Tracking control device for a video tape recorder

Details Tracking control device for a video tape recorder Tracking control device for a video tape recorder

1992-04-09

1993-12-28

Koczo, Michael

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7713, G11B 5592

Patent

active

052745155

ABSTRACT:
A tracking control device for controlling the positions of magnetic heads mounted on bimorphs relative to a recording medium. The device comprises means for detecting the transport speed of the recording medium; means for generating a first drive signal in response to the output of the speed detecting means; means for detecting the position of the recording medium; means for generating a second drive signal in response to the output of the position detecting means and the output of the speed detecting means; means for detecting any track deviation in response to the output of each head; means for generating a third drive signal in response to the output of the deviation detecting means; means for adding the first, second and third drive signals; and means for supplying the output of the adding means to the relevant bimorph; wherein at least two of magnetic heads are so disposed as to have an offset therebetween, and the drive signal generating means are controlled on the basis of the difference between the envelope signals outputted from the heads. In this device, proper tracking can be ensured continuously despite any external factors of disturbance.

REFERENCES:
patent: 4825311 (1989-04-01), Saito
patent: 5057949 (1991-10-01), Suga et al.
patent: 5072319 (1991-12-01), Kohri et al.
patent: 5210663 (1993-05-01), Nakase et al.

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