| 摘要 |
<p>PURPOSE:To eliminate inconvenience of reproduction with missing head of information by changing to a rewinding mode when specified data are detected from index data in a quick traversing mode, and changing to a reproducing mode when specified number of detected index data is counted. CONSTITUTION:In the quick traversing mode, reset of a counter 6 is released by a coincidence signal Det impressed from an index data detecting circuit 4 and becomes a movable state, and counts pulses of index data generated in the output of a waveform shaping circuit 3 impressed to input, and when the counting becomes a specified value, outputs a signal Cout. The pulse train of index data is reproduced from the direction of the arrow (b). When the coincidence with data determined by an index data detecting circuit is detected, a coincidence signal Det is outputted synchronizing with the fall of pulse P1 of a queue signal. As this signal actuates a reproduction plunger driving circuit 5 through a switch REW, the reproduction is performed before the index data.</p> |
