| 摘要 |
<p>PURPOSE:To operate efficiently two tape reproducing devices continuously or alternately, by stopping running of the first tape, and also starting running of the second tape when the no-signal state is continued for a certain time from the time point of the break of a sound recording signal of the first tape. CONSTITUTION:When the reproduced signal of the first tape 2 is broken at a time t2, the output of a waveform shaping circuit 10 is lowered at a time t3 from a certain time of (t) seconds which is determined by the time constant of an integrating circuit consisting of a resistance 8 and a capacitor 9, and then, a negative pulse generated by a differentiating circuit is inputted to a transistor TR13. Then, a bistable multivibrator 17 is inverted, and a TR14 is turned on, and a motor 26 is stopped to stop running of the first tape 2, and a motor 27 starts rotating to start running of the second tape 4. When the reproduced signal of the second tape reproducing device 3 is broken, a negative pulse is inputted to the TR14, and the bistable multivibrator 17 is inverted again, and the first tape reproducing device 1 starts reproducing.</p> |
