| 摘要 |
PURPOSE:To increase a reproducing speed by setting up the feeding length and stop period length of a magnetic tape optionally to increase the ratio of the feeding length to the intermittent driving period of the magnetic tape. CONSTITUTION:If it is defined that the frequency dividing ratio of a frequency divider 20 is 1/N and that of a frequency divider 23 is 1/M, a video head switching signal (a) is divided at its frequency by 1/N and an FF21 is set up at the leading edge of the divided signal (b). On the other hand, a control signal (c) is divided at its frequency by 1/M, the divided signal (d) triggers a monostable multivibrator 22 and a signal (e) from the circuit 22 is supplied to the FF21 to reset the FF21 at the trailing edge of the signal (e). Therefore, a signal (f) to be raised at the leading edge of the signal 20 and decayed at the trailing edge of the signal (b) is obtained from the FF21 and a capstan motor 9 is driven through a changeover switch 18 and a driving circuit 17. A stop signal for the motor 9 is controlled by dividing the control signal (c) by the frequency divider 23 and the feeding length of the magnetic tape in one operation is determined by the frequency dividing ratios 1/N and 1/M. The slow motion reproducing speed is expressed by M/N, so that quick slow motion reproduction can be attained by selecting the frequency dividing ratios 1/N and 1/M optionally.
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