| 摘要 |
PURPOSE:To facilitate a self-clock by performing coding and decoding after securing the correspondence between the 8-bit data and a prescribed 17-bit code. CONSTITUTION:A prescribed 17-bit code is stored in an address 255 from an address 0 of a ROM102. When the data series are supplied to a shift register 100 from an input terminal (a), an address corresponding to the data is designated with the ROM102. Then the stored 17-bit code is read out to the designated address and then supplied to a shift register 103 to be delivered through a code output terminal (b). Thus adverse conversion is carried out in a decoding mode after the coding is through. As a result, the minimum reverse interval is set at 1.41T together with the maximum reverse interval and the detection window width set at 5.18T and 0.47T respectively (T: data bit interval). This facilitates a self-clock. |
