Patent ID: 6914639

Claim:
A combination tuner comprising: a first signal receiving unit to receive a television signal and an FM signal using an externally connected antenna; a second signal receiving unit to receive an FM signal using an internal antenna; a signal selecting unit to select reception signals of said first signal receiving unit and a reception signal of said second signal receiving unit; a radio-frequency selecting and amplifying unit to select and amplify the resulting reception signal; a frequency converting unit to convert the amplified radio-frequency signal into an intermediate frequency signal; an intermediate frequency selecting and amplifying unit to select and amplify the intermediate frequency signal; and a switching circuit to switch selection of the television signal or the FM signal according to three-mode band data, wherein said switching circuit includes three transistors which are selectively turned on and off so that one of the television signal from said first signal receiving unit, the FM signal from said second signal receiving unit, and the FM signal from said first signal receiving unit is selected according to the mode of the band data, said switching circuit includes a first transistor whose base is supplied with the band data, the first transistor being an emitter-follower, a second transistor whose base is supplied with the band data, the second transistor being an emitter-follower, and a third transistor whose base and emitter are supplied with an output of the first transistor and an output of the second transistor, respectively.