| 摘要 |
<p>PURPOSE:To simplify the constitution of the mode selection switch device of the tape recorder by switching the modes with control of FF via the gate output according to the operation buttons and at the same time displaying the mode switched. CONSTITUTION:With operation of play button 1, the output of NAND gate 21 receiving application of the earth potential and the low output of FF51 features a high level. At the same time, FF51 is set by the delayed high-level output delivered from NOR gate 3 and delay circuit 4 and then put under the play mode by the set output and via play circuit 6 and with glowing of the play display lamp simultaneously. With further operation of button 1, the output of gate 21 to which the set output of FF51 and the high-level output are applied continues a low level like in the play mode. And thus FF51 is reset by the delay output given from circuit 4 to secure the stop mode without providing the stop button. The direct switching can be given in the same way between the quick winding, rewinding selection and stop with use of no stop button. Thus the constitution is simplified for the mode selection switch device.</p> |
