Servo for VTR drum motor with external reference signal phase mo

Details Servo for VTR drum motor with external reference signal phase mo Servo for VTR drum motor with external reference signal phase mo

1987-06-23

1989-01-31

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 191, 360 331, 360 371, G11B 502

Patent

active

048020320

ABSTRACT:
A servo circuit is provided for use with a reproducing apparatus wherein an information signal is reproduced from an elongated slant track formed on a tape which is wrapped on the periphery of a guide drum having a rotary head. The servo circuit includes a circuit for detecting an intermediate point of the length of the slant track and generating a timing signal at the detection of the intermediate point and a circuit for comparing the timing signal with a reference pulse to generate a control signal. A relative position of the slant track to the rotary head is controlled in accordance with the control signal.

REFERENCES:
patent: 3686469 (1972-08-01), Clark et al.
patent: 3845500 (1974-10-01), Hart
patent: 3964094 (1976-06-01), Hart
patent: 4011587 (1977-03-01), Arter et al.
patent: 4044388 (1977-08-01), Metzger
patent: 4254367 (1981-03-01), Sakamoto
patent: 4285017 (1981-08-01), Arter et al.
patent: 4542351 (1985-09-01), Okada
patent: 4660103 (1987-04-01), Wilkinson et al.
patent: 4665447 (1987-05-01), Odaka
Publication in the Patent Abstracts of Japan, vol. 7, No. 176, Aug. 4, 1983.

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