| 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 by a frequency divider 6 is further reduced to several Hz to 1 Hz with a frequency divding circuit 15. The output signal of said frequency dividing circuit 15 is applied to an AND circuit 16. To this AND circuit 16 is applied the output signal of a memory circuit 14 which has stored the reproduction command by a reproduction command signal 13, whereby AND is taken. A driving circuit 17 is driven by the output of this circuit 16, whereby a light emitting body is lighted. In this way, the light emitting body may be flashed at the reproducing and recording 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. At the same time, highly accurate revolution stability and superior wow and flutter characteristics may be obtained.</p> |
