Automatic tracking control for magnetic recording and/or reprodu

Details Automatic tracking control for magnetic recording and/or reprodu Automatic tracking control for magnetic recording and/or reprodu

1988-08-04

1992-04-21

Faber, Alan

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Synchronizing moving-head moving-record recorders

360 7753, G11B 2104

Patent

active

051073811

ABSTRACT:
An automatic tracking control system for use in a magnetic recording and/or reproducing apparatus, which system includes a servo control circuit for controlling a tracking phase of a rotary head assembly; a search control circuit for causing the servo control circuit to vary the tracking phase in a predetermined quantity thereby to make a search so as to reciprocate within a predetermined tracking phase area; a detecting circuit for detecting envelope voltage values of an audio signal and a video signal reproduced for each search point and summing such signals together to provide a composite envelope value; and a reference tracking phase setting circuit for detecting the tracking phase, at which an optimum tracking can be attained when the reproduced signals are integrated from the composite envelope value, thereby to set a reference tracking phase which provides a reference value to the servo control circuit.

REFERENCES:
patent: 4055849 (1977-10-01), Hickok
patent: 4104684 (1978-08-01), Wakami et al.
patent: 4127881 (1978-11-01), Wakami et al.
patent: 4568986 (1986-02-01), Furuhata et al.
patent: 4581658 (1986-04-01), Azuma et al.
patent: 4607293 (1986-08-01), Okada et al.
patent: 4760475 (1988-07-01), Wong et al.

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