Inventor
HEYDT JEFFREY A
US9 patents
Patents
9 patentsUS6710567B2Mar 23, 2004
Velocity dependent reference profile for spindle motor acceleration control
SEAGATE TECHNOLOGY LLC29 citations91
US6664749B2Dec 16, 2003
Spindle motor initialization after a control processor reset condition in a disc drive
SEAGATE TECHNOLOGY LLC28 citations91
US6577088B2Jun 10, 2003
Closed loop spindle motor acceleration control in a disc drive
SEAGATE TECHNOLOGY LLC34 citations91
US7046463B2May 16, 2006
Low flying head detection using readback signal amplitude modulation
SEAGATE TECHNOLOGY LLC22 citations90
US6768609B2Jul 27, 2004
Reducing position error signal nonlinearity through iterative calibration of a compensation table
SEAGATE TECHNOLOGY LLC25 citations88
US7432677B2Oct 7, 2008
Closed-loop rotational control of a brushless dc motor
SEAGATE TECHNOLOGY LLC39 citations86
US6876510B2Apr 5, 2005
Detecting head landings on a data zone of a data storage disc
SEAGATE TECHNOLOGY LLC13 citations82
US6487033B1Nov 26, 2002
Motor speed observer for data protection in a disc drive
SEAGATE TECHNOLOGY LLC14 citations81
US7062160B2Jun 13, 2006
Monitoring current in a motor during acceleration to verify motor frequency lock
SEAGATE TECHNOLOGY LLC5 citations61