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公开(公告)号：ES2152972T3
公开(公告)日：2001-02-16
申请号：ES94480084
申请日：1994-09-06
Applicant: IBM
Inventor： ANDERSON TODD BARRY , HAGEN MARK DAVID
Abstract: A phase modulated servo method and apparatus are provided for use in a disk file. The disk file includes at least one disk mounted for rotation about an axis and the disk has at least one disk surface for storing data. At a predefined location of the disk surface a series of servo tracks of a predetermined high gain servo pattern are written. The predetermined high gain servo pattern includes 360 DEG phase difference information within each data cylinder. The servo tracks are detected for identifying servo phase information.
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公开(公告)号：BR9403557A
公开(公告)日：1995-06-20
申请号：BR9403557
申请日：1994-09-14
Applicant: IBM
Inventor： ANDERSON TODD BARRY , HAGEN MARK DAVID
Abstract: A phase modulated servo method and apparatus are provided for use in a disk file. The disk file includes at least one disk mounted for rotation about an axis and the disk has at least one disk surface for storing data. At a predefined location of the disk surface a series of servo tracks of a predetermined high gain servo pattern are written. The predetermined high gain servo pattern includes 360 DEG phase difference information within each data cylinder. The servo tracks are detected for identifying servo phase information.
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公开(公告)号：GB2286481B
公开(公告)日：1997-12-10
申请号：GB9501719
申请日：1995-01-24
Applicant: IBM
Inventor： BROWN DANA HENRY , HAGEN MARK DAVID , PURKETT JOHN CHARLES
Abstract: A phase modulated servo method and apparatus provide acceptable position linearity for servo positioning with a narrow transducer head in a disk file. The disk file includes at least one disk mounted for rotation about an axis and the disk has at least one disk surface for storing data and has at least one transducer mounted for movement across the disk surface for writing to and for reading data and servo patterns from the disk surface. The transducer includes a read element and a write element. The read element has a width less than the write element and the read element width is greater than ⅓ of a data cylinder and less than ½ of a data cylinder. A servo pattern is written on the data disk surface having a track pitch of less than ½ of a data cylinder and the servo pattern repeats in a selected binary number of data cylinders.
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公开(公告)号：DE3381364D1
公开(公告)日：1990-04-26
申请号：DE3381364
申请日：1983-11-29
Applicant: IBM
Inventor： HAGEN MARK DAVID , MENDEL PETER JOSEPH , REGEHR JOHN LEON
IPC: G09F9/00 , G06F1/16 , G06F17/21 , G09G1/02 , G09G5/00 , G09G5/22 , G09G5/32 , G09G5/34 , G09G1/16
Abstract: A display work station has a rotatable CRT display 18 for presenting data in a vertical and horizontal orientation. The orientation of the CRT display 18 causes activation of the swiiches that control the electronic logic to modify the addressing sequence of data retrieved from a refresh memory so that the data are presented properly on the CRT face.
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公开(公告)号：DE69426345T2
公开(公告)日：2001-05-17
申请号：DE69426345
申请日：1994-09-06
Applicant: IBM
Inventor： ANDERSON TODD BARRY , HAGEN MARK DAVID
Abstract: A phase modulated servo method and apparatus are provided for use in a disk file. The disk file includes at least one disk mounted for rotation about an axis and the disk has at least one disk surface for storing data. At a predefined location of the disk surface a series of servo tracks of a predetermined high gain servo pattern are written. The predetermined high gain servo pattern includes 360 DEG phase difference information within each data cylinder. The servo tracks are detected for identifying servo phase information.
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Patent Agency Ranking
公开(公告)号：DE69426345D1
公开(公告)日：2001-01-04
申请号：DE69426345
申请日：1994-09-06
Applicant: IBM
Inventor： ANDERSON TODD BARRY , HAGEN MARK DAVID
Abstract: A phase modulated servo method and apparatus are provided for use in a disk file. The disk file includes at least one disk mounted for rotation about an axis and the disk has at least one disk surface for storing data. At a predefined location of the disk surface a series of servo tracks of a predetermined high gain servo pattern are written. The predetermined high gain servo pattern includes 360 DEG phase difference information within each data cylinder. The servo tracks are detected for identifying servo phase information.
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公开(公告)号：AT197852T
公开(公告)日：2000-12-15
申请号：AT94480084
申请日：1994-09-06
Applicant: IBM
Inventor： ANDERSON TODD BARRY , HAGEN MARK DAVID
Abstract: A phase modulated servo method and apparatus are provided for use in a disk file. The disk file includes at least one disk mounted for rotation about an axis and the disk has at least one disk surface for storing data. At a predefined location of the disk surface a series of servo tracks of a predetermined high gain servo pattern are written. The predetermined high gain servo pattern includes 360 DEG phase difference information within each data cylinder. The servo tracks are detected for identifying servo phase information.
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公开(公告)号：DE69125447T2
公开(公告)日：1997-09-25
申请号：DE69125447
申请日：1991-09-06
Applicant: IBM
Inventor： BROWN DANA HENRY , CUNNINGHAM EARL ALBERT , ERICKSON KEVIN JACK , ESTRY RICHARD HUNT , GLASER THOMAS WILLIAM , HAGEN MARK DAVID , OTTESEN HAL HJALMAR , PALMER DEAN CURTIS , STEPHENSON JOHN JEFFREY
Abstract: Disclosed is an apparatus and method for correcting for track misregistration when a slider or head assembly contains a separate read element (40) and write element (42). Basically, the offset is determined at a first position and at a second position of the actuator arm (48) assembly. From these offsets a constant and a multiplier are determined for determining an offset as a function of the cylinder location. Also disclosed is a method and apparatus for minimizing distance traveled to prevent misregistration when repositioning between the read element and a write element. The read element is intentionally offset from the write element at an angle so as to minimize the distance traveled across the disk.
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9.发明专利
公开(公告)号：CA2127971C
公开(公告)日：1999-01-12
申请号：CA2127971
申请日：1994-07-13
Applicant: IBM
Inventor： ANDERSON TODD BARRY , HAGEN MARK DAVID
Abstract: A phase modulated servo method and apparatus are provided for use in a disk file. The disk file includes at least one disk mounted for rotation about an axis and the disk has at least one disk surface for storing data. At a predefined location of the disk surface a series of servo tracks of a predetermined high gain servo pattern are written. The predetermined high gain servo pattern includes 360.degree. phase difference information within each data cylinder. The servo tracks are detected for identifying servo phase information.
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公开(公告)号：SG48989A1
公开(公告)日：1998-05-18
申请号：SG1996004947
申请日：1995-01-24
Applicant: IBM
Inventor： BROWN DANA HENRY , HAGEN MARK DAVID , PURKETT JOHN CHARLES
Abstract: A phase modulated servo method and apparatus provide acceptable position linearity for servo positioning with a narrow transducer head in a disk file. The disk file includes at least one disk mounted for rotation about an axis and the disk has at least one disk surface for storing data and has at least one transducer mounted for movement across the disk surface for writing to and for reading data and servo patterns from the disk surface. The transducer includes a read element and a write element. The read element has a width less than the write element and the read element width is greater than ⅓ of a data cylinder and less than ½ of a data cylinder. A servo pattern is written on the data disk surface having a track pitch of less than ½ of a data cylinder and the servo pattern repeats in a selected binary number of data cylinders.
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