulator for robust hydrogel loading without burstingUNIV CALIFORNIA·Filed 2016·Granted Nov 23, 2021·0 cites·5 claims
- 3950US9349401B1Electronic system with media scan mechanism and method of operation thereofWESTERN DIGITAL TECH INC·Filed 2014·Granted May 24, 2016·0 cites·24 claims
- 4050US6188539B1Extended position error signal linearization and normalizationSEAGATE TECHNOLOGY LLC·Filed 1998·Granted Feb 13, 2001·10 cites·17 claims
- 4140US2005249508A1Method and system for controlling laser diodes in optical communications systemsAVANEX CORP·Filed 2005·Application pending·0 cites
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