| 摘要 |
PURPOSE:To prevent mis-detection of an address mark by resetting the 1st latch circuit when the number ''I'' continues for a predetermined m bits or over by only adding a simple circuit. CONSTITUTION:Address mark data and a clock pulse are inputted to a flip-flop circuit 11. An output of the 1st latch circuit 52 is used as a reset signal F1 and an output of the flip-flop circuit 11 and the address mark data are ANDed and the result is fed to a flip-flop circuit 13 via an AND circuit 12. When the address mark data ''1s'' are consecutive for >=2 bits, the result is treated as a reset signal and fed to the 1st latch circuit 52. |
