RECORDING AND REPRODUCING CIRCUIT

RECORDING AND REPRODUCING CIRCUIT

PURPOSE:To always obtain a stable control characteristic by revising the gain of a rotation control system according to the output of a disk detection means and revising the integration constant of a stop circuit system according to the output of a disk size detection means. CONSTITUTION:The informa...

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Hauptverfasser: TSUJI SEIZO, MASUDA WATARU
Format: Patent
Sprache:eng
Schlagworte:
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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creator TSUJI SEIZO
MASUDA WATARU
description PURPOSE:To always obtain a stable control characteristic by revising the gain of a rotation control system according to the output of a disk detection means and revising the integration constant of a stop circuit system according to the output of a disk size detection means. CONSTITUTION:The information of the presence and the size of a disk are converted into a stable DC level by level detectors 33, 34 to be inputted to a disk size detection circuit. At this time, a switch 40 is operated according to the disk size, and the deterioration in the control characteristic due to the disk size is prevented by revising a phase compensation characteristic. By a waveform shaping circuit 45, the output of a rotation detector 24 is pulse formed to be inputted to an integration circuit 46. By the level detector 48, a switch circuit 42 is opened and operated so that no brake signal is impressed to a motor when the fact that the output of the integration circuit 46 becomes a below set level is detected.
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CONSTITUTION:The information of the presence and the size of a disk are converted into a stable DC level by level detectors 33, 34 to be inputted to a disk size detection circuit. At this time, a switch 40 is operated according to the disk size, and the deterioration in the control characteristic due to the disk size is prevented by revising a phase compensation characteristic. By a waveform shaping circuit 45, the output of a rotation detector 24 is pulse formed to be inputted to an integration circuit 46. 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CONSTITUTION:The information of the presence and the size of a disk are converted into a stable DC level by level detectors 33, 34 to be inputted to a disk size detection circuit. At this time, a switch 40 is operated according to the disk size, and the deterioration in the control characteristic due to the disk size is prevented by revising a phase compensation characteristic. By a waveform shaping circuit 45, the output of a rotation detector 24 is pulse formed to be inputted to an integration circuit 46. By the level detector 48, a switch circuit 42 is opened and operated so that no brake signal is impressed to a motor when the fact that the output of the integration circuit 46 becomes a below set level is detected.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record>
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subjects INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
title RECORDING AND REPRODUCING CIRCUIT
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