Patent ID: 6903783

Claim:
A television tuner comprising: an input terminal configured to receive a television signal in a VHF band or a UHF band; a VHF tuner unit comprising a VHF tuning circuit coupled to said input terminal, and a first field-effect transistor (FET) configured to at least amplify a television signal in the VHF band; a switching transistor configured to switch a bias voltage applied to an input terminal of said first FET; and a UHF tuner unit configured to receive a television signal in the UHF band and coupled to said input terminal via a first switching diode; wherein a predetermined voltage is applied to an anode of said first switching diode, a power supply voltage is applied to a collector of said switching transistor via a power supply resistor and an emitter of said switching transistor is grounded, the collector of said switching transistor is connected to the input terminal of said first FET via a first resistor, and said first switching diode and said switching transistor are both switched on or off depending on whether the television signal in the UHF band is to be received or the television signal in the VHF band is to be received, respectively.