| 摘要 |
PROBLEM TO BE SOLVED: To provide a lock detection circuit, a delay-locked loop circuit and a reception circuit which operate stably even in an initial state.SOLUTION: In an embodiment, the lock detection circuit includes an initial state response circuit for, when a pulse width modulation signal is not input, stopping a charge pump from outputting a second control signal, and outputting to delay lines a third control signal to control a delay amount of an entire delay circuit such that the delay amount is included in any one of a range where an OVER signal generation circuit is operable, a range where an UNDER signal generation circuit is operable, and a range higher than an UNDER threshold and lower than an OVER threshold. |
