Control of auto-tracking in tracking-error correcting system of

Details Control of auto-tracking in tracking-error correcting system of Control of auto-tracking in tracking-error correcting system of

1982-11-04

1986-05-20

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Record editing

360 77, H04N 578

Patent

active

045905231

ABSTRACT:
A tracking-error correcting system in a rotary head magnetic recording and reproducing apparatus in which reproducing magnetic heads are mounted on a respective bimorph leaf having piezoelectric elements so as to be movable in the direction of the axis of rotation. The piezoelectric elements are controlled by a control voltage which is produced by adding a signal from an auto-tracking circuit and a signal from a triangular wave generating circuit. In a reproducing mode at a tape speed which is different from a tape speed in recording mode, this system activates the auto-tracking circuit when the control voltage level is within a limited range which is detected by a control voltage detector. Also, this system stops the auto-tracking circuit during a transition period when the reproduction mode changes.

REFERENCES:
patent: 4167763 (1979-09-01), Kubota
patent: 4255771 (1981-03-01), Kubota
patent: 4403260 (1983-09-01), Kawamura et al.

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