Magnetic recording/reproducing apparatus

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head

Reexamination Certificate

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Reexamination Certificate

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07130147

ABSTRACT:
A sync signal time difference detection circuit detects a time difference of reproduced sync signals reproduced by a first head and a second head having different azimuth angles. Rotation of a capstan motor is controlled in accordance with sync signal time difference information output from the sync signal time difference detection circuit, thereby performing a highly accurate tracking control not affected by jitter or eccentricity.

REFERENCES:
patent: 4868692 (1989-09-01), Nakase et al.
patent: 5212603 (1993-05-01), Hasegawa
patent: 5325246 (1994-06-01), Guisinger et al.
patent: 5959799 (1999-09-01), Deoka
patent: 6185062 (2001-02-01), Nonoyama
patent: 55-150129 (1980-11-01), None
patent: 61-3348 (1986-01-01), None
patent: 4-69848 (1992-03-01), None
patent: 5-290456 (1993-11-01), None
patent: 7-29256 (1995-01-01), None
patent: 11-134742 (1999-05-01), None
patent: 11-185324 (1999-07-01), None
International Search Report corresponding to application No. PCT/JP02/05589 dated Jul. 9, 2002.

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