| 摘要 |
A television tuner comprises a tuner unit to which a cable and an FM broadcasting receiving antenna are connected, for frequency converting each of a television broadcasting signal, an FM broadcasting signal, and a ground wave FM broadcasting signal into an intermediate frequency signal and outputting the intermediate frequency signal, an intermediate frequency circuit unit for outputting an audio intermediate frequency signal and a video intermediate frequency signal, a demodulator, a pseudo carrier wave oscillator for outputting a pseudo carrier wave having the same frequency as that of the video intermediate frequency signal, switching means, and a switching control unit for supplying a switching voltage, wherein when the tuner unit receives the FM broadcasting signal or the ground wave FM broadcasting signal, the pseudo carrier wave is supplied to the demodulator.
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