Zoned equalization for a magnetic disc

Details Zoned equalization for a magnetic disc Zoned equalization for a magnetic disc

1983-11-21

1986-01-14

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

360 65, G11B 509, G11B 545

Patent

active

045648697

ABSTRACT:
Because the lineal speed of a pre-recorded disc relative to a playback head depends on the radial position of the head with respect to the disc, the present invention calls for equalization that correspondingly varies as a function of the radial position of the playback head. Since the recorded tracks of the disc reside in a relatively narrow band about the disc--and because of the relatively large number of tracks within such band--an additional concept of the invention is to divide the band into head-position zones--each such zone corresponding to a different grouping of recorded tracks--and to employ equalization that is respective of the specified zones.

REFERENCES:
patent: 2901737 (1959-08-01), Stovall, Jr.
patent: 4314287 (1982-02-01), Freeman et al.
patent: 4314289 (1982-02-01), Haynes
patent: 4479152 (1984-10-01), Chi

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