| 摘要 |
<p>PURPOSE:To obtain the titled circuit which is excellent in operability and optimum in case it is used as a dictating machine for sound-recording a short sentence one after another by constituting it so that a long or short sound recording operation time can be selected by a difference of the operation time of a sound recording operation button. CONSTITUTION:When a sound recording switch 1 is closed for a short time, an H signal is supplied to the input terminal 6 of a controlling circuit 5, and the controlling circuit 5 is inverted to an operating state. An L signal is outputted to an output terminal 7; a switching transistor TR12 is inverted to a conducting state, a power source is supplied to a sound recording circuit 11, and the sound recording circuit 11 goes to an operating state. When a stopping switch 9 is closed, an H signal is supplied to a reset terminal 8 of the controlling circuit 5 through the stopping switch 9, the controlling circuit 5 is inverted to a non-operating state, an H signal is outputted to the output terminal 7, the TR12 is inverted to a non-conducting state, the power source supply to the sound recording circuit is cut, and a recorder stops. A long or short sound recording time can be selected by the difference of the operation time of the sound recording operation button, therefore, this circuit is excellent in operability and optimum as a sound recording switching circuit of a decoder used instead of a memo.</p> |
