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Browse by Category: Main > Information Technology
Class Information
Number: 360/77.02
Name: Dynamic magnetic information storage or retrieval > Automatic control of a recorder mechanism > Controlling the head > Track centering > Rotary carrier
Description: Subject matter which controls a transducer centering position relative to a circular revolving medium.










Sub-classes under this class:

Class Number Class Name Patents
360/77.04 By memory storage of repeatable error or correction 625
360/77.03 By nonmagnetic sensing (e.g., optical, capacitive) 253
360/77.05 By servo signal component from carrier surface separate from information signal bearing surface 199
360/77.07 By tracking signal recorded on or immediately beneath surface 234
360/77.06 Reproduced data signal used for tracking 198


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14

Patent Number Title Of Patent Date Issued
7733588 Repetitive feed-forward algorithm for self-servo-write PLL Jun. 8, 2010
7724457 Method and system for time-shift based rotational vibration sensing in disk drives May. 25, 2010
7719787 Phase locked anti- notch filter in a servo control loop May. 18, 2010
7706099 Magnetic disk drive and method of controlling the same Apr. 27, 2010
7706096 Disk drive device manufacturing method thereof, and method for specifying data track pitch for the disk drive device Apr. 27, 2010
7701660 Shock cancellation system Apr. 20, 2010
7688019 Method and system for compensating for position error of step motor Mar. 30, 2010
7684142 Disk device, positioning control circuit and information processing apparatus using same Mar. 23, 2010
7679851 Methods and structure for improved disk head switching to avoid zipper zones Mar. 16, 2010
7667911 Self servo writing disk controller and methods for use therewith Feb. 23, 2010
7663832 Method of compensating for track zero position in reference servo track copying system and disc drive using the same Feb. 16, 2010
7656607 Disk drive comprising a servo accelerator employing a dual state variable memory Feb. 2, 2010
7643239 Controller selection to reduce written-in run-out Jan. 5, 2010
7633704 Regulating tuning rate of adaptive filter coefficients for feed-forward disturbance rejection in a servo control loop Dec. 15, 2009
7630163 Storage device and seek control method Dec. 8, 2009
7626781 Data recording device Dec. 1, 2009
7626780 Magnetic disk drive Dec. 1, 2009
7612960 Method for formatting data sectors on magnetic disk, and magnetic disk drive Nov. 3, 2009
7602129 Rotary-motor-loaded device and control characteristic measurement method and program Oct. 13, 2009
7602568 Synchronous RRO write Oct. 13, 2009
7599140 Output control device and recording-medium-driver control device Oct. 6, 2009
7599144 Method and apparatus compensating disturbance in state control device Oct. 6, 2009
7593180 HDD data read control apparatus, medium, and method Sep. 22, 2009
7589925 Method of accessing variable density data tracks in a disk drive Sep. 15, 2009
7586709 Read write offset error correction using geometric reference in self servo write process Sep. 8, 2009
7586707 Magnetic disk drive with increased storage capacity Sep. 8, 2009
7583465 Disk drive adaptive resonance compensation method and apparatus Sep. 1, 2009
7583468 Method and apparatus of dual stage servo control with dual control paths and decoupling feedback for track following in a hard disk drive Sep. 1, 2009
7583469 Up-sampled filtering for servo demodulation Sep. 1, 2009
7583460 Edge controlled fast data pattern generator Sep. 1, 2009
7580210 Method, apparatus, and medium for determining read and write frequencies in data storing systems and a disk drive using the same Aug. 25, 2009
7580217 Disk drive with hybrid analog-digital acceleration feedforward control system and method for rejecting rotational vibration Aug. 25, 2009
7576940 Method and apparatus for estimating micro-actuator stroke sensitivity in a hard disk drive Aug. 18, 2009
7573667 Servo information write method and apparatus Aug. 11, 2009
7567400 Method and apparatus for improving the error rate of track information on a magnetic storage device Jul. 28, 2009
7564641 Controller-characteristic changing apparatus, storage device, controller-characteristic changing method, and computer product Jul. 21, 2009
7561369 Drive unit Jul. 14, 2009
7551388 Fall detection device and magnetic disk drive Jun. 23, 2009
7548393 HDD track following control apparatus and method Jun. 16, 2009
7545595 Magnetic disk apparatus having an adjustable mechanism to compensate write or heat element for off-tracking position with yaw angle Jun. 9, 2009
7542229 Magnetic recording-reproducing apparatus Jun. 2, 2009
7538971 Microactuator control adjustment using temperature sensor measurements May. 26, 2009
7535192 Head positioning control method, head positioning control device and disk apparatus May. 19, 2009
7532426 Method for erase process on recording surface of disk and disk drive apparatus May. 12, 2009
7529059 Method for determining read/write head position based on phase detection of a servo pattern May. 5, 2009
7529057 Servo loop employing correction vector from a secondary disturbance sensor to minimize correlation between servo loop error and disturbance sensor output May. 5, 2009
7525753 Reducing seek wind-up in a disk drive using early acceleration feedforward signal Apr. 28, 2009
7518960 Method and apparatus for positioning beam spot on recording medium Apr. 14, 2009
7508619 Magnetic head and magnetic disc drive Mar. 24, 2009
7492545 Method and system for automatic time base adjustment for disk drive servo controllers Feb. 17, 2009

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