Turn around method and circuit

Details Turn around method and circuit Turn around method and circuit

1975-02-14

1976-05-18

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 29, 360 72, G11B 1518, G11B 1544, G11B 2340

Patent

active

039582728

ABSTRACT:
A video tape recorder wherein the video signal is recorded on the tape as a frequency-modulated signal. The video recorder comprises a transport for the tape which is constructed suitably for reversing the direction of tape movement during signal recording and reproducing. The video signals are successively transduced on or from longitudinally extending parallel tracks on the tape. Initiating of the reverse movement of tape is improved by the use of a special high frequency signal. Said frequency also could be higher than the upper frequencies which can still be transduced by the used magnetic head at playback. Easily manufactured circuits are provided for the highly accurate detection of the special high frequency signal. Said frequency should be in a higher frequency range than the highest frequency of the video signals, more exactly above the white level of the video signals.

REFERENCES:
patent: 3403221 (1968-09-01), Van Den Bussche
patent: 3461249 (1969-08-01), Kamoji et al.
patent: 3487175 (1969-12-01), Newell
patent: 3557320 (1971-01-01), Hopf
patent: 3573393 (1971-04-01), Blackie
patent: 3702908 (1972-11-01), Sugiura

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