| 摘要 |
A tuner is provided to filter a high frequency signal, outputted by a high pass filter and an intermediate frequency trap, through each band pass filter of a band pass filter unit by band and synchronize the high frequency signal through an input sync circuit corresponding to a filtered band, thereby reducing mutual interference between bands to prevent the deterioration of signal sensitivity. A tuner comprises a band pass filter unit by band(22) and input sync circuits(23,24,25). The band pass filter unit filters a high frequency signal received from an antenna by band. The input sync circuits synchronize each of frequency signals filtered by band. The band pass filter unit by band includes first, second, and third band pass filters(221) and a switching unit(220). The first, second, and third band pass filters filter only frequency signals within a band corresponding to first, second, and third bands. The switching unit outputs the high frequency signal to a corresponding band pass filter according to a selected band.
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