| 摘要 |
The circuit of the present invention prevents a multi-locking phenomenon, reduces power consumption and provides an accurately locked internal clock signal. A delay unit sequentially delays an external clock signal through a plurality of unit delay terminals. A sampling and computation unit maintains the levels of signals from the unit delay terminals connected after a predetermined unit delay terminal, in which a locking phenomenon occurs, to a predetermined level when a delay clock signal among a plurality of delay clock signals from the unit delay terminals is locked. An output unit outputs a delay clock signal locked to an external clock signal in accordance with an output from the sampling and computation unit. |
