| 摘要 |
<p>PURPOSE:To obtain highly accurate revolution stability by flashing a light emitting body at the reproducing and recording by means of the output which comprises dividing the crystal oscillation frequency used for the control reference of a quartz lock direct drive motor down to low frequencies. CONSTITUTION:The output which comprises reducing the oscillation frequency of a crystal oscillator 5 used for the control reference of the motor with a frequency divider 6 is further reduced to several Hz to 1 Hz with a frequency divider 16. The output signal of said frequency dividing circuit 16 is applied to an AND circuit 17. In this AND circuit 17, the output signal of a window comparator 7 is applied to the output of a memory circuit 15 which has stored the reproduction command by a reproduction command switch 14, whereby AND is taken. A driving circuit 18 is driven by the output of this circuit 17, whereby a display body is lighted. In this way, the light emitting body may be flashed only within the phase control range in the reproducing and recording state by directly dividing down the crystal oscillation output used for controlling of the motor and it may be displayed that the apparatus is in the recording and reproducing state.</p> |
