| 摘要 |
Circuit means are provided for detecting velocity errors in the rotational speed of a turntable employed to rotate a video disc. The circuit means provide a corrective error signal which is processed and applied to an electro-mechanical transducer to which the pickup arm is mounted. The transducer imparts a corrective longitudinal motion to the pickup arm to maintain the relative velocity between the pickup stylus and the groove at a predetermined value.
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