| 摘要 |
PROBLEM TO BE SOLVED: To provide a DLL circuit which has high resolution, a wide capture range and high speed synchronization. SOLUTION: The DDL circuit is provided with a first control signal generating means and a second control signal generating means. The first means has an analog delay line 114 and a digital control circuit 118, and coarsely adjusts a delay time of the analog delay line 114 by digital control, according to the phase difference between an input signal and a feed back signal. The second means adjusts the delay time finely and continuously. |
