To provide a tuner device that can in common receive a satellite digital television broadcast program and a terrestrial television broadcast wave.
When receiving a satellite television broadcast, an intermediate frequency signal SIF1 is supplied to a quadrature detection circuit 45, an oscillation signal is supplied from an oscillation circuit 46 to the quadrature detection circuit 45 and base band signals SI, SQ are extracted from the intermediate frequency signal SIF1. In the case of receiving a terrestrial television broadcast or a cable television broadcast, the broadcast wave signal of the terrestrial television broadcast or the cable television broadcast is fed to the mixer circuit 53 where the broadcast signal is frequency-converted into the 1st intermediate frequency signal SIF1 of the band of the intermediate frequency signal SIF1 at the reception of the satellite broadcast program. The 1st intermediate frequency signal SIF1 is supplied to the quadrature detection circuit 45 and supplied from the oscillation circuit 46 to the quadrature detection circuit 45 and the 1st intermediate frequency signal SIF1 is frequency-converted into a 2nd intermediate frequency signal SIF2.
| JP4547361 | Power generation system |
| JP3205232 | BEACON RECEIVER |
| JPS52113667 | MODULATOR AND DEMODULATOR |
YAMAUCHI TOSHIYUKI
OTANI KOICHI
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