| 摘要 |
PURPOSE:To compensate automatically fluctuation of a phase quantity due to dispersion in each circuit or component by controlling the phase quantity of a variable phase difference circuit with a phase difference signal between an input signal and a data output of a flip-flop circuit. CONSTITUTION:A phase difference between an input data and an output data of a flip-flop circuit 1 is detected by a phase comparator circuit 7 and the result of detection is integrated by an integration circuit 8 and converted into a DC signal corresponding to a mean phase difference. The DC signal is given to a comparator 9, in which the signal is compared with a reference voltage and a resulting phase difference signal adjusts the phase quantity of a variable phase circuit 10. As a result, a clock signal inputted to the flip-flop circuit 1 is automatically matched with the phase of the input data and a reception signal is sent in a correct phase relation. |
