| 摘要 |
<p>PURPOSE:To record completely the initiation of a speech by using a phase circuit which outputs the signal of a microphone amplification system with delay of a prescribed time and a monostable multivibrator which outputs the signal of a motor control system in response to the rise and fall of an input signal. CONSTITUTION:Sounds supplied to a microphone Mic are amplified by a wide- band amplifier 201 and transmitted to an ALC circuit 206 of a microphone amplification system as well as to an amplifier 202 of a motor control system. The output of the amplifier 202 that is subjected to amplification of high gain and the limitation of amplitude is supplied to a trigger pulse generating circuit 203. Then a pulse having the width corresponding to a time constant is obtained from a monostable multivibrator 204 at and after a trigger input time point. The vibrator 204 is set forcibly in a sound input state with the output of a rectifier circuit 210. The output of the circuit 206 is outputted through an amplifier 207 and a phase circuit 208. The circuit 208 produces a time lag and compensates the time needed to obtain the control output of the motor control system. Thus it is possible to record completely the initiation of a speech.</p> |
