| 摘要 |
PURPOSE:To simplify the circuit constitution and to decrease the number of input ports of a mechanism control circuit by using in common an X value setting monostable multivibrator also as a still stop setting monostable multivibrator and providing a prescribed changeover switch. CONSTITUTION:Monostable multivibrator 4', 5' serving as X-value correction and still stop position correction are provided and variable resistors VR1, VR2 are used at still stop position correction and variable resistors VR3, VR4 are used at the X-value correction. Then at recording, an output of an oscillation circuit 3 is subjected to pulse width correction corresponding to the value X by the resistors VR3, VR4, the result is fed to a head 8 via a waveform shaping circuit 6 and a recording amplifier 7 and recorded on a tape as a control pulse. In this case, a drum changeover pulse (d) from an FF 14 is fed to the mechanism control circuit 17 via a switch 28. The switch 28 is used also as the changeover of an audio switching pulse and monostable multivibrator output at reproduction. |
