| 摘要 |
PROBLEM TO BE SOLVED: To eliminate mutual interference between tuners by avoiding an increase in a level of an interference wave by an internal oscillation circuit. SOLUTION: An amplifier 141 amplifies a high frequency signal of a TV broadcast wave received by an antenna 2 and outputs the high frequency signal to a balloon transformer 142. The output of the amplifier 141 is distributed in two parts: a high frequency signal to be supplied to a tuner 1 and a high frequency signal to be supplied to a tuner 2 and a TV tuner. Further, the high frequency signal to be supplied to the tuner 2 and the TV tuner being one signal distributed to the two parts is distributed again to a high frequency signal to be supplied to the tuner 2 and a high frequency signal to be supplied to the TV tuner by a balloon transformer 143. By providing the configuration in which such an amplifier 141 is inserted just after the antenna 2, an interference wave by oscillation of an oscillation circuit 14 provided in the tuner 1 is amplified by the amplifier 141 to prevent an adverse effect from being given to the other tuners. COPYRIGHT: (C)2008,JPO&INPIT
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