Tracking apparatus for VCR

Details Tracking apparatus for VCR Tracking apparatus for VCR

1986-12-19

1990-03-27

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 331, 360 102, G11B 558

Patent

active

049125770

ABSTRACT:
A tracking apparatus for a VCR comprises an operational amplifier comparator for comparing a reference voltage with an integrated drum rotation pulse signal. First and second switches are provided to respectively increase and decrease the value of the reference voltage applied to the operational amplifier comparator to respectively decrease and increase the width of a pulse signal produced by the comparator and input to a monostable multivibrator which controls the positioning of a video head relative to an advancing track of a scanned video tape. In this way, tracking adjustment can be performed by remote control and does not depend on the use of variable resistors usually present for the purpose of volume control.

REFERENCES:
patent: 4470079 (1984-09-01), Tsuruta
patent: 4539604 (1985-09-01), Namiki
patent: 4558382 (1985-12-01), Edakubo et al.
patent: 4777543 (1988-10-01), Nishijima et al.

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