Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1987-11-03
1990-02-27
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 102, 360 744, 360 7305, G11B 15467, G11B 553
Patent
active
049051083
ABSTRACT:
A rotary head type reproducing apparatus wherein, three rotary heads are arranged to be capable of simultaneously tracing different parts of many parallel tracks formed on a record bearing medium, the parts differing from each other both in the transverse and longitudinal directions of the tracks; among the three heads, a first head is positioned in the middle part of each track in the direction of the width thereof; a first tracking error signal is formed to represent a level difference between pilot signals reproduced by the first head from second and third tracks adjoining both sides of a first track which is being traced by the first head; a second tracking error signal is formed to represent a level difference between pilot signals reproduced from the second and third tracks by second and third heads which are other than the first head; and tracking control is accomplished by using both the first and second tracking error signals.
REFERENCES:
patent: 4587581 (1986-05-01), Serafini
patent: 4686589 (1987-08-01), Takimoto
patent: 4743921 (1988-05-01), Sato
Canney Vincent P.
Canon Kabushiki Kaisha
Garland Steven R.
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