| 摘要 |
An apparatus for reproducing a disc record on which a PCM signal is recorded in run length limited code includes an input terminal for receiving a reproduced signal from the disc record; a detecting circuit for detecting the maximum or minimum transition interval contained in the reproduced signal and for producing a detecting signal in response thereto, and a comparing circuit for comparing the detecting signal with a reference signal corresponding to the maximum or minimum transition interval during the rotation of the disc record at a predetermined velocity, and for producing a control signal in response to said comparisons to be supplied to a servo circuit for controlling the rotation of the disc record.
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