| 摘要 |
PURPOSE:To obtain only a desired wave by providing an output decision means selecting an undesired wave elimination means without eliminating a desired wave by an error signal outputted by plural undesired wave elimination means but outputting an output signal with undesired wave eliminated thereof. CONSTITUTION:An undesired wave elimination means 9 is provided, which has a reference signal with strong correlation with a frequency signal without fail even if the frequency of the desired wave is shifted by Frequency Shift Keying(FSK) radio modulation. Moreover, an output decision means 10 is provided, which selects the undesired wave eliminating means 9 having a reference signal with strong correlativity with the desired wave among plural undesired wave eliminating means 9. Thus, even when the frequency of the desired wave is shifted by an FSK radio modulation signal, the output signal from which the undesired wave eliminated thereof is obtained without eliminating the desired wave. |
