Issued Patents All Time
Showing 51–75 of 91 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7573670 | Disk drive seeking to OD track and then ramping velocity to implement fast unload | Terry C. Dawson, Ashok K. Desai | 2009-08-11 |
| 7548392 | Disk drive controlling a voice coil motor during an emergency unload | Ashok K. Desai, Hemant Melkote | 2009-06-16 |
| 7224546 | Disk drive employing a calibrated brake pulse to reduce acoustic noise when latching an actuator arm | Gokhan Orakcilar, Steven Nemshick, Ashok K. Desai, Dean V. Dang, Lakshman Rathnam +1 more | 2007-05-29 |
| 7203021 | Self-heating disk drive | Dalwinder Singh | 2007-04-10 |
| 7158329 | Disk drive employing active braking using inductive sense | — | 2007-01-02 |
| 7113365 | Disk drive comprising a spindle motor having a windings shield for reduced disk voltage coupling | Alan P. Rice, Jon E. Jacoby | 2006-09-26 |
| 7095579 | Disk drive employing momentum based unload during power failure | Ashok K. Desai, Hemant Melkote, Jenghung Chen, John R. Agness, Terry C. Dawson | 2006-08-22 |
| 6970319 | Disk drive comprising a pulse width modulated demand limit circuit for enhancing power management during spin-down | George J. Bennett | 2005-11-29 |
| 6967458 | Decreasing spin up time in a disk drive by adjusting a duty cycle of a spindle motor PWM signal to maintain constant average input current | George J. Bennett | 2005-11-22 |
| 6934135 | Disk drive monitoring a supply current to protect motor driver circuits | — | 2005-08-23 |
| 6900959 | Disk drive comprising an offset-nulling amplifier for detecting a back EMF voltage of a voice coil motor | Norman D. Gardner | 2005-05-31 |
| 6867944 | Disk drive comprising VCM stall detector for velocity control of an actuator arm | — | 2005-03-15 |
| 6825622 | Production line spindle control circuit employing a sinusoidal driver with back EMF control | Raffi Codilian | 2004-11-30 |
| 6795268 | Disk drive employing seek time vcm ir voltage calibration for velocity control of an actuator arm | — | 2004-09-21 |
| 6788483 | Disk drive comprising a programmable inverting voltage regulator configured relative to the disk drive's mode of operation | Timothy A. Ferris | 2004-09-07 |
| 6690536 | Disk drive employing VCM demand current to calibrate VCM IR voltage for velocity control of an actuator arm | — | 2004-02-10 |
| 6577465 | Disk drive comprising spin down circuitry having a programmable signal generator for enhancing power and braking control | George J. Bennett | 2003-06-10 |
| 6574062 | Disk drive comprising a demand limit circuit for enhancing power management during spin down | George J. Bennett | 2003-06-03 |
| 6560056 | Disk drive comprising a motor driver IC employing a serial interface for initiating the transmission of real-time status data to a controller IC | — | 2003-05-06 |
| 6549359 | Disk drive comprising spin down circuitry having a current limit circuit for enhancing power and braking control | George J. Bennett | 2003-04-15 |
| 6549361 | Disk drive comprising spin down circuitry having a power clamp circuit for enhancing power and braking control | George J. Bennett | 2003-04-15 |
| 6538839 | Disk drive employing adaptive feed-forward vibration compensation to enhance a retry operation | — | 2003-03-25 |
| 6476996 | Disk drive comprising an actuator driver circuit for retracting a head independent of a servo microprocessor when a spindle speed fault mode is detected | — | 2002-11-05 |
| 6281652 | Method of using two low-resolution DACS for converting high-resolution digital demands into analog output signals that monotonically drive an actuator motor in a disk drive | George S. Bouchaya | 2001-08-28 |
| 6198590 | Disk drive employing method of spinning down its spindle motor to reduce the time required for subsequently spinning it up | Raffi Codilian, Terry C. Dawson, Carl R. Messenger, Steven Nemshick | 2001-03-06 |