| 摘要 |
A television tuner includes a first high-frequency circuit for receiving VHF-band television signals, a second high-frequency circuit for receiving UHF-band television signals, and an integrated circuit. The integrated circuit includes a first mixer, a second mixer, a first input terminal that is connected to an input terminal of the first mixer, and a second input terminal that is connected to an input terminal of the second mixer and that is adjacent to the first input terminal. The first high-frequency circuit is connected to the first input terminal, and the second high-frequency circuit is connected to the second input terminal through a switching diode. The switching diode is turned off when the VHF-band television signals are received and is turned on when the UHF-band television signals are received.
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