Transducer head for rigid disk drive

Details Transducer head for rigid disk drive Transducer head for rigid disk drive

1991-10-30

1993-09-14

Garland, Steven R.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7705, G11B 558, G11B 5596

Patent

active

052454878

ABSTRACT:
A dedicated servo transducer head for phase skewed position information signals in servo information tracks of a rigid magnetic disk drive unit has a width spanning up to eight servo information tracks in order to overcome problems in gain irregularity caused by abrupt phase jumps between tracks. An embodiment of the invention includes a track reading surface that varies in sensitivity across the width of the head to avoid gain loss during incremental radial movement with head edges overlying track edge fringes.

REFERENCES:
patent: 3823416 (1974-07-01), Warner
patent: 4079426 (1978-03-01), Umeda et al.
patent: 4352134 (1982-09-01), Burns et al.
patent: 4402025 (1983-08-01), Anderson et al.
patent: 4488188 (1984-12-01), Hansen et al.
patent: 4490756 (1984-12-01), Dost et al.
patent: 4551777 (1985-11-01), Saito et al.
patent: 4669003 (1987-05-01), Bell et al.
patent: 4890174 (1989-12-01), Chalmers et al.
IBM TDB, vol. 21, No. 2, "Quad-Burst PES System for Disk File Servo", Herrington et al., Jul. 1978, pp. 804-805.
IBM Technical Disclosure Bulletin, vol. 8, No. 4, Sep. 1965, "Readback System for High Track Density . . . ".

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