Jeffrey A. Heydt

Person

Oklahoma City, OK, US

People

Patents Grantslast 30 patents

Information Patent Grant
Closed-loop rotational control of a brushless dc motor
- Patent number 7,432,677
- Issue date Oct 7, 2008
- Seagate Technology LLC
- Jeffrey A. Heydt
- G11 - INFORMATION STORAGE
Information Patent Grant
Predicting loss of frequency lock between a motor control circuit a...
- Patent number 7,197,410
- Issue date Mar 27, 2007
- Seagate Technology LLC
- Jeffrey Alan Heydt
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Monitoring current in a motor during acceleration to verify motor f...
- Patent number 7,062,160
- Issue date Jun 13, 2006
- Seagate Technology LLC
- Jeffrey A. Heydt
- G11 - INFORMATION STORAGE
Information Patent Grant
Low flying head detection using readback signal amplitude modulation
- Patent number 7,046,463
- Issue date May 16, 2006
- Seagate Technology LLC
- Alfredo Gay Sam
- G11 - INFORMATION STORAGE
Information Patent Grant
Detecting head landings on a data zone of a data storage disc
- Patent number 6,876,510
- Issue date Apr 5, 2005
- Seagate Technology LLC
- Jeffrey A. Heydt
- G11 - INFORMATION STORAGE
Information Patent Grant
Reducing position error signal nonlinearity through iterative calib...
- Patent number 6,768,609
- Issue date Jul 27, 2004
- Seagate Technology LLC
- Jeffrey A. Heydt
- G11 - INFORMATION STORAGE
Information Patent Grant
Velocity dependent reference profile for spindle motor acceleration...
- Patent number 6,710,567
- Issue date Mar 23, 2004
- Seagate Technology LLC
- Jeffrey A. Heydt
- G11 - INFORMATION STORAGE
Information Patent Grant
Spindle motor initialization after a control processor reset condit...
- Patent number 6,664,749
- Issue date Dec 16, 2003
- Seagate Technology LLC
- Jeffrey A. Heydt
- G11 - INFORMATION STORAGE
Information Patent Grant
Closed loop spindle motor acceleration control in a disc drive
- Patent number 6,577,088
- Issue date Jun 10, 2003
- Seagate Technology LLC
- Jeffrey A. Heydt
- G11 - INFORMATION STORAGE
Information Patent Grant
Motor speed observer for data protection in a disc drive
- Patent number 6,487,033
- Issue date Nov 26, 2002
- Seagate Technology LLC
- Jeffrey A. Heydt
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
Low flying head detection using readback signal amplitude modulation
- Publication number 20060215309
- Publication date Sep 28, 2006
- Seagate Technology LLC
- Alfredo Gay Sam
- G11 - INFORMATION STORAGE
Information Patent Application
Closed-loop rotational control of a brushless dc motor
- Publication number 20060132070
- Publication date Jun 22, 2006
- Seagate Technology LLC
- Jeffrey A. Heydt
- G11 - INFORMATION STORAGE
Information Patent Application
Frequency alignment acceleration control for a motor
- Publication number 20060031034
- Publication date Feb 9, 2006
- Jeffrey Alan Heydt
- G01 - MEASURING TESTING
Information Patent Application
Low flying head detection using readback signal amplitude modulation
- Publication number 20030184899
- Publication date Oct 2, 2003
- Seagate Technology LLC
- Alfredo Gay Sam
- G11 - INFORMATION STORAGE
Information Patent Application
Limited current sliding mode control for low RPM spindle motor spee...
- Publication number 20030184249
- Publication date Oct 2, 2003
- Seagate Technology LLC
- Jeffrey A. Heydt
- G11 - INFORMATION STORAGE
Information Patent Application
Monitoring current in a motor during acceleration to verify motor f...
- Publication number 20030175018
- Publication date Sep 18, 2003
- Seagate Technology LLC
- Jeffrey A. Heydt
- G11 - INFORMATION STORAGE
Information Patent Application
Detecting head landings on a data zone of a data storage disc
- Publication number 20030174429
- Publication date Sep 18, 2003
- Seagate Technology LLC
- Jeffrey A. Heydt
- G11 - INFORMATION STORAGE
Information Patent Application
Spindle motor initialization after a control processor reset condit...
- Publication number 20020171380
- Publication date Nov 21, 2002
- Seagate Technology LLC
- Jeffrey A. Heydt
- G11 - INFORMATION STORAGE
Information Patent Application
Closed loop spindle motor acceleration control in a disc drive
- Publication number 20020167287
- Publication date Nov 14, 2002
- Seagate Technology LLC
- Jeffrey A. Heydt
- G11 - INFORMATION STORAGE
Information Patent Application
Velocity dependent reference profile for spindle motor acceleration...
- Publication number 20020135333
- Publication date Sep 26, 2002
- Seagate Technology LLC
- Jeffrey A. Heydt
- G11 - INFORMATION STORAGE
Information Patent Application
Reducing disc drive position error signal nonlinearity through iter...
- Publication number 20020089779
- Publication date Jul 11, 2002
- Seagate Technology LLC
- Jeffrey A. Heydt
- G11 - INFORMATION STORAGE

Jeffrey A. Heydt

Person

Patents Grantslast 30 patents

Closed-loop rotational control of a brushless dc motor

Predicting loss of frequency lock between a motor control circuit a...

Monitoring current in a motor during acceleration to verify motor f...

Low flying head detection using readback signal amplitude modulation

Detecting head landings on a data zone of a data storage disc

Reducing position error signal nonlinearity through iterative calib...

Velocity dependent reference profile for spindle motor acceleration...

Spindle motor initialization after a control processor reset condit...

Closed loop spindle motor acceleration control in a disc drive

Motor speed observer for data protection in a disc drive

Patents Applicationslast 30 patents

Low flying head detection using readback signal amplitude modulation

Closed-loop rotational control of a brushless dc motor

Frequency alignment acceleration control for a motor

Low flying head detection using readback signal amplitude modulation

Limited current sliding mode control for low RPM spindle motor spee...

Monitoring current in a motor during acceleration to verify motor f...

Detecting head landings on a data zone of a data storage disc

Spindle motor initialization after a control processor reset condit...

Closed loop spindle motor acceleration control in a disc drive

Velocity dependent reference profile for spindle motor acceleration...

Reducing disc drive position error signal nonlinearity through iter...