| 摘要 |
<p>PURPOSE:To eliminate the need for pushbutton operations such as fast feeding, rewinding, etc. by providing a counting means of tape running quantity, a memory means of set values and a means of comparing the count contents and the contents of the memory means. CONSTITUTION:The outputs of a reel rotation detector 1 are counted and stored with a counter 2 and stopping after fast feeding and rewinding or assignment of the position for reproduction by a counter setting keyboard is stored in a counter 4. The outputs of the counters 2, 4 are subtracted in a subtraction circuit 8. In the case of (reel rotation detection value) > (set value), ''1'' is outputted from the circuit 8 and sets a rewinding F/F 10 which in turn actuates a rewinding drive mechanism 11, thereby performing rewinding. In this case, the output having passed through an inverter 17 is inputted to a fast feed F/F 12 and therefore a reset state is set and a fast feed drive mechanism 13 does not actuate. A reproduction F/F 14 and a reproduction drive mechanism 15 are also in similar states. Thereby, the tape may be fast fed or rewound up to and stopped at the desired position and reproduction performed without making button operations.</p> |
