Patent ID: 8145162

Claim:
A tuner device comprising: a plurality of tuner circuits, where each of the tuner circuits includes a radio frequency amplifier configured to amplify a radio frequency signal of a transmitted broadcast wave, a frequency mixing circuit configured to perform frequency conversion for the radio frequency signal transmitted from the radio frequency amplifier, and a local oscillation circuit configured to transmit a local oscillation signal to the frequency mixing circuit, wherein the local oscillation circuit includes, at least, a reference signal source, a first frequency divider, and a second frequency divider, oscillates a local oscillation signal having a local oscillation frequency f OSC =f REF ×N/M which is expressed by using a reference frequency f REF of the reference signal source, a first dividing ratio 1/M of the first frequency divider, and a second dividing ratio 1/N of the second frequency divider, wherein M and N are positive integers, and makes a difference between local oscillation frequencies of the plurality of tuner circuits greater than or equal to a predetermined value, the difference being generated when each of the plurality of tuner circuits receives the transmitted broadcast wave of a tuning frequency.