| 摘要 |
PURPOSE:To reproduce digital information accurately, by avoiding the digital information having comparatively longer inverting period from being fallen down to zero level for the differentiating signal of the information. CONSTITUTION:A detection signal S'E of digital information via a differentiation circuit 4 is inputted to an input section of the 1st and 2nd level comparators 6 and 7. The comparator 6 synchronizes when the input signal S'E is below or above a reference level (a) and outputs the 1st digital signal SF, and similarly the 2nd digital signal SG is outputted. An AND gate 8 and an OR gate 9 output signals SH and SI respectively. The digital signal SH is inputted to an RS type FF10 via a set terminal S and the digital signal SJ is inputted via a reset terminal R. Thus, a digital signal SK corresponding to the digital information recorded on a recording medium is outputted. Thus, the digital information can be reproduced accurately. |
