Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Synchronizing moving-head moving-record recorders
Patent
1981-10-30
1984-02-21
Faber, Alan
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Synchronizing moving-head moving-record recorders
360 73, 360 77, G11B 2110
Patent
active
044333501
ABSTRACT:
A tracking error detection system in a magnetic reproducing apparatus having M rotary heads where M is an integer and M rotary heads respectively and successively scan over oblique tracks on a magnetic tape to reproduce signals, comprises a head moving mechanism for moving at least one rotary head along a height direction thereof, a head moving signal generating circuit for generating a head moving signal having a square wave shape wherein a rise and a fall are obtained for every M.multidot.T interval, where T is a period in which one rotary head scans one track, and applying the head moving signal to the head moving mechanism, and a detecting circuit for comparing a reproduced signal level at a position separated by a predetermined distance from an end part of a track, of a signal reproduced by scanning the track in a state where the rotary head is moved towards one direction by the head moving mechanism, with a reproduced signal level at a position separated by the above predetermined distance from an end part of another track, of a signal reproduced by scanning the other track in a state where the rotary head is moved towards the other direction, and detecting tracking error.
REFERENCES:
patent: 4148083 (1979-04-01), Watanabe
patent: 4172265 (1979-10-01), Sakamoto et al.
patent: 4184181 (1980-01-01), Mijotovic
Faber Alan
Victor Company of Japan Ltd.
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