| 摘要 |
PURPOSE:To decrease the generation of a reproduced code error by identifying and reproducing a detected multi-value base band signal by means of a full wave rectifier system and processing logically an obtained reproducing signal and an error signal so as to correct fluctuation in a DC drift component. CONSTITUTION:The multi-value base band signal 100 inputted to an identification reproducing circuit 3a becomes the 1st output 104 at a subtractor 81 while its DC voltage component is controlled by the 1st control voltage 102. The 1st output 104 is rectified by a full-wave rectifier 5, controlled by the 2nd control voltage 103 at a subtractor 82 and becomes the 2nd output 105. The 1st and 2nd outputs 104, 105 becomes a binary-coded error signal X1 and a binary digital signal X2 by A/D converters 6, 7 and become the 1st and 2nd control voltages via a control circuit 9. |
