| 摘要 |
<p>PURPOSE:To reproduce a statisfactory still when connecting picture recording is reproduced, by a simple circuit configuration, by automatically adjusting an operation of a plunger, and instantaneously inputting a noise to a blanking period. CONSTITUTION:A variation of the winding diameter of a tape of a cassette 41 is detected by a tape diameter detecting circuit 42, a detecting signal of the circuit 42 is applied to a variable time constant monostable multivibrator 33 through a delay time setting circuit 43, and a time constant of the multivibrator 33 is varied in accordance with a variation of the tape diameter. An output of this multivibrator 33 is inputted to one terminal of a pause timing circuit 34, to the other terminal of this circuit 34, an output of an amplifier 39 which inputs an output of a pause switch 38 and an output of a servo-circuit 44 is inputted. When both the inputs are present simultaneously from this circuit 34, a pause signal is applied to a pause holding circuit 35, a plunger driving circuit 36 is started by an output of this circuit 35, a plunger 37 is operated, and a position of a pinch roller is controlled. Also, a still is repdocuded satisfactority by instantaneously inputting a noise in the blanking period.</p> |
