| 摘要 |
PROBLEM TO BE SOLVED: To provide a tuner which sufficiently removes disturbance waves without increase of a circuit size and a production cost. SOLUTION: The tuner is provided with: a receiving part 100 which receives a broadcasting signal, and outputs a received signal; a mixer circuit 15 and a mixer circuit 17 which perform frequency conversion from the received signal to an IF signal; a SAW filter 22 which attenuates frequency components other than the IF signal; and an analog broadcasting demodulation circuit 23 which demodulates the IF signal in which frequency components other than the IF signal are attenuated. The tuner is further provided with: a tank circuit 50 which tunes to the IF signal received from the mixer circuit 15 and the mixer circuit 17 between the mixer circuit 15 and the mixer circuit 17, and the SAW filter 22; and an adjacent signal attenuation circuit 51 which attenuates adjacent signals of the tuned IF signal, and outputs the IF signal attenuating the adjacent signals to the SAW filter 22. COPYRIGHT: (C)2006,JPO&NCIPI
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