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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
7203022 Disk device, and positioning control method and signal-processing circuit for head Apr. 10, 2007
7203018 Servo writer with clamping push pin Apr. 10, 2007
7190546 Systems using extended servo patterns with variable multi-pass servowriting and self-servowriting Mar. 13, 2007
7173781 Multi-tracks MR offset tuning based on error count in certification process Feb. 6, 2007
7158330 Method and apparatus for servo track writing by track following on a dedicated servo disk on a fluid spindle bearing Jan. 2, 2007
7158333 Up-sampled filtering for servo demodulation Jan. 2, 2007
7158334 Method and apparatus for head positioning control with disturbance compensation in a disk drive Jan. 2, 2007
7158335 Method for resonance identification in hard disk drives Jan. 2, 2007
7154699 High bandwidth large stroke spin-stand Dec. 26, 2006
7151645 Interleaved repeatable runout estimation Dec. 19, 2006
7149044 Methods, apparatus and computer program products for writing tracks on a disk based on an available stroke Dec. 12, 2006
7142387 Method and apparatus positioning a read head to follow a track in a hard disk drive Nov. 28, 2006
7139149 Adapting compensation for repeatable runout of sectors based on tracked sector adaptation status Nov. 21, 2006
7136251 Methods for WORF improvement in conditional servowriting Nov. 14, 2006
7136249 Positioning device Nov. 14, 2006
7136245 Disk device Nov. 14, 2006
7126785 Multi-stage actuator disk drives, methods, and computer program products for seeking and then maintaining a transducer on track Oct. 24, 2006
7116513 Positioning transducers based on a compensation scheme that varies based on transducer vibrational state Oct. 3, 2006
7106537 Disk drive using a timer to arbitrate periodic serial communication with a power driver Sep. 12, 2006
7106540 Ensuring rate of spin-up/spin-down cycles for spindle motor in a hard disk drive does not exceed rate spindle motor is designed to handle Sep. 12, 2006
7102847 Identification of laterally positioned servo bands employing differentiating characteristics of servo patterns Sep. 5, 2006
7092197 Rejection of power supply variations for gain error cancellation in pulse-width-modulated motor controllers Aug. 15, 2006
7088546 Method to reject disk drive disturbance Aug. 8, 2006
7088535 Off-track retry method in hard disk drive Aug. 8, 2006
7085084 Magnetic disk apparatus and servo pattern recording method therefor Aug. 1, 2006
7082007 Method to achieve higher track density by allowing only one-sided track encroachment Jul. 25, 2006
7057843 Disk drive control circuit and method Jun. 6, 2006
7054094 Real-time automatic loop-shaping for a disc drive servo control system May. 30, 2006
7050257 Method for estimating the resistance of a DC motor for positioning read/write heads of a hard disk May. 23, 2006
7046476 Method apparatus and system for accessing discontinuous media tracks May. 16, 2006
7042664 Method and system for host programmable data storage device self-testing May. 9, 2006
7042666 Disk drive having improved timing marks May. 9, 2006
7038886 Positioner for precisely moving an E-block of a disk drive May. 2, 2006
7035037 Disc drive with compensation for non-repeatable runout Apr. 25, 2006
7035042 Fast positioning of disk drives and other physical systems Apr. 25, 2006
7031095 Servo controller method and apparatus for high tracks per inch hard disk drives using a delay accomodating state estimator Apr. 18, 2006
7023637 Disk drive having a disk including a servo burst pattern that improves the signal to noise ratio during track following for writing Apr. 4, 2006
7019936 Method and apparatus for head positioning control in perpendicular magnetic recording of disk drive Mar. 28, 2006
7016141 Settle, rotational/linear vibration, and track follow controller optimization with shared state controller Mar. 21, 2006
7016142 Apparatus and method for removing mechanical resonance using adaptive notch filter Mar. 21, 2006
7016132 Magnetic data embedding system Mar. 21, 2006
7012780 Disk drive and methods that calibrate micro actuator positioning before seek operations Mar. 14, 2006
7009804 Method and apparatus for micro-actuator stroke sensitivity calibration in a hard disk drive Mar. 7, 2006
7009803 Method and apparatus of dual stage servo control for track following in a hard disk drive Mar. 7, 2006
7009791 Position detecting method, information recording/reproducing device and information recording medium Mar. 7, 2006
7002769 Head control method and recording apparatus Feb. 21, 2006
6999265 Method and system for dual element transducer flight height adjustment using combined thermal and electrostatic control Feb. 14, 2006
6995945 Head positioning system, disk drive apparatus using the same, and head positioning method Feb. 7, 2006
6992853 Method and apparatus for determining modulated, amplitude ramping RRO harmonics in multi-screw clamped HDD disk/spind assembly Jan. 31, 2006
6989955 Efficient transition from class D to linear operation in dual-mode voice coil motor controllers Jan. 24, 2006

1 2 3 4 5 6 7 8 9 10 11 12 13 14

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