| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a delay lock loop circuit with a smaller circuit area and a semiconductor integration circuit device installed with the delay lock loop circuit, which address a wide frequency band from a low frequency to a high frequency. <P>SOLUTION: A delay lock loop circuit includes a phase change circuit, a delay line circuit and delay control circuit. The phase change circuit outputs a first signal having a first phase difference with respect to a reference clock inputted therein and a second signal having a second phase difference. A difference between the first and second phase differences shows a predetermined amount of phase delay. The delay line circuit includes a plurality of delay circuits each having a variable unit amount of delay. The delay control circuit controls the unit amount of delay in order for a sum of the unit amounts of delay to be equal to a reference amount of phase delay. <P>COPYRIGHT: (C)2011,JPO&INPIT |
