| 摘要 |
PURPOSE:To attain a binary circuit without an error, by inputting an electric signal from a sensor to an integrating circuit, and inputting the integrated output to an effective area discriminating circuit, in a binary circuit of a floating slice level system. CONSTITUTION:Since an integration circuit 63 is inserted between an input terminal 1 and an effective area discriminating circuit 2, a pickup signal is integrated at an integration circuit 63 and sliced at a slice SL at the circuit 2 and convereted into an effective signal 59'. Thus, the notch in the effective signal caused by a ditch A to PP pit of pickup signal can be avoided. As a result, a pat mark slice signal 58' has a correct slice level to the pickup signal and a pat mark signal PS becomes a pat mark signal to be obtained. |
