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.