| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize and integrate a device by giving a driving AC signal to a magnetic impedance effect element, rectifying the mix signal of a received radio wave signal and the driving AC signal and separating and extracting the received radio signal from the mix signal. SOLUTION: A driving AC signal is given to a magnetic impedance effect element 11b by a driving circuit 11a and output voltage by impedance is generated on both ends of the magnetic impedance effect element 11b. When the radio signal of an AM wave reaches a reception device, the amplitude of output voltage on both ends of the magnetic impedance effect element 11b changes in accordance with the change of the amplitude of a magnetic component in the radio signal. Since the amplitude of output voltage on both ends of the magnetic impedance effect element 11b changes in accordance with the change of the amplitude of a carrier, outputs from both ends of the magnetic impedance effect element 11b become the mix signals of the received radio signal of a carrier and the driving AC signal and are inputted to a rectifying circuit 11c. They are inputted to a frequency discriminator 11d after they are rectified and the driving AC signal is removed.
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