| 摘要 |
<P>PROBLEM TO BE SOLVED: To shorten the period of time required for a simplified and sure lock-in, regarding a PLL circuit and a reproducing device, when applied to a video tape recorder with a non-tracking method, for example. <P>SOLUTION: Feed back control on a PLL circuit 9 is limited, by comparing first and second deciding clocks (TH1, TH2) by the highest frequency and the lowest frequency, which can be measured by a clock CK, by means of a reproducing signal DRF. <P>COPYRIGHT: (C)2004,JPO |
