Rotary head type reproducing apparatus having a head shifter for

Details Rotary head type reproducing apparatus having a head shifter for Rotary head type reproducing apparatus having a head shifter for

1984-09-20

1988-10-25

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 102, 360 73, G11B 5588, G11B 5592

Patent

active

047807741

ABSTRACT:
A rotary type reproducing apparatus for reproducing a recorded signal through the tracing of many recording tracks formed at a predetermined pitch on a record bearing medium, one after another, includes a moving apparatus for moving the record bearing medium in a direction which crosses the recording tracks; a shifting apparatus for shifting the rotary head in a direction which crosses the rotation plane thereof; an apparatus for forming a first pulse signal in association with the record bearing meduim moving action of the moving apparatus; an apparatus for forming, on the basis of the first pulse signal, a second pulse signal which is of a higher frequency than the first pulse signal; a counting apparatus for counting the pulses of the second pulse signal; and a control apparatus for forming, on the basis of the counter value of the counting apparatus, a control signal which controls the shifting apparatus. Arranged as such, the shifting apparatus shifts the rotary head using a control signal which is in close proximity to an ideally analogously varying control signal, so that the recording tracks on the medium may be accurately traced.

REFERENCES:
patent: 4489352 (1984-12-01), Kobayashi et al.
patent: 4509083 (1985-04-01), Nakano
patent: 4549234 (1985-10-01), Sakamoto
patent: 4558382 (1985-12-01), Edakubo et al.
patent: 4568986 (1986-02-01), Furuhata et al.
patent: 4573089 (1986-02-01), Maeda et al.
patent: 4644413 (1987-02-01), Takayama
patent: 4665449 (1987-05-01), Kozuki et al.

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