| 摘要 |
PROBLEM TO BE SOLVED: To provide a CS tuner in which an interference wave based on a BS signal or the like is reduced and receiving interference of CS broadcasting is prevented. SOLUTION: A filter 29 for removing the BS signal is provided between the output terminal of an amplifier 21 on the first stage of the CS tuner and the input terminal of an AGC circuit 24 and when it is judged that a receiving frequency is equal to or higher than 1385 MHz in the case of receiving CS broadcasting, switches SW1 and SW2 are changed over to the side of contacts b1 and b2 to pass a received signal through the filter 29. Thus, since the BS signal in the received signal is removed before the received signal is inputted to an amplifier on the middle stage and a mixer circuit, the interference wave (high-order distortion) based on the BS signal in a cooperative receiving system is reduced and the receiving interference is prevented. COPYRIGHT: (C)2004,JPO
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