| 摘要 |
<p>PURPOSE:To prevent the production of operating mode change due to misoperation of a feather touch type switch, by generating the control output only when the operating time of the push button is long. CONSTITUTION:When the feather touch type switch is kept closing through the operation of playback operating button 2 or the like, the output of the delay circuit 6 of low level in input is inverted into a low level after a given time, and on the other hand, the output of the OR circuit 15 to which a low-level input is fed from a monostable multivibrator 10, is inverted to a low level, and the high-level playback control signal (e) is outputted from the control circuit 20 and the tape recorder is at playback mode. With this mode, if the fast forwarding button 3 is operated in error, the input of the delay circuit 7 is at low level, the monostable multivibrator 10 is triggered, the output of the multivibrator is at high level, and the output of the circuit 16 is not inverted to low level if the operation continuing time of the button 3 is short, the output of the circuit 16 is not inverted to the low level. Thus, the fast forwarding control signal or the like is not produced from the circuit 20, allowing to avoide the mischange production of the operating mode due to misoperation of the feather touch type switch.</p> |
