In a television tuner, a predetermined bias voltage is
applied to the anode of a first switching diode (3). A
power supply voltage is applied to the collector of a
switching transistor (6) via a power supply resistor (7),
and the emitter of the switching transistor is grounded.
The collector of the switching transistor is connected to an
input terminal of a first FET (12) via a first resistor (16).
The first switching diode and the switching transistor are
both switched on or off correspondingly to whether a
television signal in the UHF band is to be received or a
television signal in the VHF band is to be received.