Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Synchronizing moving-head moving-record recorders
Patent
1983-11-23
1985-09-03
Stellar, George G.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Synchronizing moving-head moving-record recorders
360 103, G11B 5008
Patent
active
045396060
ABSTRACT:
A magnetic reproducing apparatus having a capstan servo circuit, comprises rotary heads for reproducing a recorded video signal from tracks which are formed obliquely to the longitudinal direction of a magnetic tape, a drum motor for rotating the rotary heads, and a capstan motor for rotating a capstan which drives the magnetic tape to travel. The capstan servo circuit comprises a detecting circuit for detecting a rotation of the rotary heads, and for producing a detection signal which is in accordance with the rotation of the rotary heads, a reference signal generator for generating a reference signal, a synchronizing circuit for synchronizing the phase of the reference signal from the reference signal generator and the phase of the detection signal from the detecting circuit during a high-speed reproducing mode of the reproducing apparatus, a control head for reproducing a recorded control signal from the magnetic tape, a phase comparator for comparing the phase of the control signal which is reproduced by the control head and the phase of the reference signal from the reference signal generator, and a control circuit for controlling a rotation of the capstan motor by an output signal of the phase comparator.
REFERENCES:
patent: 3663764 (1972-05-01), Trost et al.
patent: 4127881 (1978-11-01), Wakami et al.
patent: 4167023 (1979-09-01), Bessette et al.
patent: 4486794 (1984-12-01), Itoh
Stellar George G.
Victor Company of Japan Ltd.
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