| 摘要 |
<P>PROBLEM TO BE SOLVED: To demodulate a reception carrier signal SA with accuracy. <P>SOLUTION: The signal level of a reception carrier signal SA is detected as the detection value S, by using a first detection clock Ca and a second detection clock Cb, comprising the same frequency as that of the reception carrier signal SA, and the first detection signal and the second detection signal corresponding to the detection clocks are generated, and an amplitude demodulated signal showing the presence or the absence of modulation in the reception carrier signal SA is generated, based on one detection signal that represents that the signal level of the reception carrier signal SA is the largest, and the amplitude demodulated signal is transmitted to a decoder part 25. <P>COPYRIGHT: (C)2008,JPO&INPIT |
