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Class Information
Number: 360/77.06
Name: Dynamic magnetic information storage or retrieval > Automatic control of a recorder mechanism > Controlling the head > Track centering > Rotary carrier > Reproduced data signal used for tracking
Description: Subject matter for processing a reproduced information signal to control the transducer position.

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8630052 Disk drive calibrating radial density then adjusting linear density to balance off-track read capability Jan. 14, 2014
8619381 System and method for improving head positioning Dec. 31, 2013
8537485 Compensation for vibration in a data storage system Sep. 17, 2013
8537489 Detecting radial head position using spiral wedge information in self-servo-write Sep. 17, 2013
8134796 Embedded track information for patterned media Mar. 13, 2012
8116025 Disk drive executing retry operation after adjusting jog value in response to gain control Feb. 14, 2012
8023219 Storage device, head position detection method and control circuit Sep. 20, 2011
7885025 Generating PES using readback signal distortion Feb. 8, 2011
7852586 Device and method for scanning data stored on a recording medium Dec. 14, 2010
7771852 Magnetic recording disk with patterned nondata islands of alternating polarity Aug. 10, 2010
7751143 Head position control method, head position control device, and magnetic recording evaluation apparatus Jul. 6, 2010
7663832 Method of compensating for track zero position in reference servo track copying system and disc drive using the same Feb. 16, 2010
7612961 Magnetic recording disk and disk drive with patterned phase-type servo fields for read/write head positioning Nov. 3, 2009
7583470 Disk drive writing wedge RRO data along a sinusoidal path to compensate for reader/writer offset Sep. 1, 2009
7567397 Adjacent Track Interference (ATI) identification methodology Jul. 28, 2009
7567406 Method of writing pattern on magnetic disk and device therefor Jul. 28, 2009
7551379 Write element before read element with early servo termination on write Jun. 23, 2009
7532429 Write-head positioning method and disk drive May. 12, 2009
7529058 Track pitch examination method of storage apparatus, program, and storage apparatus May. 5, 2009
7529054 Adaptive recording band expansion methodology May. 5, 2009
7492546 Providing pre-determined servo position correction values for use during disk drive initialization Feb. 17, 2009
7453665 Method of adjusting magnetic head of magnetic tape recording and reproducing apparatus and magnetic tape recording and reproducing apparatus Nov. 18, 2008
RE40545 Servo control appartaus and method using absolute value input signals Oct. 21, 2008
7397628 Two degree of freedom position control method, two degree of freedom position control device, and medium storage device Jul. 8, 2008
7397627 Method of detecting position of head for recording medium Jul. 8, 2008
RE40413 Method and apparatus for developing a dynamic servo signal from data Jul. 1, 2008
7312946 Method and apparatus for servo control in a disk drive Dec. 25, 2007
7283320 Magnetic recording medium including servo and data bands in the magnetic layer Oct. 16, 2007
7268968 Vibration suppression for servo control Sep. 11, 2007
7265933 Disk drive computing repeatable run out while actuator arm is pressed against crash stop Sep. 4, 2007
7248429 Adaptive settling control method and apparatus in track seek mode of disc drive Jul. 24, 2007
7227708 System and method for determining long-range erasure of adjacent tracks in hard disk drive Jun. 5, 2007
7209311 Data storage device and control method therefor to prevent off-track writing Apr. 24, 2007
7203023 Magnetic recording unit and magnetic recording medium Apr. 10, 2007
7158338 Servo track having periodic frames of tone field and embedded synchronization marks Jan. 2, 2007
7106549 Magnetic recording and reproducing apparatus and magnetic recording medium Sep. 12, 2006
7106022 Velocity controlled disk drive head retraction with offset removal Sep. 12, 2006
7088535 Off-track retry method in hard disk drive Aug. 8, 2006
7085094 Interleaved repeatable runout correction for data storage device Aug. 1, 2006
7072137 Data read device, read method and circuit controlling read device Jul. 4, 2006
7009805 Detection of track misregistration within user data channel Mar. 7, 2006
7005849 System and method for high-speed massive magnetic imaging on a spin-stand Feb. 28, 2006
6989949 Performance test method of head gimgal assembly with precise positioning actuator Jan. 24, 2006
6950271 Disk drive and disk drive control method Sep. 27, 2005
6940677 Writing distinct servo patterns on individual transducers according to transducer read/write head characteristics in a data storage device Sep. 6, 2005
6924960 Timing compensation in a self-servowriting system Aug. 2, 2005
6914743 Vibration cancellation in a disk drive by using an acceleration sensor and adaptively adjusting its gain to minimize external acceleration effects Jul. 5, 2005
6906485 Spindle motor control using a current profile to taper current transitions Jun. 14, 2005
6888695 Information recording and reproducing apparatus having higher drive pulse frequency during seeking operation than during following operation May. 3, 2005
6873488 Enhanced MR offset with dynamic tuning range Mar. 29, 2005

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