RECEIVING DEVICE, ELECTRONIC DEVICE USING THE SAME, AND RECEIVING METHOD

摘要

A receiving device comprising a main tuner (11), a sub-tuner (12), and a control unit (13) is used. The main tuner (11) and the sub-tuner (12) have local oscillators (25, 45), respectively, for generating a local oscillation signal according to the frequency of a selected channel and extract the signal of the selected channel by using the local oscillation signal. The control unit (13) judges whether the frequency of the channel selected by the main tuner (11) is identical to the frequency of the channel selected by the sub-tuner (12). When it is judged that they are identical, the control unit (13) stops the generation of the local oscillation signal by the local oscillator (45) of the sub-tuner (12) and causes the sub-tuner (12) to extract the signal of the selected channel by using the local oscillation signal generated by the local oscillator (25) of the main tuner.