| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of signal lines between a reception main body side including a tuner and an antenna amplifier and to facilitate the wiring work of a signal line group when a common antenna is used. SOLUTION: The antenna amplifier 10A is provided with a switch 3 which is connected to the common antenna 2 and changes over a switch 4 side output and an FM filter 5 side output, a switch 4 which is connected to an antenna 1 and the switch 3, changes over a reception signal from the antenna 1 and an output signal from the switch 2 and outputs it to a TV filter 6 side, and a diversity signal detection circuit 12 monitoring a diversity switch signal S2 with respect to a TV signal inputted from the tuner 20 and changes over the switch 3 to a switch 4 side by interlocking it to a case when the diversity switch signal S2 is detected. COPYRIGHT: (C)2004,JPO
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