| 摘要 |
<P>PROBLEM TO BE SOLVED: To reliably and selectively receive a plurality of standard radio waves different in frequency in Japan and foreign countries. <P>SOLUTION: A reception module for radio wave clock includes a receiving part 3 having a tuning circuit 7 comprising a varactor 6, so as to selectively receive one of a plurality of standard radio waves being different in frequency; a filter part 18 having a plurality of filters 18a-18f respectively corresponding to the standard radio waves, so as to allow the selectively received standard waves to pass; a varactor driving part 8 for varying a DC voltage to be applied on the varactor 6 and changing the tuning frequency of the tuning circuit 7; and a lock part 9 for receiving a signal, which indicates a prescribed station selecting operation termination by the receiving part 3, so as to lock the driving state of the varactor driving part 8. Then the standard radio waves being different in frequency in Japan and the foreign countries are selectively received. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
