| 摘要 |
PURPOSE:To ensure generation of the autoreurn signal at the final silence groove position by securing the logic product of the output between the 1st detection means which detects the position of the record stylus tip and the 2nd detection means which detects the presence or absence of the electric signal picked up into the circuit. CONSTITUTION:The 1st detection means 1 is set to generate the H signal is case the record stylus tip is within the fixed range from the center of the record and then the L signal otherwise respectively. And the 2nd detection means 2 decides the presence or absence of the electric signal picked up through the record, and generates the L and H signals when the electric signal exists and no electric signal exists each. Then AND circuit 3 secures the logic product of the output signals sent from means 1 and 2, and then generates the output signal only when the both output signals feature H. This output signal is then used for the autoreturn signal. |
