| 摘要 |
<p>PURPOSE:To attain a log time recording system in preventing the shift in trace angle, by driving intermittently tape feeding at recording, and recording signals during tape running, and making the speed of tape running for recording and reproduction equal with each other. CONSTITUTION:A signal from a drum motor signal generator 1 is converted into a pulse signal with a prescribed pulse width at a monostable multivibrator 2, converted into a differentiating wave at a differentiating circuit 3 and availed as a drum motor PG switching signal. From this switching signal, a signal generated at a capstan rotating signal generator 4 is counted for a prescribed number at a counter 5 to obtain a CTL signal and recorded on a magnetic tape at a CTL head 11. The CTL signal is delayed for a prescribed time at the same time and enters an FF7 as a motor OFF signal. Since the FF7 generates a square wave signal having two stable states with a motor ON switching signal, it intermittently drives a capstan motor 10.</p> |
