Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Synchronizing moving-head moving-record recorders
Patent
1995-06-06
1997-11-11
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Synchronizing moving-head moving-record recorders
360 7306, 360 75, 360 7307, 386 67, 386 80, G11B 2104
Patent
active
056870370
ABSTRACT:
A video tape recorder for long-play mode recording/reproducing includes a capstan servo circuit including a N-multiplying means for inputting a capstan frequency signal and multiplying the input signal by N times, first switching means for switching each signal multiplied by the N-multiplying means according to a mode selecting signal for selecting a mode and down counting means for counting down the output signal of the first switching means, and a drum servo circuit including a synchronization dividing means for receiving a complex synchronous signal and dividing the input signal into a vertical and horizontal synchronous signal, drum reference frequency generating means for receiving the output signal of the synchronization dividing means and generating a drum reference frequency signal, delay means for delaying a drum phase signal by predetermined degrees, 180+.theta..degree. (here, .theta. is positive), and outputting the delayed signal and second switching means for selecting the drum phase signal or the delayed drum phase signal in response to a longest reproducing mode selecting signal. Therefore the recording and reproducing time can be controlled by N-multiplying.
REFERENCES:
patent: 4306254 (1981-12-01), Koda
patent: 4635137 (1987-01-01), Matsumoto
patent: 4656537 (1987-04-01), Toba
patent: 4716473 (1987-12-01), Kondo
patent: 5138504 (1992-08-01), Nishijima
patent: 5291342 (1994-03-01), Kim
Faber Alan
Psitos Aristotelis M.
Samsung Electronics Co,. Ltd.
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