| 摘要 |
PURPOSE:To obtain a synchronizing signal having extremely high phase accuracy to an external signal regardless of the simple configuration by executing phase correction to the output of a synchronizing signal selection circuit. CONSTITUTION:This phase locked loop is equipped with a synchronizing signal selecting means 5, signal arrival detecting means 60, second delay means 70, delay position discriminating means 600, delay position deciding means 65, internal delay means 720, third delay means 700, delay time selecting means 750, stop signal preparing means 760, source signal selecting means 770 and logic synthesizing means 780. Then, the output signal of the synchronizing signal selection circuit 5 is outputted after correcting the phase based on a trigger signal. Thus, the phase synchronizing circuit to realize the phase and frequency accuracy by using general-purpose active elements can be realized with the simple configuration at low cost. |
