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    DIRECT ACCESS MEMORY DEVICE WITH A MAGNETORESISTIVE TRANSDUCER HEAD
    1.
    发明专利
    DIRECT ACCESS MEMORY DEVICE WITH A MAGNETORESISTIVE TRANSDUCER HEAD 未知

    公开(公告)号：PL320333A1

    公开(公告)日：1997-09-29

    申请号：PL32033395

    申请日：1995-10-21

    Applicant: IBM

    Inventor： COFFEY JEROME THOMAS ,  GOODMAN DALE ERNEST ,  POSS JOE MARTIN

    IPC: G11B21/02 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/17 ,  G11B5/39 ,  G11B5/48 ,  G11B5/60 ,  G11B23/00

    Abstract: A direct access storage device includes at least one disk mounted for rotation about an axis and having opposed disk surfaces for storing data. A magneto-resistive (MR) transducer head is mounted for movement across each respective disk surface for writing to and for reading data signals from the disk surface. Each MR transducer head includes a write element and a read element. A preamplifier, associated with the MR transducer head, amplifies read and write signals of the read element and the write element. A flex cable couples the read and write signals between the preamplifier and the MR transducer heads. The flex cable includes a common read return signal line for each sequential pair of the MR transducer heads.

    2.
    发明专利
    未知

    公开(公告)号：BR9405114A

    公开(公告)日：1995-08-08

    申请号：BR9405114

    申请日：1994-12-15

    Applicant: IBM

    Inventor： CHRISTNER JODIE ANN ,  CUNNINGHAM EARL A ,  KERWIN GREGORY JOHN ,  POSS JOE MARTIN

    IPC: G11B5/39 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/035 ,  G11B5/465 ,  G11B19/02 ,  G11B5/455

    Abstract: In a magnetic data storage device having data recorded in tracks on a media surface and including at least one magnetoresistive (MR) transducer read heads, the adaptive control method for the read head bias current involves determining an optimised bias current value for each MR head. The optimised values are stored, and the active MR head is supplied with a bias current in accordance with the stored value. The optimised bias current value is periodically re-determined for each MR head, and the stored bias current values are revised to correspond with the new optimised bias current values. The bias current values are stored on a disk media surface and are transferred from disk storage to random access memory during the power up sequence of the device.

    3.
    发明专利
    未知

    公开(公告)号：DE69428864T2

    公开(公告)日：2002-05-02

    申请号：DE69428864

    申请日：1994-11-15

    Applicant: IBM

    Inventor： CHRISTNER JODIE ANN ,  CUNNINGHAM EARL A ,  KERWIN GREGORY JOHN ,  POSS JOE MARTIN

    IPC: G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/035 ,  G11B5/39 ,  G11B5/465 ,  G11B19/02

    Abstract: In a magnetic data storage device having data recorded in tracks on a media surface and including at least one magnetoresistive (MR) transducer read heads, the adaptive control method for the read head bias current involves determining an optimised bias current value for each MR head. The optimised values are stored, and the active MR head is supplied with a bias current in accordance with the stored value. The optimised bias current value is periodically re-determined for each MR head, and the stored bias current values are revised to correspond with the new optimised bias current values. The bias current values are stored on a disk media surface and are transferred from disk storage to random access memory during the power up sequence of the device.

    4.
    发明专利
    未知

    公开(公告)号：DE69428864D1

    公开(公告)日：2001-12-06

    申请号：DE69428864

    申请日：1994-11-15

    Applicant: IBM

    Inventor： CHRISTNER JODIE ANN ,  CUNNINGHAM EARL A ,  KERWIN GREGORY JOHN ,  POSS JOE MARTIN

    IPC: G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/035 ,  G11B5/465 ,  G11B5/39 ,  G11B19/02

    Abstract: In a magnetic data storage device having data recorded in tracks on a media surface and including at least one magnetoresistive (MR) transducer read heads, the adaptive control method for the read head bias current involves determining an optimised bias current value for each MR head. The optimised values are stored, and the active MR head is supplied with a bias current in accordance with the stored value. The optimised bias current value is periodically re-determined for each MR head, and the stored bias current values are revised to correspond with the new optimised bias current values. The bias current values are stored on a disk media surface and are transferred from disk storage to random access memory during the power up sequence of the device.

    Individual MR transducer head/disk/channel adaptive bias current system
    7.
    发明专利
    Individual MR transducer head/disk/channel adaptive bias current system 未知

    公开(公告)号：SG42837A1

    公开(公告)日：1997-10-17

    申请号：SG1996000011

    申请日：1994-11-15

    Applicant: IBM

    Inventor： CHRISTNER JODIE ANN ,  CUNNINGHAM EARL A ,  KERWIN GREGORY JOHN ,  POSS JOE MARTIN

    IPC: G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/035 ,  G11B5/39 ,  G11B5/465 ,  G11B19/02

    Abstract: In a magnetic data storage device having data recorded in tracks on a media surface and including at least one magnetoresistive (MR) transducer read heads, the adaptive control method for the read head bias current involves determining an optimised bias current value for each MR head. The optimised values are stored, and the active MR head is supplied with a bias current in accordance with the stored value. The optimised bias current value is periodically re-determined for each MR head, and the stored bias current values are revised to correspond with the new optimised bias current values. The bias current values are stored on a disk media surface and are transferred from disk storage to random access memory during the power up sequence of the device.

    Direct access storage device including mechanism of magneto-resistive transducer head
    9.
    发明专利
    Direct access storage device including mechanism of magneto-resistive transducer head 未知

    公开(公告)号：CZ287651B6

    公开(公告)日：2001-01-17

    申请号：CZ140197

    申请日：1995-10-21

    Applicant: IBM

    Inventor： COFFEY J ROME THOMAS ,  GOODMAN DALE ERNEST ,  POSS JOE MARTIN

    IPC: G11B5/48

    Abstract: The device includes disks mounted for rotation about an axis and having opposed disk surfaces for storing data. A magneto-resistive transducer head is mounted for movement across each respective disk surface for writing to and for reading data signals from the disk surface. Each magneto-resistive transducer head includes a write element and a read element. A preamplifier associated with the magneto-resistive transducer head, amplifies read and write signals of the read element and the write element. A flexible cable couples the read and write signals between the preamplifier and the magneto-resistive transducer heads. The flexible cable includes a common read return signal line for each sequential pair of the magneto-resistive transducer heads.

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