| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a television signal transmitter which can reduce a phase noise. <P>SOLUTION: A television signal transmitter is provided with a first frequency converting portion 4 up-converting a first intermediate frequency signal modulated by a video signal and a voice signal into a second intermediate frequency signal, and a second frequency converting portion 9 down-converting the second intermediate frequency signal into a television channel signal, wherein a first PLL circuit 15 controlling a first local oscillation circuit 3 and an oscillation frequency of the first local oscillation circuit 3 is provided to the first frequency converting portion 4, a second PLL circuit 17 controlling a second local oscillation circuit 8 and an oscillation frequency of the second local oscillation circuit 8 is provided to the second frequency converting portion 9, and the first PLL circuit 15 and the second PLL circuit 17 are composed of a PLL circuit of a fractional system. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
