| 摘要 |
PURPOSE:To apply a system for high speed transmission by discriminating only a cross timing coincident with the identification point of a multivalue signal, outputting the clock of a baud rate synchronously with the cross timing and identifying the data from the multivalue signal with the clock. CONSTITUTION:Zero cross timings of (N-1) kinds are detected from an N-value signal by a zero cross detection section 2. A PLL 3 generates the clock of (N-1)-fold a baud rate to be synchronously with all zero cross points. Moreover, a frequency divider 4 generates (N-1)-fold baud rate clocks different from the phases from the (N-1)-fold clock. Then a discrimination section 5 uses the output data of an identification device 02 to select one of baud rate clocks. Thus, when a multivalue transmission code is applied, the correct clock is extracted and the system is applied to the high speed transmission of several mega-bit per second or above. |
