| 摘要 |
PROBLEM TO BE SOLVED: To provide a television receiver without causing any Nyquist buzz. SOLUTION: This television receiver 1 is provided with an extracting circuit 30, and the components of modulation waves are extracted from the output signal of a video wave detecting part 8. A carrier reproducing part 7 is constituted so that carrier waves can be extracted from an IF signal by a PLL loop consisting of an APC wave detecting part 10, a first low pass filter 11, and a voltage control oscillator 12. The components of the extracted modulation waves are added to the output of the APC wave detecting part 10 by an adding circuit 23 in the carrier wave reproducing part 7, and the carrier waves after the components of the modulation waves are removed and outputted through the first low pass filter 11 to the voltage control oscillator 12. Thus, any side lobe can not be included in carrier waves to be outputted from the voltage control oscillator 12 through a phase shifter 13, and a clear waveform can be obtained. The IF signal is demodulated by the carrier waves, so that any Nyquist buzz is not caused at the time of demodulating the audio IF signal. Thus, a clear audio signal without any noise can be outputted.
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