Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1997-11-28
2000-08-15
Loomis, Paul
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 7308, G11B 5584
Patent
active
061045675
ABSTRACT:
A tracking apparatus for a helical scan magnetic recording/reproducing system includes a rotation speed controller for controlling the rotation speed of a capstan motor which transports a magnetic tape, a speed deviation generator for applying a deviation to the rotation speed, an envelope level detector for detecting the envelope level of a reproduced signal, a memory for storing the value of detection by the envelope level detector, and an envelope level comparator for comparing envelope levels before and after the deviation is applied to the rotation speed, whereby the rotation of the capstan motor is controlled so that the envelope level becomes a value in the vicinity of a maximum value. The tracking apparatus further includes a steady speed deviation detector for detecting a steady speed deviation between a recording apparatus and a reproducing apparatus, and a steady speed deviation corrector for correcting the detected speed deviation.
REFERENCES:
patent: 4541020 (1985-09-01), Kimura
patent: 4613914 (1986-09-01), Kobori et al.
patent: 4618899 (1986-10-01), Doutsubo
patent: 4647990 (1987-03-01), Sasamura
patent: 4777543 (1988-10-01), Nishijima et al.
patent: 5270873 (1993-12-01), Sakai et al.
patent: 5727113 (1998-03-01), Shimoda
Abe Hiroya
Kaniwa Kouji
Minabe Kouji
Narita Yoshio
Nishijima Hideo
Hitachi , Ltd.
Loomis Paul
Neal Regina Y.
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