Tracking servo system for disc memory

Details Tracking servo system for disc memory Tracking servo system for disc memory

1986-03-06

1987-10-20

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

G11B 5596

Patent

active

047018151

ABSTRACT:
A servo system for positioning a data transducer head relative to a plurality of substantially concentric data tracks on the surface of a magnetic disc including a pair of servo transducer heads for sensing the data tracks and generating output signals representative of a data signal written on the sensed track, a distance between the pair of servo transducer heads being related to the dimension of the data track and a distance between the servo transducer heads and the data transducer head being related to a data track pitch, a signal processing circuit connected to the pair of servo transducer heads for generating a data transducer head positioning signal and a positioning device for positioning the data transducer head in response to the transducer positioning signal and for maintaining the track centerline alignment of the data transducer head.

REFERENCES:
patent: 3034111 (1962-05-01), Hoagland et al.
patent: 3277440 (1966-10-01), Gouilloud et al.
patent: 4165523 (1979-08-01), Hathaway
IBM Technical Disclosure Bulletin, vol. 20, No. 9, Feb. 1978, pp. 3673-3674, Read/Write Servo Magnetic Head, D. McEfee.
IBM Technical Disclosure Bulletin, vol. 3, No. 11, Apr. 1961, p. 57, Positioning System, J. Hildebrand.
IBM Technical Disclosure Bulletin, vol. 15, No. 3, Aug. 1972, pp. 752-753, Discrete Magnetic Recording System, L. Shew.
IBM Technical Disclosure Bulletin, vol. 16, No. 6, Nov. 1973, pp. 1821-1823, R. Comstock et al, Triple-Layer Magnetic Recording Track Following Servo Concept with Alternating Single Frequency Servo Tracks.
IBM Technical Disclosure Bulletin, vol. 25, No. 2, Jul. 1982, pp. 778-779, Re-Recordable Servo System for Multi-Track Tape, T. Schwarz.
IBM Technical Disclosure Bulletin, vol. 15, No. 4, Sep. 1972, pp. 1320-1321, Servo Control of Multielement Magnetic Heads, V. Zimmermann et al.
IBM Technical Disclosure Bulletin, vol. 17, No. 2, Jul. 1974, pp. 456-457, Magnetic Disk Servo Control Device, V. Zimmermann et al.

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