| 摘要 |
PROBLEM TO BE SOLVED: To deliver television signals of a large number of channels at once by means of one television signal transmitter. SOLUTION: The television signal transmitter comprises: a first frequency conversion circuit 3 for converting a television channel signal lower than a television broadcast band into a first intermediate frequency signal higher than the television broadcast band; and a second frequency conversion circuit 6 outputting the first intermediate frequency signal while converting to the television broadcast band. An input amplification circuit 1 for amplifying an input television channel signal is provided at the prestage of the first frequency conversion circuit, and a bandpass filter 4 is provided between the first frequency conversion circuit 3 and the second frequency conversion circuit 6. Bandpass of the input amplification circuit 1 and bandpass of the bandpass filter 4 can transmit signals of a plurality of continuous channels. COPYRIGHT: (C)2006,JPO&NCIPI
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