| 摘要 |
PURPOSE:To simplify a circuit configuration and to maintain the stability of an operation, by constituting so that the element is constituted of a variable phase shifter having one control element, and a logical element, in a relative delayed extent adjusting circuit of an NRZ signal between multidigital transmissions in the digital transmission system. CONSTITUTION:A frequency dividing circuit 106 divides an input clock pulse 4 into (n), and the first pulse shaping circuit 101 shapes a waveform of an input NRZ signal 1 by the pulse 4. A series parallel converting circuit 104 makes a signal 2 of the circuit 101 branch to (n) rows by a clock pulse 7 of the circuit 106. A variable phase shifter 103 shifts and varies phase of the pulse 7 of the circuit 106. A parallel-series converting circuit 105 converts an NRZ signal 8 of the circuit 104 in reverse to one row by a clock pulse 9 of the phase shifter 103, and outputs an NRZ signal 3 havng a variable phase-shifting extent of (nXphi) (rad). An (n) multiplying circuit 107 multiplies the pulse 9 of the phase shifter by (n), and outputs a clock pulse 5. |
