| 摘要 |
<p>PURPOSE:To prevent such a defect that an undesired music is mistakenly reproduced in case a switch is pushed in a period of the music interval signal, by providing a detector for music interval and an integration circuit which delays the output of the detector. CONSTITUTION:A music interval signal B is changed to a high level, and a play signal is delivered from a comparator 11. Then a driver 17 is shifted to a reproduction mode, and a reproduced signal A is delivered. The output B of a detector 3 is changed to a low level. The output D of a gate circuit 5 is applied to gate circuits 14 and 15 after passing through an integration circuit 6. The operations of switches 12 and 13 are effective only in a control switch accepting period for the circuits 14 and 15. When the 1st switch 12 is closed, the output of the circuit 14 sets a mechanism control circuit 16 under a review state through a gate circuit 19.</p> |
