| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the degradation of clocks for observing a phase and to accurately adjust the phase by dividing going and coming clock supply paths into plural and connecting them by a circuit for shaping the waveform of the clocks. SOLUTION: External clocks are inputted to a buffer A and outputted through a clock supply path A, the buffer B, the clock supply path B, the buffer C, the clock supply paths C and D, the buffer D, the clock supply path E, the buffer E and the clock supply path F. At the time, the buffers B-E respectively shape and transfer the clocks passed through the clock supply paths A-E and degraded. A phase adjustment device 21 (23) observes the clocks passed through a point A (B) and the point F (E), inputs the clocks passed through the point A (B) and delays the phase until it matches with the phase of the point F (E). Then, the clocks for which the clocks passed through the point A (B) are delayed for the time which is the half of a delay amount when the phase matches are outputted to a circuit part 22 (24). |
